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root@gate.corp13.un:~# curl -LO https://storage.googleapis.com/kubernetes-release/release/`curl -s https://storage.googleapis.com/kubernetes-release/release/stable.txt`/bin/linux/amd64/kubectl root@gate.corp13.un:~# chmod +x kubectl root@gate.corp13.un:~# mv kubectl /usr/local/bin/ student@node2:~$ tar zcf kube-config.tar.gz .kube/config .minikube/ca.crt .minikube/profiles/minikube gitlab-runner@gate:~$ scp student@node2:kube-config.tar.gz . gitlab-runner@gate:~$ tar -xvf kube-config.tar.gz gitlab-runner@gate:~$ cat .kube/config
... certificate-authority: /home/gitlab-runner/.minikube/ca.crt ... client-certificate: /home/gitlab-runner/.minikube/profiles/minikube/client.crt client-key: /home/gitlab-runner/.minikube/profiles/minikube/client.key ...
gitlab-runner@gate:~$ kubectl get all
student@node3:~$ minikube delete student@node3:~$ minikube start --driver=docker --insecure-registry "server.corp13.un:5000" ИЛИ
student@node2:~$ sudo apt install conntrack https://computingforgeeks.com/install-mirantis-cri-dockerd-as-docker-engine-shim-for-kubernetes/ ... wget https://github.com/kubernetes-sigs/cri-tools/releases/download/v1.24.2/crictl-v1.24.2-linux-amd64.tar.gz ... student@node2:~$ minikube start --driver=none --insecure-registry "server.corp13.un:5000"
student@node3:~$ minikube status student@node3:~$ minikube ip student@node3:~$ minikube addons list student@node3:~$ minikube addons configure registry-creds ... Do you want to enable Docker Registry? [y/n]: y -- Enter docker registry server url: http://server.corp13.un:5000 -- Enter docker registry username: student -- Enter docker registry password: ... student@node3:~$ minikube addons enable registry-creds student@node3:~$ minikube dashboard & ... Opening http://127.0.0.1:NNNNN/api/v1/namespaces/kubernetes-dashboard/services/http:kubernetes-dashboard:/proxy/ in your default browser ... /home/mobaxterm> ssh -L NNNNN:localhost:NNNNN student@192.168.13.230 Теперь, та же ссылка работает на win host системе
$ kubectl create deployment my-debian --image=debian -- "sleep" "3600" $ kubectl get all $ kubectl get deployments $ kubectl get pods $ kubectl attach my-debian-NNNNNNNNN-NNNNN $ kubectl exec -ti my-debian-NNNNNNNNN-NNNNN -- bash Ctrl-D $ kubectl get deployment my-debian -o yaml $ kubectl edit deployment my-debian $ kubectl delete deployment my-debian
[[https://kubernetes.io/docs/reference/glossary/?all=true#term-manifest| Kubernetes Documentation Reference Glossary/Manifest]]
$ cat my-debian-deployment.yaml
apiVersion: apps/v1 kind: Deployment metadata: name: my-debian spec: selector: matchLabels: app: my-debian template: metadata: labels: app: my-debian spec: containers: - name: my-debian image: debian command: ["/bin/sh"] args: ["-c", "while true; do echo hello; sleep 3;done"] restartPolicy: Always
$ kubectl create -f my-debian-deployment.yaml ... $ kubectl delete -f my-debian-deployment.yaml
$ kubectl create namespace my-ns $ kubectl get namespaces $ ### kubectl create deployment my-webd --image=server.corp13.un:5000/student/webd:latest --replicas=2 -n my-ns $ cat my-webd-deployment.yaml
apiVersion: apps/v1 kind: Deployment metadata: name: my-webd namespace: my-ns spec: selector: matchLabels: app: my-webd replicas: 2 template: metadata: labels: app: my-webd spec: containers: - name: my-webd image: server.corp13.un:5000/student/webd:latest
$ kubectl apply -f my-webd-deployment.yaml $ kubectl get all -n my-ns $ kubectl scale deployment my-webd --replicas=3 -n my-ns
$ ### kubectl expose deployment my-webd --type=NodePort --port=80 -n my-ns $ cat my-webd-service.yaml
apiVersion: v1 kind: Service metadata: name: my-webd namespace: my-ns spec: type: NodePort selector: app: my-webd ports: - protocol: TCP port: 80 targetPort: 80 status: loadBalancer: {}
$ kubectl apply -f my-webd-service.yaml $ kubectl get svc my-webd -n my-ns NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE my-webd-svc NodePort 10.102.135.146 <none> 80:30350/TCP 18h student@node3:~$ minikube service my-webd -n my-ns --url http://192.168.49.2:30350 student@node3:~$ curl $(minikube service my-webd -n my-ns --url)
student@node2:~$ minikube addons enable ingress gitlab-runner@gate:~/webd$ cat my-webd-ingress.yaml
apiVersion: networking.k8s.io/v1 kind: Ingress metadata: name: my-webd namespace: my-ns annotations: nginx.ingress.kubernetes.io/rewrite-target: /$1 spec: rules: - host: webd.corp13.un http: paths: - path: /(.*) pathType: Prefix backend: service: name: my-webd port: number: 80
$ kubectl apply -f my-webd-ingress.yaml $ kubectl get ingress -n my-ns root@gate.corp13.un:~# host webd webd.corp13.un is an alias for node2.corp13.un. node2.corp13.un has address 192.168.13.220 $ curl webd.corp13.un $ kubectl logs -l app=my-webd -n my-ns
$ kubectl delete -n my-ns -f my-webd-deployment.yaml,my-webd-service.yaml,my-webd-ingress.yaml или $ kubectl delete namespace my-ns
$ cat my-webd-nfs-deployment.yaml ... spec: containers: - name: my-webd image: server.corp13.un:5000/student/webd:latest volumeMounts: - name: nfs-volume mountPath: /var/www volumes: - name: nfs-volume nfs: server: 192.168.13.1 path: /var/www
gitlab-runner@gate:~/webd$ cat my-webd-ssh-deployment.yaml
apiVersion: apps/v1 kind: Deployment metadata: name: my-webd-ssh namespace: my-ns spec: selector: matchLabels: app: my-webd-ssh replicas: 1 template: metadata: labels: app: my-webd-ssh spec: containers: - name: my-webd image: server.corp13.un:5000/student/webd:latest volumeMounts: - name: html mountPath: /var/www - name: my-ssh image: atmoz/sftp args: ["user3:password3:10003"] volumeMounts: - name: html mountPath: /home/user3/www volumes: - name: html emptyDir: {}
... $ kubectl describe pod my-webd-NNNNNNNNNN-NNNNN -n my-ns $ kubectl exec -ti -n my-ns my-webd-NNNNNNNNNN-NNNNN -c my-ssh -- bash $ ### kubectl expose deployment my-webd-ssh --type=NodePort --port=80,22 -n my-ns $ cat my-webd-ssh-service.yaml
apiVersion: v1 kind: Service metadata: name: my-webd-ssh namespace: my-ns spec: type: NodePort selector: app: my-webd-ssh ports: - name: http protocol: TCP port: 80 targetPort: 80 - name: ssh protocol: TCP port: 22 targetPort: 22
$ wget https://get.helm.sh/helm-v3.9.0-linux-amd64.tar.gz $ tar -zxvf helm-v3.9.0-linux-amd64.tar.gz $ sudo mv linux-amd64/helm /usr/local/bin/helm
$ helm create webd-chart $ cat webd-chart/Chart.yaml
... appVersion: "latest"
$ cat webd-chart/values.yaml
... image: repository: server.corp13.un:5000/student/webd pullPolicy: Always ... nameOverride: "webd-app" fullnameOverride: "webd-chart" ... serviceAccount: create: false ... service: type: NodePort ... ingress: enabled: true ... hosts: - host: webd.corp13.un ...
$ less webd-chart/templates/deployment.yaml
... image: "{{ .Values.image.repository }}:{{ .Values.image.tag | default .Chart.AppVersion }}" ...
!!! Был замечен "глюк" DNS, из-за которого не загружался Docker образ, который "лечился" предварительным созданием namespace $ helm install my-webd-chart webd-chart/ --n my-ns --create-namespace --wait $ export HELM_NAMESPACE=my-ns $ helm list $ helm upgrade my-webd-chart webd-chart/ --set=image.tag=ver1.10 $ helm history my-webd-chart $ helm rollback my-webd-chart 1 $ helm uninstall my-webd-chart
$ helm search hub -o json wordpress | jq '.' | less $ helm repo add bitnami https://charts.bitnami.com/bitnami $ helm repo list $ helm show values bitnami/wordpress
root@gate.corp13.un:~# curl -L https://github.com/kubernetes/kompose/releases/download/v1.26.0/kompose-linux-amd64 -o kompose root@gate.corp13.un:~# chmod +x kompose root@gate.corp13.un:~# sudo mv ./kompose /usr/local/bin/kompose
gitlab-runner@gate:~/webd$ kompose convert gitlab-runner@gate:~/webd$ ls *yaml gitlab-runner@gate:~/webd$ kubectl apply -f sftp-deployment.yaml,vol1-persistentvolumeclaim.yaml,webd-service.yaml,sftp-service.yaml,webd-deployment.yaml gitlab-runner@gate:~/webd$ kubectl get all