Differences

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--- система_kubernetes [2024/04/06 11:26]
val [Развертывание через kubeadm]
+++ система_kubernetes [2025/06/18 12:36] (current)
val [Развертывание через kubeadm]
@@ Line 10: / Line 10: @@
   * [[https://habr.com/ru/company/flant/blog/513908/|Полноценный Kubernetes с нуля на Raspberry Pi]]
   * [[https://habr.com/ru/companies/domclick/articles/566224/|Различия между Docker, containerd, CRI-O и runc]]
+  * [[https://daily.dev/blog/kubernetes-cni-comparison-flannel-vs-calico-vs-canal|Kubernetes CNI Comparison: Flannel vs Calico vs Canal]]
   * [[https://habr.com/ru/company/vk/blog/542730/|11 факапов PRO-уровня при внедрении Kubernetes и как их избежать]]
@@ Line 17: / Line 18: @@
   * [[https://www.youtube.com/watch?v=XZQ7-7vej6w|Наш опыт с Kubernetes в небольших проектах / Дмитрий Столяров (Флант)]]
-  * [[https://alesnosek.com/blog/2017/02/14/accessing-kubernetes-pods-from-outside-of-the-cluster/|Accessing Kubernetes Pods From Outside of the Cluster]]
+  * [[https://habr.com/ru/companies/aenix/articles/541118/|Ломаем и чиним Kubernetes]]
 ===== Инструмент командной строки kubectl =====
   * [[https://kubernetes.io/docs/reference/generated/kubectl/kubectl-commands]]
+  * [[https://kubernetes.io/ru/docs/reference/kubectl/cheatsheet/|Шпаргалка по kubectl]]
 ==== Установка ====
@@ Line 62: / Line 66: @@
 === Настройка автодополнения ===
 <code>
-gitlab-runner@server:~$ source <(kubectl completion bash)
+kube1:~# less /etc/bash_completion.d/kubectl.sh
+  или
+$ cat ~/.profile
+</code><code>
+#...
+source <(kubectl completion bash)
+alias k=kubectl
+complete -F __start_kubectl k
+#...
 </code>
@@ Line 83: / Line 98: @@
 ===== Установка minikube =====
-  * [[https://www.linuxtechi.com/how-to-install-minikube-on-ubuntu/|How to Install Minikube on Ubuntu 20.04 LTS / 21.04]]
   * [[https://minikube.sigs.k8s.io/docs/start/|Documentation/Get Started/minikube start]]
@@ Line 99: / Line 113: @@
 <code>
-gitlab-runner@server:~$ ### minikube delete
-gitlab-runner@server:~$ ### rm -rv .minikube/
 gitlab-runner@server:~$ time minikube start --driver=docker --insecure-registry "server.corpX.un:5000"
-real    29m8.320s
+real    41m8.320s
 ...
@@ Line 109: / Line 120: @@
 gitlab-runner@server:~$ minikube ip
+</code>
+==== minikube kubectl ====
+<code>
+gitlab-runner@server:~$ minikube kubectl -- get pods -A
+gitlab-runner@server:~$ cat ~/.profile
+</code><code>
+#...
+# not work in gitlab-ci
+alias kubectl='minikube kubectl --'
+#...
+</code><code>
+gitlab-runner@server:~$ kubectl get pods -A
+</code>
+или
+  * [[#Инструмент командной строки kubectl]]
+==== minikube addons list ====
+<code>
 gitlab-runner@server:~$ minikube addons list
-gitlab-runner@server:~$ minikube addons configure registry-creds   #Не нужно для registry попубличных проектов
+gitlab-runner@server:~$ minikube addons configure registry-creds
 ...
 Do you want to enable Docker Registry? [y/n]: y
@@ Line 121: / Line 154: @@
 gitlab-runner@server:~$ minikube addons enable registry-creds
-gitlab-runner@server:~$ minikube kubectl -- get pods -A
-gitlab-runner@server:~$ alias kubectl='minikube kubectl --'
-gitlab-runner@server:~$ kubectl get pods -A
 </code>
-или
+==== minikube start stop delete ====
-  * [[#Инструмент командной строки kubectl]]
 <code>
 gitlab-runner@server:~$ ###minikube stop
+gitlab-runner@server:~$ ### minikube delete
+gitlab-runner@server:~$ ### rm -rv .minikube/
 gitlab-runner@server:~$ ###minikube start
@@ Line 143: / Line 170: @@
 ==== Развертывание через kubeadm ====
+  * [[https://kubernetes.io/docs/setup/production-environment/tools/kubeadm/install-kubeadm/|Installing kubeadm]]
   * [[https://kubernetes.io/docs/setup/production-environment/tools/kubeadm/create-cluster-kubeadm/|kubernetes.io Creating a cluster with kubeadm]]
-  * [[https://infoit.com.ua/linux/kak-ustanovit-kubernetes-na-ubuntu-20-04-lts/|Как установить Kubernetes на Ubuntu 20.04 LTS]]
   * [[https://www.linuxtechi.com/install-kubernetes-on-ubuntu-22-04/|How to Install Kubernetes Cluster on Ubuntu 22.04]]
-  * [[https://www.linuxtechi.com/install-kubernetes-cluster-on-debian/|https://www.linuxtechi.com/install-kubernetes-cluster-on-debian/]]
+  * [[https://www.linuxtechi.com/install-kubernetes-cluster-on-debian/|https://www.linuxtechi.com/install-kubernetes-cluster-on-debian/|How to Install Kubernetes Cluster on Debian 12 | 11]]
-  * [[https://www.cloud4y.ru/blog/installation-kubernetes/|Установка Kubernetes]]
+  * [[https://www.baeldung.com/ops/kubernetes-cluster-components|Kubernetes Cluster Components]]
 === Подготовка узлов ===
@@ Line 171: / Line 201: @@
 === Установка ПО ===
+=== !!! Обратитесь к преподавателю !!! ===
+== Установка и настройка CRI ==
 <code>
-node1# bash -c '
+node1_2_3# apt-get install -y docker.io
-http_proxy=http://proxy.isp.un:3128/ apt -y install apt-transport-https curl
-ssh node2 http_proxy=http://proxy.isp.un:3128/ apt -y install apt-transport-https curl
-ssh node3 http_proxy=http://proxy.isp.un:3128/ apt -y install apt-transport-https curl
-'
-node1# bash -c '
+Проверяем, если:
-curl -s https://packages.cloud.google.com/apt/doc/apt-key.gpg | sudo apt-key add
+node1# containerd config dump | grep SystemdCgroup
-ssh node2 "curl -s https://packages.cloud.google.com/apt/doc/apt-key.gpg | sudo apt-key add"
+не равно:
-ssh node3 "curl -s https://packages.cloud.google.com/apt/doc/apt-key.gpg | sudo apt-key add"
+           SystemdCgroup = true
+то, выполняем следующие 4-ре команды:
+bash -c 'mkdir -p /etc/containerd/
+ssh node2 mkdir -p /etc/containerd/
+ssh node3 mkdir -p /etc/containerd/
+'
+bash -c 'containerd config default > /etc/containerd/config.toml
+ssh node2 "containerd config default > /etc/containerd/config.toml"
+ssh node3 "containerd config default > /etc/containerd/config.toml"
+'
+bash -c 'sed -i "s/SystemdCgroup \= false/SystemdCgroup \= true/g" /etc/containerd/config.toml
+ssh node2 sed -i \"s/SystemdCgroup \= false/SystemdCgroup \= true/g\" /etc/containerd/config.toml
+ssh node3 sed -i \"s/SystemdCgroup \= false/SystemdCgroup \= true/g\" /etc/containerd/config.toml
+'
+bash -c 'service containerd restart
+ssh node2 service containerd restart
+ssh node3 service containerd restart
+'
+</code>
+== Подключаем репозиторий и устанавливаем ПО ==
+<code>
+bash -c 'mkdir -p /etc/apt/keyrings
+ssh node2 mkdir -p /etc/apt/keyrings
+ssh node3 mkdir -p /etc/apt/keyrings
 '
-node1# bash -c '
+bash -c 'curl -fsSL https://pkgs.k8s.io/core:/stable:/v1.30/deb/Release.key | gpg --dearmor -o /etc/apt/keyrings/kubernetes-apt-keyring.gpg
-apt-add-repository "deb http://apt.kubernetes.io/ kubernetes-xenial main"
+ssh node2 "curl -fsSL https://pkgs.k8s.io/core:/stable:/v1.30/deb/Release.key | gpg --dearmor -o /etc/apt/keyrings/kubernetes-apt-keyring.gpg"
-ssh node2 apt-add-repository \"deb http://apt.kubernetes.io/ kubernetes-xenial main\"
+ssh node3 "curl -fsSL https://pkgs.k8s.io/core:/stable:/v1.30/deb/Release.key | gpg --dearmor -o /etc/apt/keyrings/kubernetes-apt-keyring.gpg"
-ssh node3 apt-add-repository \"deb http://apt.kubernetes.io/ kubernetes-xenial main\"
 '
-node1# bash -c '
+bash -c 'echo "deb [signed-by=/etc/apt/keyrings/kubernetes-apt-keyring.gpg] https://pkgs.k8s.io/core:/stable:/v1.30/deb/ /" | tee /etc/apt/sources.list.d/kubernetes.list
-http_proxy=http://proxy.isp.un:3128/ apt -y install kubeadm kubelet kubectl kubernetes-cni
+ssh node2 echo "deb [signed-by=/etc/apt/keyrings/kubernetes-apt-keyring.gpg] https://pkgs.k8s.io/core:/stable:/v1.30/deb/ /" \| tee /etc/apt/sources.list.d/kubernetes.list
-ssh node2 http_proxy=http://proxy.isp.un:3128/ apt -y install kubeadm kubelet kubectl kubernetes-cni
+ssh node3 echo "deb [signed-by=/etc/apt/keyrings/kubernetes-apt-keyring.gpg] https://pkgs.k8s.io/core:/stable:/v1.30/deb/ /" \| tee /etc/apt/sources.list.d/kubernetes.list
-ssh node3 http_proxy=http://proxy.isp.un:3128/ apt -y install kubeadm kubelet kubectl kubernetes-cni
 '
-https://forum.linuxfoundation.org/discussion/864693/the-repository-http-apt-kubernetes-io-kubernetes-xenial-release-does-not-have-a-release-file
+bash -c 'apt-get update && apt-get install -y kubelet kubeadm kubectl
-!!!! Внимание на каждом узле нужно сделать: !!!!
+ssh node2 "apt-get update && apt-get install -y kubelet kubeadm kubectl"
+ssh node3 "apt-get update && apt-get install -y kubelet kubeadm kubectl"
-удалить из /etc/apt/sources.list строчку с kubernetes
+'
+Время выполнения: 2 минуты
-mkdir /etc/apt/keyrings
-curl -fsSL https://pkgs.k8s.io/core:/stable:/v1.28/deb/Release.key | sudo gpg --dearmor -o /etc/apt/keyrings/kubernetes-apt-keyring.gpg
-echo 'deb [signed-by=/etc/apt/keyrings/kubernetes-apt-keyring.gpg] https://pkgs.k8s.io/core:/stable:/v1.28/deb/ /' | sudo tee /etc/apt/sources.list.d/kubernetes.list
-apt update
-apt install -y kubeadm=1.28.1-1.1 kubelet=1.28.1-1.1 kubectl=1.28.1-1.1
 </code>
 === Инициализация master ===
+  * [[https://stackoverflow.com/questions/70416935/create-same-master-and-working-node-in-kubenetes|Create same master and working node in kubenetes]]
 <code>
 root@node1:~# kubeadm init --pod-network-cidr=10.244.0.0/16 --apiserver-advertise-address=192.168.X.201
+Время выполнения: 3 минуты
 root@node1:~# mkdir -p $HOME/.kube
 root@node1:~# cp -i /etc/kubernetes/admin.conf $HOME/.kube/config
+</code>
+=== Настройка сети ===
+<code>
+root@nodeN:~# lsmod | grep br_netfilter
+</code>
+  * [[Управление ядром и модулями в Linux#Модули ядра]]
+<code>
 root@node1:~# kubectl apply -f https://raw.githubusercontent.com/coreos/flannel/master/Documentation/kube-flannel.yml
+</code>
-root@node1:~# kubectl get pod -o wide --all-namespaces
+=== Проверка работоспособности ===
+<code>
+root@node1:~# kubectl get pod --all-namespaces -o wide
 root@node1:~# kubectl get --raw='/readyz?verbose'
-</code>
-  * Может понадобиться в случае возникновения ошибки [[https://github.com/containerd/containerd/issues/4581|[ERROR CRI]: container runtime is not running]]
-<code>
-node1# bash -c '
-rm /etc/containerd/config.toml
-systemctl restart containerd
-ssh node2 rm /etc/containerd/config.toml
-ssh node2 systemctl restart containerd
-ssh node3 rm /etc/containerd/config.toml
-ssh node3 systemctl restart containerd
-'
 </code>
@@ Line 244: / Line 286: @@
 <code>
 root@node2_3:~# curl -k https://node1:6443/livez?verbose
-</code>
-  * [[https://github.com/containerd/containerd/issues/4581|[ERROR CRI]: container runtime is not running]]
-<code>
 root@node2_3:~# kubeadm join 192.168.X.201:6443 --token NNNNNNNNNNNNNNNNNNNN \
         --discovery-token-ca-cert-hash sha256:NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
+root@node2_3:~# curl -sSL http://127.0.0.1:10248/healthz
+root@node1:~# kubeadm token list
+root@node1:~# kubeadm token create --print-join-command
 </code>
 === Проверка состояния ===
@@ Line 255: / Line 301: @@
 root@node1:~# kubectl get nodes -o wide
+root@node1:~# kubectl describe node node2
 </code>
@@ Line 264: / Line 312: @@
 $ kubectl cordon kube3
-$ time kubectl drain kube3 --force --ignore-daemonsets --delete-emptydir-data
+$ time kubectl drain kube3 #--ignore-daemonsets --delete-emptydir-data --force
 $ kubectl delete node kube3
@@ Line 282: / Line 330: @@
 === Настройка доступа к Insecure Private Registry ===
+=== !!! Обратитесь к преподавателю !!! ===
   * [[https://github.com/containerd/containerd/issues/4938|Unable to pull image from insecure registry, http: server gave HTTP response to HTTPS client #4938]]
@@ Line 292: / Line 341: @@
 <code>
-root@node1:~# mkdir /etc/containerd/
+root@node1:~# mkdir -p /etc/containerd/
+root@node1:~# ###containerd config default > /etc/containerd/config.toml
 root@node1:~# cat /etc/containerd/config.toml
 </code><code>
-version = 2
+...
+      [plugins."io.containerd.grpc.v1.cri".registry.mirrors]
-[plugins."io.containerd.grpc.v1.cri".registry]
+        [plugins."io.containerd.grpc.v1.cri".registry.mirrors."server.corpX.un:5000"]
-  [plugins."io.containerd.grpc.v1.cri".registry.mirrors]
+          endpoint = ["http://server.corpX.un:5000"]
-    [plugins."io.containerd.grpc.v1.cri".registry.mirrors."server.corpX.un:5000"]
+...
-      endpoint = ["http://server.corpX.un:5000"]
-# no need
-#  [plugins."io.containerd.grpc.v1.cri".registry.configs]
-#    [plugins."io.containerd.grpc.v1.cri".registry.configs."server.corpX.un:5000".tls]
-#      insecure_skip_verify = true
-# don't work in cri-tools 1.25, need public project
-#[plugins."io.containerd.grpc.v1.cri".registry.configs."server.corpX.un:5000".auth]
-#      auth = "c3R1ZGVudDpwYXNzd29yZA=="
 </code><code>
 node1# bash -c '
-ssh node2 mkdir /etc/containerd/
+ssh node2 mkdir -p /etc/containerd/
-ssh node3 mkdir /etc/containerd/
+ssh node3 mkdir -p /etc/containerd/
 scp /etc/containerd/config.toml node2:/etc/containerd/config.toml
 scp /etc/containerd/config.toml node3:/etc/containerd/config.toml
@@ Line 323: / Line 364: @@
 root@nodeN:~# containerd config dump | less
+</code>
+== сontainerd v3 ==
+  * [[https://stackoverflow.com/questions/79305194/unable-to-pull-image-from-insecure-registry-http-server-gave-http-response-to/79308521#79308521]]
+<code>
+# mkdir -p /etc/containerd/certs.d/server.corpX.un:5000/
+# cat /etc/containerd/certs.d/server.corpX.un:5000/hosts.toml
+</code><code>
+[host."http://server.corpX.un:5000"]
+  capabilities = ["pull", "resolve", "push"]
+  skip_verify = true
+</code><code>
+# systemctl restart containerd.service
 </code>
@@ Line 329: / Line 386: @@
 <code>
 root@nodeN:~# crictl -r unix:///run/containerd/containerd.sock pull server.corpX.un:5000/student/gowebd
-</code>
+root@kubeN:~# crictl pull server.corpX.un:5000/student/pywebd2
+</code>
 ==== Развертывание через Kubespray ====
@@ Line 340: / Line 398: @@
   * [[https://kubernetes.io/docs/setup/production-environment/tools/kubespray/|Installing Kubernetes with Kubespray]]
-  * [[https://stackoverflow.com/questions/29882263/browse-list-of-tagged-releases-in-a-repo]]
+=== Подготовка к развертыванию через Kubespray ===
+  * [[Язык программирования Python#Виртуальная среда Python]]
 <code>
-kube1# ssh-keygen
+(venv1) server# ssh-keygen
-kube1# ssh-copy-id kube1;ssh-copy-id kube2;ssh-copy-id kube3;ssh-copy-id kube4;
+(venv1) server# ssh-copy-id kube1;ssh-copy-id kube2;ssh-copy-id kube3;ssh-copy-id kube4;
-kube1# apt update
+(venv1) server# git clone https://github.com/kubernetes-sigs/kubespray
-kube1# apt install python3-pip -y
+(venv1) server# cd kubespray/
-kube1# git clone https://github.com/kubernetes-sigs/kubespray
+(venv1) server:~/kubespray# git tag -l
-kube1# cd kubespray/
+(venv1) server:~/kubespray# git checkout tags/v2.26.0
+  или
+(venv1) server:~/kubespray# git checkout tags/v2.27.0
-~/kubespray# grep -r containerd_insecure_registries .
+(venv1) server:~/kubespray# time pip3 install -r requirements.txt
-~/kubespray# git log
-~/kubespray# git branch -r
+(venv1) server:~/kubespray# cp -rvfpT inventory/sample inventory/mycluster
-~/kubespray# ### git checkout origin/release-2.22
-~/kubespray# git tag -l
+(venv1) server:~/kubespray# cat inventory/mycluster/hosts.yaml
-~/kubespray# ### git checkout tags/v2.22.1
+</code><code>
+all:
-~/kubespray# git checkout 4c37399c7582ea2bfb5202c3dde3223f9c43bf59
+  hosts:
+    kube1:
-~/kubespray# ### git checkout master
+    kube2:
+    kube3:
+    kube4:
+  children:
+    kube_control_plane:
+      hosts:
+        kube1:
+        kube2:
+    kube_node:
+      hosts:
+        kube1:
+        kube2:
+        kube3:
+    etcd:
+      hosts:
+        kube1:
+        kube2:
+        kube3:
+    k8s_cluster:
+      children:
+        kube_control_plane:
+        kube_node:
+    calico_rr:
+      hosts: {}
+</code><code>
+(venv1) server:~/kubespray# ansible all -m ping -i inventory/mycluster/hosts.yaml
 </code>
-  * Может потребоваться [[Язык программирования Python#Виртуальная среда Python]]
+  * [[Сервис Ansible#Использование модулей]] Ansible для отключения swap
-  * Может потребоваться [[https://github.com/kubernetes-sigs/kubespray/issues/10688|"The conditional check 'groups.get('kube_control_plane')' failed. The error was: Conditional is marked as unsafe, and cannot be evaluated." #10688]]
+  * [[Сервис Ansible#Использование ролей]] Ansible для настройки сети
+=== Развертывание кластера через Kubespray ===
 <code>
-~/kubespray# time pip3 install -r requirements.txt
-real    1m48.202s
-~/kubespray# cp -rvfpT inventory/sample inventory/mycluster
-~/kubespray# declare -a IPS=(kube1,192.168.X.221 kube2,192.168.X.222 kube3,192.168.X.223)
-~/kubespray# CONFIG_FILE=inventory/mycluster/hosts.yaml python3 contrib/inventory_builder/inventory.py ${IPS[@]}
-~/kubespray# less inventory/mycluster/hosts.yaml
 ~/kubespray# time ansible-playbook -i inventory/mycluster/hosts.yaml cluster.yml
 real    45m31.796s
@@ Line 394: / Line 469: @@
 === Добавление узла через Kubespray ===
+  * [[https://github.com/kubernetes-sigs/kubespray/blob/master/docs/operations/nodes.md|Adding/replacing a node (github.com/kubernetes-sigs/kubespray)]]
+  * [[https://nixhub.ru/posts/k8s-nodes-scale/|K8s - добавление нод через kubespray]]
+  * [[https://blog.unetresgrossebite.com/?p=934|Redeploy Kubernetes Nodes with KubeSpray]]
 <code>
 ~/kubespray# cat inventory/mycluster/hosts.yaml
 </code><code>
+all:
+  hosts:
 ...
-    node4:
+    kube4:
-      ansible_host: 192.168.X.204
-      ip: 192.168.X.204
-      access_ip: 192.168.X.204
 ...
     kube_node:
+      hosts:
 ...
-        node4:
+        kube4:
 ...
 </code><code>
+(venv1) server:~/kubespray# time ansible-playbook -i inventory/mycluster/hosts.yaml cluster.yml
+real    6m31.562s
-~/kubespray# time ansible-playbook -i inventory/mycluster/hosts.yaml --limit=kube4 scale.yml
+~/kubespray# ###time ansible-playbook -i inventory/mycluster/hosts.yaml --limit=kube4 scale.yml
 real    17m37.459s
@@ Line 456: / Line 538: @@
 <code>
 $ kubectl api-resources
-$ kubectl run my-debian --image=debian -- "sleep" "3600"
 $ ###kubectl run -ti --rm my-debian --image=debian --overrides='{"spec": { "nodeSelector": {"kubernetes.io/hostname": "kube4"}}}'
-$ kubectl get all
+$ kubectl run my-debian --image=debian -- "sleep" "60"
+$ kubectl get pods
 kubeN# crictl ps | grep debi
@@ Line 469: / Line 551: @@
 $ kubectl delete pod my-debian
+$ ###kubectl delete pod my-debian --grace-period=0 --force
-$ kubectl create deployment my-debian --image=debian -- "sleep" "3600"
+$ kubectl create deployment my-debian --image=debian -- "sleep" "infinity"
+$ kubectl get all
 $ kubectl get deployments
+$ kubectl get replicasets
 </code>
   * [[#Настройка автодополнения]]
@@ Line 480: / Line 565: @@
 $ kubectl exec -ti my-debian-NNNNNNNNN-NNNNN -- bash
 Ctrl-D
+</code>
+  * [[Технология Docker#Анализ параметров запущенного контейнера изнутри]]
+<code>
 $ kubectl get deployment my-debian -o yaml
 </code>
@@ Line 491: / Line 578: @@
 $ kubectl delete deployment my-debian
 </code>
+==== Manifest ====
   * [[https://kubernetes.io/docs/reference/glossary/?all=true#term-manifest|Kubernetes Documentation Reference Glossary/Manifest]]
 <code>
@@ Line 514: / Line 604: @@
         image: debian
         command: ["/bin/sh"]
-        args: ["-c", "while true; do echo hello; sleep 3;done"]
+        args: ["-c", "while :;do echo -n random-value:;od -A n -t d -N 1 /dev/urandom;sleep 5; done"]
+        resources:
+          requests:
+            memory: "64Mi"
+            cpu: "250m"
+          limits:
+            memory: "128Mi"
+            cpu: "500m"
       restartPolicy: Always
 </code><code>
-$ kubectl apply -f my-debian-deployment.yaml
+$ kubectl apply -f my-debian-deployment.yaml #--dry-run=client #-o yaml
+$ kubectl logs -l app=my-debian -f
 ...
 $ kubectl delete -f my-debian-deployment.yaml
 </code>
 ==== namespace для своего приложения ====
+==== Deployment ====
+  * [[https://stackoverflow.com/questions/52857825/what-is-an-endpoint-in-kubernetes|What is an 'endpoint' in Kubernetes?]]
   * [[https://matthewpalmer.net/kubernetes-app-developer/articles/kubernetes-volumes-example-nfs-persistent-volume.html|How to use an NFS volume]]
+  * [[https://www.kryukov.biz/kubernetes/lokalnye-volumes/emptydir/|emptyDir]]
   * [[https://hub.docker.com/_/httpd|The Apache HTTP Server Project - httpd Docker Official Image]]
+  * [[https://habr.com/ru/companies/oleg-bunin/articles/761662/|Дополнительные контейнеры в Kubernetes и где они обитают: от паттернов к автоматизации управления]]
+  * [[https://stackoverflow.com/questions/39436845/multiple-command-in-poststart-hook-of-a-container|multiple command in postStart hook of a container]]
+  * [[https://stackoverflow.com/questions/33887194/how-to-set-multiple-commands-in-one-yaml-file-with-kubernetes|How to set multiple commands in one yaml file with Kubernetes?]]
 <code>
@@ Line 543: / Line 650: @@
 metadata:
   name: my-webd
+#  annotations:
+#    kubernetes.io/change-cause: "update to ver1.2"
 spec:
   selector:
@@ Line 558: / Line 667: @@
 #        image: server.corpX.un:5000/student/webd
 #        image: server.corpX.un:5000/student/webd:ver1.N
+#        image: httpd
+#        args: ["gunicorn", "app:app", "--bind", "0.0.0.0:8000", "-k", "uvicorn.workers.UvicornWorker"]
 #        imagePullPolicy: "Always"
-#        image: httpd
 #        lifecycle:
 #          postStart:
 #            exec:
-#              command: ["/bin/sh", "-c", "echo Hello from apache2 on $(hostname) > /usr/local/apache2/htdocs/index.html"]
+#              command:
+#              - /bin/sh
+#              - -c
+#              - |
+#                #test -f /usr/local/apache2/htdocs/index.html && exit 0
+#                mkdir -p /usr/local/apache2/htdocs/
+#                cd /usr/local/apache2/htdocs/
+#                echo "<h1>Hello from apache2 on $(hostname) at $(date)</h1>" > index.html
+#                echo "<img src=img/logo.gif>" >> index.html
 #        env:
+#        - name: PYWEBD_DOC_ROOT
+#          value: "/usr/local/apache2/htdocs/"
+#        - name: PYWEBD_PORT
+#          value: "4080"
 #        - name: APWEBD_HOSTNAME
 #          value: "apwebd.corpX.un"
@@ Line 578: / Line 700: @@
 #          httpGet:
 #            port: 80
+#            #scheme: HTTPS
+#        volumeMounts:
+#        - name: htdocs-volume
+#          mountPath: /usr/local/apache2/htdocs
 #        volumeMounts:
 #        - name: nfs-volume
 #          mountPath: /var/www
+#      volumes:
+#      - name: htdocs-volume
+#        emptyDir: {}
 #      volumes:
 #      - name: nfs-volume
@@ Line 587: / Line 721: @@
 #          server: server.corpX.un
 #          path: /var/www
+#      initContainers:
+#      - name: load-htdocs-files
+#        image: curlimages/curl
+##        command: ['sh', '-c', 'mkdir /mnt/img; curl http://val.bmstu.ru/unix/Media/logo.gif > /mnt/img/logo.gif']
+#        command: ["/bin/sh", "-c"]
+#        args:
+#        - |
+#          test -d /mnt/img/ && exit 0
+#          mkdir /mnt/img; cd /mnt/img
+#          curl http://val.bmstu.ru/unix/Media/logo.gif > logo.gif
+#          ls -lR /mnt/
+#        volumeMounts:
+#        - mountPath: /mnt
+#          name: htdocs-volume
 </code><code>
-$ kubectl apply -f my-webd-deployment.yaml -n my-ns
+$ kubectl apply -f my-webd-deployment.yaml -n my-ns #--dry-run=client #-o yaml
 $ kubectl get all -n my-ns -o wide
 $ kubectl describe -n my-ns pod/my-webd-NNNNNNNNNN-NNNNN
+$ kubectl -n my-ns logs pod/my-webd-NNNNNNNNNN-NNNNN #-c load-htdocs-files
+$ kubectl logs -l app=my-webd -n my-ns
+(доступны опции -f, --tail=2000, --previous)
 $ kubectl scale deployment my-webd --replicas=3 -n my-ns
 $ kubectl delete pod/my-webd-NNNNNNNNNN-NNNNN -n my-ns
+</code>
+=== Версии deployment ===
+  * [[https://learnk8s.io/kubernetes-rollbacks|How do you rollback deployments in Kubernetes?]]
+  * [[https://kubernetes.io/docs/concepts/workloads/controllers/deployment/#updating-a-deployment|Updating a Deployment]]
+<code>
+$ ###kubectl rollout pause deployment my-webd-dep -n my-ns
+$ ###kubectl set image deployment/my-webd-dep my-webd-con=server.corpX.un:5000/student/gowebd:ver1.2 -n my-ns
+$ ###kubectl rollout resume deployment my-webd-dep -n my-ns
+$ ###kubectl rollout status deployment/my-webd-dep -n my-ns
+$ kubectl rollout history deployment/my-webd -n my-ns
+</code><code>
+REVISION  CHANGE-CAUSE
+         <none>
+...
+N         update to ver1.2
+</code><code>
+$ kubectl rollout history deployment/my-webd --revision=1 -n my-ns
+</code><code>
+...
+    Image:      server.corpX.un:5000/student/webd:ver1.1
+...
+</code><code>
+$ kubectl rollout undo deployment/my-webd --to-revision=1 -n my-ns
+$ kubectl annotate deployment/my-webd kubernetes.io/change-cause="revert to ver1.1" -n my-ns
+$ kubectl rollout history deployment/my-webd -n my-ns
+</code><code>
+REVISION  CHANGE-CAUSE
+         update to ver1.2
+...
+N+1        revert to ver1.1
 </code>
@@ Line 602: / Line 794: @@
   * [[https://kubernetes.io/docs/concepts/services-networking/service/|Kubernetes Documentation Concepts Services, Load Balancing, and Networking Service]]
+  * [[https://alesnosek.com/blog/2017/02/14/accessing-kubernetes-pods-from-outside-of-the-cluster/|Accessing Kubernetes Pods From Outside of the Cluster]]
   * [[https://stackoverflow.com/questions/33069736/how-do-i-get-logs-from-all-pods-of-a-kubernetes-replication-controller|How do I get logs from all pods of a Kubernetes replication controller?]]
 <code>
@@ Line 625: / Line 818: @@
   - protocol: TCP
     port: 80
+#    targetPort: 4080
 #    nodePort: 30111
 </code><code>
 $ kubectl apply -f my-webd-service.yaml -n my-ns
-$ kubectl logs -l app=my-webd -n my-ns
+$ kubectl describe svc my-webd -n my-ns
-(доступны опции -f, --tail=2000, --previous)
+$ kubectl get endpoints -n my-ns
 </code>
 === NodePort ===
+  * [[https://www.baeldung.com/ops/kubernetes-nodeport-range|Why Kubernetes NodePort Services Range From 30000 – 32767]]
 <code>
 $ kubectl get svc my-webd -n my-ns
@@ Line 638: / Line 836: @@
 my-webd-svc   NodePort   10.102.135.146   <none>        80:NNNNN/TCP   18h
-$ kubectl describe svc my-webd -n my-ns
+$ curl http://kube1,2,3:NNNNN
-$ curl http://node1,2,3:NNNNN
-на "самодельном kubeadm" кластере работает не стабильно
 </code>
 == NodePort Minikube ==
@@ Line 647: / Line 842: @@
 $ minikube service list
-$ minikube service my-webd -n my-ns --url
+$ minikube service my-webd --url -n my-ns
 http://192.168.49.2:NNNNN
-$ curl $(minikube service my-webd -n my-ns --url)
+$ curl http://192.168.49.2:NNNNN
 </code>
@@ Line 678: / Line 873: @@
 spec:
   addresses:
-  - 192.168.13.64/28
+  - 192.168.X.64/28
   autoAssign: false
+#  autoAssign: true
 ---
 apiVersion: metallb.io/v1beta1
@@ Line 694: / Line 890: @@
 $ kubectl apply -f first-pool.yaml
-$ ### kubectl delete -f first-pool.yaml && rm first-pool.yaml
+...
+$ kubectl get svc my-webd -n my-ns
+NAME      TYPE           CLUSTER-IP     EXTERNAL-IP     PORT(S)        AGE
+my-webd   LoadBalancer   10.233.23.29   192.168.X.64   80:NNNNN/TCP   50s
+$ #kubectl delete -f first-pool.yaml && rm first-pool.yaml
-$ ### kubectl apply -f https://raw.githubusercontent.com/metallb/metallb/v0.14.3/config/manifests/metallb-native.yaml
+$ #kubectl delete -f https://raw.githubusercontent.com/metallb/metallb/v0.14.3/config/manifests/metallb-native.yaml
 </code>
@@ Line 702: / Line 904: @@
 <code>
 kube1# host my-webd.my-ns.svc.cluster.local 169.254.25.10
-...10.102.135.146...
-server# ssh -p 32222 nodeN
+kube1# curl my-webd.my-ns.svc.cluster.local
-my-openssh-server-NNNNNNNN-NNNNN:~# curl my-webd.my-ns.svc.cluster.local
-  ИЛИ
-my-openssh-server-NNNNNNNN-NNNNN:~# curl my-webd-webd-chart.my-ns.svc.cluster.local
 </code>
@@ Line 807: / Line 1004: @@
 node1# kubectl get all -n ingress-nginx
-node1# ### kubectl delete -f ingress-nginx.controller-v1.3.1.baremetal.yaml
+node1# ###kubectl delete -A ValidatingWebhookConfiguration ingress-nginx-admission
+node1# ###kubectl delete -f ingress-nginx.controller-v1.3.1.baremetal.yaml
 </code>
-=== Управление конфигурацией ingress-nginx-controller  ===
+=== Ingress baremetal DaemonSet ===
 <code>
-master-1:~$ kubectl exec -n ingress-nginx pods/ingress-nginx-controller-<TAB> -- cat /etc/nginx/nginx.conf | tee nginx.conf
+kube1:~# mkdir -p ingress-nginx; cd $_
-master-1:~$ kubectl edit -n ingress-nginx configmaps ingress-nginx-controller
+kube1:~/ingress-nginx# curl https://raw.githubusercontent.com/kubernetes/ingress-nginx/controller-v1.12.0/deploy/static/provider/baremetal/deploy.yaml | tee ingress-nginx.controller-v1.12.0.baremetal.yaml
+kube1:~/ingress-nginx# cat ingress-nginx.controller-v1.12.0.baremetal.yaml
 </code><code>
 ...
+apiVersion: v1
+#data: null
 data:
+  allow-snippet-annotations: "true"
   use-forwarded-headers: "true"
+kind: ConfigMap
 ...
+#kind: Deployment
+kind: DaemonSet
+...
+#  strategy:
+#    rollingUpdate:
+#      maxUnavailable: 1
+#    type: RollingUpdate
+...
+      hostNetwork: true                    ### insert this
+      terminationGracePeriodSeconds: 300
+      volumes:
+...
+</code><code>
+kube1:~/ingress-nginx# kubectl apply -f ingress-nginx.controller-v1.12.0.baremetal.yaml
+kube1:~/ingress-nginx# kubectl -n ingress-nginx get pods -o wide
+kube1:~/ingress-nginx# kubectl -n ingress-nginx describe service/ingress-nginx-controller
+</code><code>
+...
+Endpoints:                192.168.X.221:80,192.168.X.222:80,192.168.X.223:80
+...
+</code><code>
+kube1:~/ingress-nginx# ###kubectl delete -f ingress-nginx.controller-v1.12.0.baremetal.yaml
 </code>
-=== Итоговый вариант с DaemonSet ===
+=== Управление конфигурацией ingress-nginx-controller  ===
 <code>
-node1# diff ingress-nginx.controller-v1.8.2.baremetal.yaml.orig ingress-nginx.controller-v1.8.2.baremetal.yaml
+master-1:~$ kubectl exec -n ingress-nginx pods/ingress-nginx-controller-<TAB> -- cat /etc/nginx/nginx.conf | tee nginx.conf
+master-1:~$ kubectl edit -n ingress-nginx configmaps ingress-nginx-controller
 </code><code>
-a324
->   use-forwarded-headers: "true"
-c392,393
-< kind: Deployment
----
-> #kind: Deployment
-> kind: DaemonSet
-,412c411,414
-<   strategy:
-<     rollingUpdate:
-<       maxUnavailable: 1
-<     type: RollingUpdate
----
-> #  strategy:
-> #    rollingUpdate:
-> #      maxUnavailable: 1
-> #    type: RollingUpdate
-a504
->       hostNetwork: true
-</code><code>
-node1# kubectl -n ingress-nginx describe service/ingress-nginx-controller
 ...
-Endpoints:                192.168.X.221:80,192.168.X.222:80,192.168.X.223:80
+data:
+  use-forwarded-headers: "true"
 ...
 </code>
 === ingress example ===
+  * [[https://stackoverflow.com/questions/49829452/why-ingress-serviceport-can-be-port-and-targetport-of-service|!!! The NGINX ingress controller does not use Services to route traffic to the pods]]
+  * [[https://stackoverflow.com/questions/54459015/how-to-configure-ingress-to-direct-traffic-to-an-https-backend-using-https|how to configure ingress to direct traffic to an https backend using https]]
 <code>
-node1# ### kubectl create ingress my-ingress --class=nginx --rule="webd.corpX.un/*=my-webd:80" -n my-ns
+kube1# ### kubectl create ingress my-ingress --class=nginx --rule="webd.corpX.un/*=my-webd:80" -n my-ns
-node1# cat my-ingress.yaml
+kube1# cat my-ingress.yaml
 </code><code>
 apiVersion: networking.k8s.io/v1
@@ Line 863: / Line 1077: @@
 metadata:
   name: my-ingress
+#  annotations:
+#    nginx.ingress.kubernetes.io/canary: "true"
+#    nginx.ingress.kubernetes.io/canary-weight: "30"
 spec:
   ingressClassName: nginx
@@ Line 877: / Line 1094: @@
             name: my-webd
             port:
-              number: 80
+              number: 4080
         path: /
         pathType: Prefix
@@ Line 891: / Line 1108: @@
         pathType: Prefix
 </code><code>
-node1# kubectl apply -f my-ingress.yaml -n my-ns
+kube1# kubectl apply -f my-ingress.yaml -n my-ns
+kube1# kubectl get ingress -n my-ns
-node1# kubectl get ingress -n my-ns
 NAME      CLASS   HOSTS                             ADDRESS                         PORTS   AGE
 my-webd   nginx   webd.corpX.un,gowebd.corpX.un   192.168.X.202,192.168.X.203   80      14m
+</code>
+  * [[Утилита curl]]
+<code>
 $ curl webd.corpX.un
 $ curl gowebd.corpX.un
@@ Line 908: / Line 1125: @@
 $ kubectl logs -n ingress-nginx -l app.kubernetes.io/name=ingress-nginx -f
-node1# ### kubectl delete ingress my-ingress -n my-ns
+kube1# ### kubectl delete ingress my-ingress -n my-ns
 </code>
@@ Line 927: / Line 1144: @@
 ==== Volumes ====
-=== PersistentVolume и PersistentVolumeVolumeClaim ===
+=== hostPath и nodeSelector ===
-<code>
-root@node1:~# ssh node2 mkdir /disk2
-root@node1:~# ssh node2 touch /disk2/disk2_node2
+  * [[Средства программирования shell#Ресурсы Web сервера на shell]] на kube3
-root@node1:~# kubectl label nodes node2 disk2=yes
+<code>
+kube1# kubectl label nodes kube3 htdocs-node=yes
-root@node1:~# kubectl get nodes --show-labels
+kube1# kubectl get nodes --show-labels
-root@node1:~# ###kubectl label nodes node2 disk2-
+kube1:~/pywebd-k8s# cat my-webd-deployment.yaml
-root@node1:~# cat my-debian-deployment.yaml
 </code><code>
 ...
-        args: ["-c", "while true; do echo hello; sleep 3;done"]
         volumeMounts:
-          - name: my-disk2-volume
+        - name: htdocs-volume
-            mountPath: /data
+          mountPath: /usr/local/apache2/htdocs
-#        volumeMounts:
+#        lifecycle:
-#          - name: data
+#        ...
-#            mountPath: /data
       volumes:
-        - name: my-disk2-volume
+      - name: htdocs-volume
-          hostPath:
+        hostPath:
-            path: /disk2/
+          path: /var/www/
       nodeSelector:
-        disk2: "yes"
+        htdocs-node: "yes"
-#      volumes:
+#      initContainers:
-#      - name: data
+#      ...
-#        persistentVolumeClaim:
+</code>
-#          claimName: my-ha-pvc-sz64m
-      restartPolicy: Always
+=== PersistentVolume и PersistentVolumeClaim ===
-</code><code>
-root@node1:~# kubectl apply -f my-debian-deployment.yaml
-root@node1:~# kubectl get all -o wide
-</code>
   * [[https://qna.habr.com/q/629022|Несколько Claim на один Persistent Volumes?]]
@@ Line 978: / Line 1184: @@
 <code>
-root@node1:~# cat my-ha-pv.yaml
+kube1:~/pv# cat my-ha-pv.yaml
 </code><code>
 apiVersion: v1
 kind: PersistentVolume
 metadata:
-  name: my-pv-node2-sz-128m-num-001
+  name: my-pv-kube3-sz-128m-num-001
 #  name: my-pv-kube3-keycloak
-  labels:
+#  labels:
-    type: local
+#    type: local
 spec:
 ## comment storageClassName for keycloak
@@ Line 993: / Line 1199: @@
     storage: 128Mi
 #    storage: 8Gi
-#  volumeMode: Filesystem
   accessModes:
-    - ReadWriteMany
+    - ReadWriteOnce
-#    - ReadWriteOnce
   hostPath:
-    path: /disk2
+#    path: /disk2
+    path: /disk2/dir1
   persistentVolumeReclaimPolicy: Retain
   nodeAffinity:
@@ Line 1007: / Line 1212: @@
           operator: In
           values:
-          - node2
+          - kube3
-#          - kube3
+---
+#...
 </code><code>
-root@node1:~# kubectl apply -f my-ha-pv.yaml
+kube1:~/pv# kubectl apply -f my-ha-pv.yaml
-root@node1:~# kubectl get persistentvolume
+kube1# kubectl get pv
-  или
-root@node1:~# kubectl get pv
-root@kube1:~# ###ssh kube3 'mkdir /disk2/; chmod 777 /disk2/'
+kube1# kubectl delete pv my-pv-kube3-sz-128m-num-001
-...
-root@node1:~# ###kubectl delete pv my-pv-<TAB>
-root@node1:~# cat my-ha-pvc.yaml
+kube3# mkdir -p /disk2/dir{0..3}
+kube3# chmod 777 -R /disk2/
+kube3# find /disk2/
+kube3# ###rm -rf /disk2/
+</code>
+  * [[https://stackoverflow.com/questions/55639436/create-multiple-persistent-volumes-in-one-yaml]]
+  * Знакомимся с [[#Helm]]
+<code>
+kube1:~/pv# cat my-ha-pv-chart/Chart.yaml
+</code><code>
+apiVersion: v2
+name: my-ha-pv-chart
+version: 0.1.0
+</code><code>
+kube1:~/pv# cat my-ha-pv-chart/values.yaml
+</code><code>
+volume_names:
+- "dir1"
+- "dir2"
+- "dir3"
+numVolumes: "3"
+</code><code>
+kube1:~/pv# cat my-ha-pv-chart/templates/my-ha-pv.yaml
+</code><code>
+{{ range .Values.volume_names }}
+{{/* range $k, $v := until (atoi .Values.numVolumes) */}}
+---
+apiVersion: v1
+kind: PersistentVolume
+metadata:
+  name: my-pv-sz-128m-num-{{ . }}
+spec:
+  storageClassName: my-ha-sc
+  capacity:
+    storage: 128Mi
+  accessModes:
+    - ReadWriteOnce
+  hostPath:
+    path: /disk2/{{ . }}/
+{{/*    path: /disk2/dir{{ $v }}/ */}}
+  persistentVolumeReclaimPolicy: Retain
+  nodeAffinity:
+    required:
+      nodeSelectorTerms:
+      - matchExpressions:
+        - key: kubernetes.io/hostname
+          operator: In
+          values:
+          - kube3
+{{ end }}
+</code><code>
+kube1:~/pv# helm template my-ha-pv-chart my-ha-pv-chart/
+kube1:~/pv# helm install my-ha-pv-chart my-ha-pv-chart/
+kube1# kubectl get pv
+kube1:~/pv# ###helm uninstall my-ha-pv-chart
+</code><code>
+kube1:~/pywebd-k8s# cat my-webd-pvc.yaml
 </code><code>
 apiVersion: v1
 kind: PersistentVolumeClaim
 metadata:
-  name: my-ha-pvc-sz64m
+  name: my-webd-pvc
 spec:
   storageClassName: my-ha-sc
-#  storageClassName: local-path
   accessModes:
-    - ReadWriteMany
+    - ReadWriteOnce
   resources:
     requests:
       storage: 64Mi
 </code><code>
-root@node1:~# kubectl apply -f my-ha-pvc.yaml
+kube1:~/pywebd-k8s# kubectl apply -f my-webd-pvc.yaml -n my-ns
-root@node1:~# kubectl get persistentvolumeclaims
+kube1:~/pywebd-k8s# kubectl get pvc -n my-ns
-  или
-root@node1:~# kubectl get pvc
+kube1:~/pywebd-k8s# cat my-webd-deployment.yaml
+</code><code>
 ...
+        volumeMounts:
+        - name: htdocs-volume
+          mountPath: /usr/local/apache2/htdocs
-root@node1:~# ### kubectl delete pvc my-ha-pvc-sz64m
+        lifecycle:
+        ...
+      volumes:
+      - name: htdocs-volume
+        persistentVolumeClaim:
+          claimName: my-webd-pvc
+      initContainers:
+      ...
+</code><code>
+kube3# find /disk2
 </code>
@@ Line 1048: / Line 1328: @@
   * [[https://kubernetes.io/docs/concepts/storage/dynamic-provisioning/|Dynamic Volume Provisioning]]
+  * [[https://kubernetes.io/docs/tasks/administer-cluster/change-default-storage-class/|Changing the default StorageClass]]
 === rancher local-path-provisioner ===
@@ Line 1070: / Line 1351: @@
 ssh root@kube2 'chmod 777 /opt/local-path-provisioner'
 ssh root@kube3 'chmod 777 /opt/local-path-provisioner'
+$ ###kubectl patch storageclass local-path -p '{"metadata": {"annotations":{"storageclass.kubernetes.io/is-default-class":"true"}}}'
 </code>
@@ Line 1085: / Line 1368: @@
 <code>
 kubeN:~# apt install open-iscsi
+(venv1) server:~# ansible all -f 4 -m apt -a 'pkg=open-iscsi state=present update_cache=true' -i /root/kubespray/inventory/mycluster/hosts.yaml
 </code>
   * [[https://github.com/longhorn/longhorn]]
 <code>
 $ kubectl apply -f https://raw.githubusercontent.com/longhorn/longhorn/v1.6.0/deploy/longhorn.yaml
+$ kubectl -n longhorn-system get pods -o wide --watch
 Setting->General
@@ Line 1135: / Line 1422: @@
   * Делаем снапшот
-  * Что-то ломаем
+  * Что-то ломаем (удаляем пользователя)
-  * Останавливаем сервис
+== Остановка сервиса ==
 <code>
@@ Line 1154: / Line 1442: @@
 == Использование backup-ов ==
+  * Разворачиваем [[Сервис NFS]] на server
 <code>
 Setting -> General -> Backup Target -> nfs://server.corp13.un:/var/www (nfs client linux не нужен)
 </code>
   * Volume -> Create Backup, удаляем NS, восстанавливаем Volume из бекапа, создаем NS и создаем для Volume PV/PVC как было, устанавливаем чарт, он подхватывает pv/pvc
+==== ConfigMap, Secret ====
+<code>
+server# scp /etc/pywebd/* kube1:/tmp/
+kube1:~/pywebd-k8s# kubectl create configmap pywebd-conf --from-file=/tmp/pywebd.conf --dry-run=client -o yaml | tee my-webd-configmap.yaml
+kube1:~/pywebd-k8s# cat my-webd-configmap.yaml
+</code><code>
+apiVersion: v1
+data:
+  pywebd.conf: |
+    [default]
+    DocumentRoot = /usr/local/apache2/htdocs
+    Listen = 4443
+kind: ConfigMap
+metadata:
+  creationTimestamp: null
+  name: pywebd-conf
+</code><code>
+kube1:~/pywebd-k8s# kubectl apply -f my-webd-configmap.yaml -n my-ns
+kube1:~/pywebd-k8s# kubectl -n my-ns get configmaps
+kube1:~/pywebd-k8s# kubectl create secret tls pywebd-tls --key /tmp/pywebd.key --cert /tmp/pywebd.crt --dry-run=client -o yaml | tee my-webd-secret-tls.yaml
+kube1:~/pywebd-k8s# less my-webd-secret-tls.yaml
+</code><code>
+apiVersion: v1
+data:
+  tls.crt: ...
+  tls.key: ...
+kind: Secret
+metadata:
+  creationTimestamp: null
+  name: pywebd-tls
+type: kubernetes.io/tls
+</code><code>
+kube1:~/pywebd-k8s# rm -rv /tmp/pywebd.*
+kube1:~/pywebd-k8s# kubectl apply -f my-webd-secret-tls.yaml -n my-ns
+kube1:~/pywebd-k8s# kubectl -n my-ns get secrets
+kube1:~/pywebd-k8s#  kubectl create secret docker-registry regcred --docker-server=server.corpX.un:5000 --docker-username=student --docker-password='strongpassword' -n my-ns
+kube1:~/pywebd-k8s# cat my-webd-deployment.yaml
+</code><code>
+...
+      imagePullSecrets:
+      - name: regcred
+      containers:
+      - name: my-webd
+        image: server.corpX.un:5000/student/pywebd:ver1.2
+        imagePullPolicy: "Always"
+#        env:
+#          ...
+...
+        livenessProbe:
+          httpGet:
+            port: 4443
+            scheme: HTTPS
+...
+        volumeMounts:
+...
+        - name: conf-volume
+          subPath: pywebd.conf
+          mountPath: /etc/pywebd/pywebd.conf
+        - name: secret-tls-volume
+          subPath: tls.crt
+          mountPath: /etc/pywebd/pywebd.crt
+        - name: secret-tls-volume
+          subPath: tls.key
+          mountPath: /etc/pywebd/pywebd.key
+...
+      volumes:
+...
+      - name: conf-volume
+        configMap:
+          name: pywebd-conf
+      - name: secret-tls-volume
+        secret:
+          secretName: pywebd-tls
+...
+</code><code>
+kubeN$ curl --connect-to "":"":<POD_IP>:4443 https://pywebd.corpX.un
+</code>
 ==== ConfigMap ====
@@ Line 1326: / Line 1707: @@
 <code>
-# wget https://get.helm.sh/helm-v3.9.0-linux-amd64.tar.gz
+# wget https://get.helm.sh/helm-v3.16.4-linux-amd64.tar.gz
-# tar -zxvf helm-v3.9.0-linux-amd64.tar.gz
+# tar -zxvf helm-*-linux-amd64.tar.gz
 # mv linux-amd64/helm /usr/local/bin/helm
+$ cat ~/.profile
+</code><code>
+...
+source <(helm completion bash)
 </code>
 ==== Работа с готовыми Charts ====
+  * Сервис Keycloak [[Сервис Keycloak#Kubernetes]]
 === ingress-nginx ===
@@ Line 1341: / Line 1729: @@
   * [[https://devpress.csdn.net/cloud/62fc8e7e7e66823466190055.html|devpress.csdn.net How to install nginx-ingress with hostNetwork on bare-metal?]]
   * [[https://github.com/kubernetes/ingress-nginx/blob/main/charts/ingress-nginx/values.yaml]]
+  * [[https://github.com/kubernetes/ingress-nginx]] --version 4.7.3
 <code>
@@ Line 1355: / Line 1745: @@
-$ mkdir ingress-nginx; cd ingress-nginx
+$ mkdir -p ingress-nginx; cd ingress-nginx
 $ helm template ingress-nginx --repo https://kubernetes.github.io/ingress-nginx --namespace ingress-nginx | tee t1.yaml
@@ Line 1386: / Line 1776: @@
 # kubectl get clusterrolebindings -A | grep -i ingress
 # kubectl get validatingwebhookconfigurations -A | grep -i ingress
+# ###helm uninstall ingress-nginx -n ingress-nginx
 </code>
 ==== Развертывание своего приложения ====
+  * [[https://helm.sh/docs/chart_template_guide/getting_started/|chart_template_guide getting_started]]
   * [[https://opensource.com/article/20/5/helm-charts|How to make a Helm chart in 10 minutes]]
   * [[https://stackoverflow.com/questions/49812830/helm-upgrade-with-same-chart-version-but-different-docker-image-tag|Helm upgrade with same chart version, but different Docker image tag]]
@@ Line 1394: / Line 1787: @@
 <code>
-gitlab-runner@server:~/gowebd-k8s$ helm create webd-chart
+~/gowebd-k8s$ helm create webd-chart
 $ less webd-chart/templates/deployment.yaml
@@ Line 1404: / Line 1797: @@
 ...
 version: 0.1.1
+icon: https://val.bmstu.ru/unix/Media/logo.gif
 ...
 appVersion: "latest"
@@ Line 1443: / Line 1837: @@
 </code><code>
 ...
-          image: "{{ .Values.image.repository }}:{{ .Values.image.tag | default .Chart.AppVersion }}"
+          imagePullPolicy: {{ .Values.image.pullPolicy }}
 #          env:
 #          - name: APWEBD_HOSTNAME
@@ Line 1451: / Line 1845: @@
 #          - name: REALM_NAME
 #            value: "{{ .Values.REALM_NAME }}"
-...
-#          livenessProbe:
-#            httpGet:
-#              path: /
-#              port: http
-#          readinessProbe:
-#            httpGet:
-#              path: /
-#              port: http
 ...
 </code><code>
+$ helm lint webd-chart/
 $ helm template my-webd webd-chart/ | less
 $ helm install my-webd webd-chart/ -n my-ns --create-namespace --wait
+$ curl kubeN -H "Host: gowebd.corpX.un"
 $ kubectl describe events -n my-ns | less
@@ Line 1487: / Line 1876: @@
   * [[https://medium.com/containerum/how-to-make-and-share-your-own-helm-package-50ae40f6c221|How to make and share your own Helm package]]
   * [[https://docs.gitlab.com/ee/user/profile/personal_access_tokens.html|Gitlab Personal access tokens]]
-  * [[Инструмент GitLab#Подключение через API]] - Role: Mainteiner, api, read_registry, write_registry
+  * [[Инструмент GitLab#Подключение через API]] - Role: Mainteiner, api (read_registry, write_registry не нужно)
+=== Добавляем приложение в свой репозиторий ===
 <code>
-gitlab-runner@server:~/gowebd-k8s$ helm repo add --username student --password NNNNN-NNNNNNNNNNNNNNNNNNN webd http://server.corpX.un/api/v4/projects/N/packages/helm/stable
+~/gowebd-k8s$ helm repo add --username student --password NNNNN-NNNNNNNNNNNNNNNNNNN webd https://server.corpX.un/api/v4/projects/N/packages/helm/stable
 "webd" has been added to your repositories
-gitlab-runner@server:~/gowebd-k8s$ ### helm repo remove webd
+~/gowebd-k8s$ helm repo list
-gitlab-runner@server:~/gowebd-k8s$ helm repo list
+~/gowebd-k8s$ helm package webd-chart
-gitlab-runner@server:~/gowebd-k8s$ helm package webd-chart
+~/gowebd-k8s$ tar -tf webd-chart-0.1.1.tgz
-gitlab-runner@server:~/gowebd-k8s$ tar -tf webd-chart-0.1.1.tgz
+~/gowebd-k8s$ helm plugin install https://github.com/chartmuseum/helm-push
-gitlab-runner@server:~/gowebd-k8s$ helm plugin install https://github.com/chartmuseum/helm-push
+~/gowebd-k8s$ helm cm-push webd-chart-0.1.1.tgz webd
-gitlab-runner@server:~/gowebd-k8s$ helm cm-push webd-chart-0.1.1.tgz webd
+~/gowebd-k8s$ rm webd-chart-0.1.1.tgz
-gitlab-runner@server:~/gowebd-k8s$ rm webd-chart-0.1.1.tgz
+~/gowebd-k8s$ ### helm repo remove webd
-</code><code>
-kube1:~# helm repo add webd http://server.corpX.un/api/v4/projects/N/packages/helm/stable
+~/gowebd-k8s$ ### helm plugin uninstall cm-push
+</code>
+=== Устанавливаем приложение через подключение репозитория ===
+<code>
+kube1:~# helm repo add webd https://server.corpX.un/api/v4/projects/N/packages/helm/stable
 kube1:~# helm repo update
@@ Line 1513: / Line 1908: @@
 kube1:~# helm repo update webd
+kube1:~# helm show values webd/webd-chart | tee values.yaml.orig
+kube1:~# ###helm pull webd/webd-chart
 kube1:~# helm install my-webd webd/webd-chart
 kube1:~# ###helm uninstall my-webd
-</code><code>
+kube1:~# ###helm repo remove webd
+</code>
+=== Устанавливаем приложение без подключение репозитория ===
+<code>
 kube1:~# mkdir gowebd; cd gowebd
-kube1:~/gowebd# ###helm pull webd-chart --repo https://server.corp13.un/api/v4/projects/1/packages/helm/stable
+kube1:~/gowebd# ###helm pull webd-chart --repo https://server.corpX.un/api/v4/projects/N/packages/helm/stable
-kube1:~/gowebd# helm show values webd-chart --repo https://server.corp13.un/api/v4/projects/1/packages/helm/stable | tee values.yaml.orig
+kube1:~/gowebd# helm show values webd-chart --repo https://server.corpX.un/api/v4/projects/N/packages/helm/stable | tee values.yaml.orig
 kube1:~/gowebd# cat values.yaml
@@ Line 1531: / Line 1934: @@
 #REALM_NAME: "corp"
 </code><code>
-kube1:~/gowebd# helm upgrade my-webd -i webd-chart -f values.yaml -n my-ns --create-namespace --repo https://server.corp13.un/api/v4/projects/1/packages/helm/stable
+kube1:~/gowebd# helm upgrade my-webd -i webd-chart -f values.yaml -n my-ns --create-namespace --repo https://server.corpX.un/api/v4/projects/N/packages/helm/stable
 $ curl http://kubeN -H "Host: gowebd.corpX.un"
@@ Line 1539: / Line 1942: @@
 ==== Работа с публичными репозиториями ====
+=== gitlab-runner kubernetes ===
 <code>
-helm repo add gitlab https://charts.gitlab.io
+kube1:~/gitlab-runner# kubectl create ns gitlab-runner
+kube1:~/gitlab-runner# kubectl -n gitlab-runner create configmap ca-crt --from-file=/usr/local/share/ca-certificates/ca.crt
+kube1:~/gitlab-runner# helm repo add gitlab https://charts.gitlab.io
+kube1:~/gitlab-runner# helm repo list
+kube1:~/gitlab-runner# helm search repo -l gitlab
+kube1:~/gitlab-runner# helm search repo -l gitlab/gitlab-runner
+kube1:~/gitlab-runner# helm show values gitlab/gitlab-runner --version 0.70.5 | tee values.yaml
+kube1:~/gitlab-runner# cat values.yaml
+</code><code>
+...
+gitlabUrl: https://server.corpX.un
+...
+runnerToken: "NNNNNNNNNNNNNNNNNNNNN"
+...
+rbac:
+...
+  create: true                      #change this
+...
+serviceAccount:
+...
+  create: true                      #change this
+...
+runners:
+...
+  config: |
+    [[runners]]
+      tls-ca-file = "/mnt/ca.crt"   #insert this
+      [runners.kubernetes]
+        namespace = "{{.Release.Namespace}}"
+        image = "alpine"
+        privileged = true           #insert this
+...
+securityContext:
+  allowPrivilegeEscalation: true    #change this
+  readOnlyRootFilesystem: false
+  runAsNonRoot: true
+  privileged: true                  #change this
+...
+#volumeMounts: []                   #comment this
+volumeMounts:
+  - name: ca-crt
+    subPath: ca.crt
+    mountPath: /mnt/ca.crt
+...
+#volumes: []                        #comment this
+volumes:
+  - name: ca-crt
+    configMap:
+      name: ca-crt
+...
+</code><code>
+kube1:~/gitlab-runner# helm upgrade -i gitlab-runner gitlab/gitlab-runner -f values.yaml -n gitlab-runner --version 0.70.5
+kube1:~/gitlab-runner# kubectl get all -n gitlab-runner
+kube1:~/gitlab-runner# ### helm -n gitlab-runner uninstall gitlab-runner
+</code>
+== старая версия ==
+<code>
+gitlab-runner@server:~$ helm repo add gitlab https://charts.gitlab.io
+gitlab-runner@server:~$ helm repo list
+gitlab-runner@server:~$ helm search repo -l gitlab
-helm search repo -l gitlab/gitlab-runner
+gitlab-runner@server:~$ helm search repo -l gitlab/gitlab-runner
-helm show values gitlab/gitlab-runner | tee values.yaml
+gitlab-runner@server:~$ helm show values gitlab/gitlab-runner --version 0.56.0 | tee values.yaml
 gitlab-runner@server:~$ diff values.yaml values.yaml.orig
@@ Line 1568: / Line 2045: @@
 >   privileged: false
 </code><code>
-gitlab-runner@server:~$ helm upgrade -i gitlab-runner gitlab/gitlab-runner -f values.yaml -n gitlab-runner --create-namespace
+gitlab-runner@server:~$ helm upgrade -i gitlab-runner gitlab/gitlab-runner -f values.yaml -n gitlab-runner --create-namespace --version 0.56.0
 gitlab-runner@server:~$ kubectl get all -n gitlab-runner
-</code><code>
+</code>
-$ helm search hub -o json wordpress | jq '.' | less
-$ helm repo add bitnami https://charts.bitnami.com/bitnami
+== SSL/TLS ==
-$ helm show values bitnami/wordpress
+<code>
+# kubectl -n gitlab-runner create configmap wild-crt --from-file=wild.crt
+# cat values.yaml
+</code><code>
+...
+gitlabUrl: https://server.corpX.un/
+...
+  config: |
+    [[runners]]
+      tls-ca-file = "/mnt/wild.crt"
+      [runners.kubernetes]
+...
+#volumeMounts: []
+volumeMounts:
+  - name: wild-crt
+    subPath: wild.crt
+    mountPath: /mnt/wild.crt
+#volumes: []
+volumes:
+  - name: wild-crt
+    configMap:
+      name: wild-crt
 </code>
@@ Line 1629: / Line 2128: @@
   * http://localhost:8001/api/v1/namespaces/kubernetes-dashboard/services/https:kubernetes-dashboard:/proxy/
+===== Мониторинг =====
+==== Metrics Server ====
+  * [[https://kubernetes-sigs.github.io/metrics-server/Kubernetes Metrics Server]]
+  * [[https://medium.com/@cloudspinx/fix-error-metrics-api-not-available-in-kubernetes-aa10766e1c2f|Fix “error: Metrics API not available” in Kubernetes]]
+<code>
+kube1:~/metrics-server# curl -L https://github.com/kubernetes-sigs/metrics-server/releases/download/v0.7.2/components.yaml | tee metrics-server-components.yaml
+kube1:~/metrics-server# cat metrics-server-components.yaml
+</code><code>
+...
+      containers:
+      - args:
+        - --cert-dir=/tmp
+        - --kubelet-insecure-tls   # add this
+...
+</code><code>
+kube1:~/metrics-server# kubectl apply -f metrics-server-components.yaml
+kube1# kubectl get pods -A | grep metrics-server
+kube1# kubectl top pod #-n kube-system
+kube1# kubectl top pod -A --sort-by=memory
+kube1# kubectl top node
+</code>
+==== kube-state-metrics ====
+  * [[https://github.com/prometheus-community/helm-charts/tree/main/charts/kube-state-metrics]]
+  * ... алерты с инфой по упавшим подам ...
+<code>
+kube1# helm repo add prometheus-community https://prometheus-community.github.io/helm-charts
+kube1# helm repo update
+kube1# helm install kube-state-metrics prometheus-community/kube-state-metrics -n vm --create-namespace
+kube1# curl kube-state-metrics.vm.svc.cluster.local:8080/metrics
+</code>
+===== Отладка, troubleshooting =====
+==== Отладка etcd ====
+  * [[https://sysdig.com/blog/monitor-etcd/|How to monitor etcd]]
+<code>
+kubeN:~# more /etc/kubernetes/manifests/kube-apiserver.yaml
+kubeN:~# etcdctl member list -w table \
+  --endpoints=https://kube1:2379 \
+  --cacert=/etc/ssl/etcd/ssl/ca.pem \
+  --cert=/etc/ssl/etcd/ssl/node-kube1.pem \
+  --key=/etc/ssl/etcd/ssl/node-kube1-key.pem
+kubeN:~# etcdctl endpoint status -w table \
+  --endpoints=https://kube1:2379,https://kube2:2379,https://kube3:2379 \
+  --cacert=/etc/ssl/etcd/ssl/ca.pem \
+  --cert=/etc/ssl/etcd/ssl/node-kube1.pem \
+  --key=/etc/ssl/etcd/ssl/node-kube1-key.pem
+</code>
 ===== Дополнительные материалы =====
+==== Настройка registry-mirrors для Kubespray ====
+<code>
+~/kubespray# cat inventory/mycluster/group_vars/all/docker.yml
+</code><code>
+...
+docker_registry_mirrors:
+  - https://mirror.gcr.io
+...
+</code><code>
+~/kubespray# cat inventory/mycluster/group_vars/all/containerd.yml
+</code><code>
+...
+containerd_registries_mirrors:
+  - prefix: docker.io
+    mirrors:
+    - host: https://mirror.gcr.io
+      capabilities: ["pull", "resolve"]
+      skip_verify: false
+...
+</code>
+==== Установка kubelet kubeadm kubectl в ubuntu20 ====
+  * На каждом узле нужно сделать
+<code>
+mkdir /etc/apt/keyrings
+curl -fsSL https://pkgs.k8s.io/core:/stable:/v1.28/deb/Release.key | sudo gpg --dearmor -o /etc/apt/keyrings/kubernetes-apt-keyring.gpg
+echo 'deb [signed-by=/etc/apt/keyrings/kubernetes-apt-keyring.gpg] https://pkgs.k8s.io/core:/stable:/v1.28/deb/ /' | sudo tee /etc/apt/sources.list.d/kubernetes.list
+apt update && apt install -y kubeadm=1.28.1-1.1 kubelet=1.28.1-1.1 kubectl=1.28.1-1.1
+</code>
+==== Use .kube/config Client certs in curl ====
+  * [[https://serverfault.com/questions/1094361/use-kube-config-client-certs-in-curl|Use .kube/config Client certs in curl]]
+<code>
+cat ~/.kube/config | yq -r '.clusters[0].cluster."certificate-authority-data"' | base64 -d - > ~/.kube/ca.pem
+cat ~/.kube/config | yq -r '.users[0].user."client-certificate-data"' | base64 -d - > ~/.kube/user.pem
+cat ~/.kube/config | yq -r '.users[0].user."client-key-data"' | base64 -d - > ~/.kube/user-key.pem
+SERVER_URL=$(cat ~/.kube/config | yq -r .clusters[0].cluster.server)
+curl --cacert ~/.kube/ca.pem --cert ~/.kube/user.pem --key ~/.kube/user-key.pem -X GET  ${SERVER_URL}/api/v1/namespaces/default/pods/
+</code>
 ==== bare-metal minikube ====

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