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сервис_postgresql
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| Both sides previous revision Previous revision Next revision | Previous revision | ||
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сервис_postgresql [2025/10/28 08:35] val [Клиент psql] |
сервис_postgresql [2026/06/11 11:11] (current) val [Kubernetes] |
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| ==== Kubernetes ==== | ==== Kubernetes ==== | ||
| - | * Как не надо делать: [[https://www.digitalocean.com/community/tutorials/how-to-deploy-postgres-to-kubernetes-cluster]] | + | * Как не надо делать (уже исправили, но, комментарии остались:) [[https://www.digitalocean.com/community/tutorials/how-to-deploy-postgres-to-kubernetes-cluster]] |
| === Helm === | === Helm === | ||
| Line 28: | Line 28: | ||
| * Dynamic Volume Provisioning [[Система Kubernetes#longhorn]] | * Dynamic Volume Provisioning [[Система Kubernetes#longhorn]] | ||
| + | * !!! Поменять repository и allowInsecureImages по аналогии Keycloak в [[Сервис Keycloak#Kubernetes]] | ||
| <code> | <code> | ||
| kube1:~/my-postgres# helm show values oci://registry-1.docker.io/bitnamicharts/postgresql --version 16.6.2 | tee values.yaml.orig | kube1:~/my-postgres# helm show values oci://registry-1.docker.io/bitnamicharts/postgresql --version 16.6.2 | tee values.yaml.orig | ||
| Line 62: | Line 63: | ||
| kube1:~# kubectl -n cnpg-system get all | kube1:~# kubectl -n cnpg-system get all | ||
| + | |||
| + | kube1:~# mkdir my-pgcluster; cd $_ | ||
| kube1:~/my-pgcluster# echo -n keycloak | base64 | kube1:~/my-pgcluster# echo -n keycloak | base64 | ||
| Line 95: | Line 98: | ||
| </code><code> | </code><code> | ||
| kube1:~/my-pgcluster# kubectl create ns my-pgcluster-ns | kube1:~/my-pgcluster# kubectl create ns my-pgcluster-ns | ||
| + | </code> | ||
| + | * [[Система Kubernetes#Kustomize]] | ||
| + | <code> | ||
| kube1:~/my-pgcluster# kubectl -n my-pgcluster-ns apply -f keycloak-db-secret.yaml,my-pgcluster.yaml | kube1:~/my-pgcluster# kubectl -n my-pgcluster-ns apply -f keycloak-db-secret.yaml,my-pgcluster.yaml | ||
| - | + | </code> | |
| - | kube1# watch kubectl -n my-pgcluster-ns get all | + | == Проверка состояния кластера cnpg == |
| - | + | <code> | |
| - | kube1# ###kubectl -n my-pgcluster-ns exec -it pod/my-pgcluster-1 -- psql | + | kube1:~/my-pgcluster# kubectl -n my-pgcluster-ns get cluster |
| + | NAME AGE INSTANCES READY STATUS PRIMARY | ||
| + | ... | ||
| + | </code> | ||
| + | == Подключение к кластеру cnpg == | ||
| + | <code> | ||
| + | kube1# kubectl -n my-pgcluster-ns exec -it pod/my-pgcluster-1 -- psql | ||
| kube1# ###psql postgres://keycloak:strongpassword@my-pgcluster-rw.my-pgcluster-ns:5432/keycloak | kube1# ###psql postgres://keycloak:strongpassword@my-pgcluster-rw.my-pgcluster-ns:5432/keycloak | ||
| Line 113: | Line 124: | ||
| kube1:~# kubectl cnpg status my-pgcluster -n my-pgcluster-ns | kube1:~# kubectl cnpg status my-pgcluster -n my-pgcluster-ns | ||
| + | |||
| + | kube1:~# kubectl cnpg promote -n my-pgcluster-ns my-pgcluster my-pgcluster-1 | ||
| kube1:~# kubectl cnpg logs cluster my-pgcluster -n my-pgcluster-ns | kube1:~# kubectl cnpg logs cluster my-pgcluster -n my-pgcluster-ns | ||
| + | </code> | ||
| + | == Миграция с вышедшего из строя узла == | ||
| + | <code> | ||
| + | kube2:~# kubectl -n my-pgcluster-ns get pods | ||
| + | ... | ||
| + | my-pgcluster-3 0/1 Pending 0 80m | ||
| + | |||
| + | kube2# kubectl -n my-pgcluster-ns delete pvc my-pgcluster-3 | ||
| + | |||
| + | kube2# kubectl -n my-pgcluster-ns delete pods/my-pgcluster-3 | ||
| </code> | </code> | ||
| ===== Клиент psql ===== | ===== Клиент psql ===== | ||
| Line 189: | Line 212: | ||
| server# systemctl restart postgresql | server# systemctl restart postgresql | ||
| - | client$ psql postgres://postgres:strongpassword@IP_OR_DNS_NAME:5432/postgres #-c "\dt" | + | client$ psql postgres://postgres:strongpassword@IP_OR_DNS_NAME:5432/postgres |
| + | |||
| + | root@my-debian:~# psql postgres://keycloak:strongpassword@my-pgcluster-rw.my-pgcluster-ns:5432/keycloak -c "\dt" | ||
| + | |||
| + | kube1:~# host my-pgcluster-rw.my-pgcluster-ns.svc.cluster.local 169.254.25.10 | ||
| + | |||
| + | kube1:~# telnet 10.233.N.M 5432 | ||
| </code> | </code> | ||
сервис_postgresql.1761629729.txt.gz · Last modified: 2025/10/28 08:35 by val
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