helm repo add bitnami https://charts.bitnami.com/bitnami
helm repo update && helm repo list
Config
export KUBECONFIG="${HOME}/.kube/dev-kubeconfig.yaml"
export KUBECONFIG="${HOME}/.kube/gcp-kubeconfig.yaml"
export KUBECONFIG="${HOME}/.kube/config"
Install
helm show values bitnami/postgresql --version=15.5.20|less
helm show values bitnami/postgresql --version=15.5.21|less
|
kubectl get ns|grep postgresql
kubectl delete ns postgresql
|
kubectl get ns|grep postgresql
kubectl create ns postgresql
|
|
cat <<YML | helm -n postgresql install postgresql bitnami/postgresql --version=15.5.21 -f -
---
global:
storageClass: standard
postgresql:
auth:
postgresPassword: sadaqah!
username: academia
password: sadaqah!
database: academia
primary:
initdb:
scripts:
init-chorke.sql: |
-- create database
CREATE DATABASE academia_flair_staging;
CREATE DATABASE academia_audit_staging;
CREATE DATABASE academia_quote_staging;
CREATE DATABASE academia_users_staging;
-- create user
CREATE USER chorke WITH ENCRYPTED PASSWORD 'sadaqah!';
ALTER USER chorke WITH SUPERUSER;
-- grant access
GRANT ALL PRIVILEGES ON DATABASE academia_flair_staging TO chorke;
GRANT ALL PRIVILEGES ON DATABASE academia_audit_staging TO chorke;
GRANT ALL PRIVILEGES ON DATABASE academia_quote_staging TO chorke;
GRANT ALL PRIVILEGES ON DATABASE academia_users_staging TO chorke;
YML
|
|
psql -h psql.k8s.local -p 5432 -U academia academia
psql -h psql.k8s.local -p 5432 -U postgres postgres
|
psql 'postgres://academia:@psql.k8s.local:5432/academia'
psql 'postgres://postgres:@psql.k8s.local:5432/postgres'
|
|
AWS » EC2 » Volumes
cat << YML | kubectl apply -f -
---
apiVersion: v1
kind: PersistentVolume
metadata:
name: pv-postgresql-postgresql
spec:
accessModes:
- ReadWriteOnce
awsElasticBlockStore:
fsType: ext4
volumeID: aws://ap-southeast-1/vol-0bbbd80804f1ae62a
capacity:
storage: 10Gi
persistentVolumeReclaimPolicy: Retain
storageClassName: "gp2"
---
apiVersion: v1
kind: PersistentVolumeClaim
metadata:
labels:
app.kubernetes.io/name: postgresql
name: pvc-postgresql-postgresql
namespace: postgresql
spec:
accessModes:
- ReadWriteOnce
resources:
requests:
storage: 10Gi
storageClassName: "gp2"
volumeName: pv-postgresql-postgresql
YML
AWS » Patch
kubectl -n postgresql get sts/postgresql -ojson|jq -r '.spec.template.spec.nodeSelector'
|
|
cat <<YML | kubectl -n postgresql patch sts/postgresql --patch-file=/dev/stdin
---
spec:
template:
spec:
nodeSelector:
topology.kubernetes.io/zone: minikube
YML
|
cat <<YML | kubectl -n postgresql patch sts/postgresql --patch-file=/dev/stdin
---
spec:
template:
spec:
nodeSelector:
topology.kubernetes.io/zone: ap-southeast-1a
YML
|
|
kubectl -n postgresql get sts/postgresql -ojson|jq -r '.spec.template.spec.nodeSelector'
kubectl -n postgresql delete pods --all
|
Uninstall
helm uninstall -n postgresql postgresql
kubectl delete namespace postgresql
Swiss Knife
kubectl -n postgresql run -i --tty --rm psql --image=alpine --restart=Never -- sh
apk --update add postgresql-client inetutils-telnet
psql -d postgres -U postgres -h postgresql.postgresql.svc.cluster.local
psql -d postgres -U postgres -h postgresql.postgresql.svc
psql -d postgres -U postgres -h postgresql.postgresql
psql -d postgres -U postgres -h postgresql
Playground
helm -n postgresql install postgresql bitnami/postgresql --version=15.5.20
helm -n postgresql upgrade -i postgresql bitnami/postgresql --version=15.5.21
helm show values bitnami/postgresql --version=15.5.21|less
|
|
kubectl -n postgresql get secret postgresql -o json|jq -r '.data."postgres-password"'|base64 -d;echo
kubectl -n postgresql get secret postgresql -o json|jq -r '.data.password'|base64 -d;echo
kubectl -n postgresql exec -it svc/postgresql -c postgresql -- psql -Upostgres
kubectl -n postgresql exec -it svc/postgresql -c postgresql -- bash
kubectl -n postgresql exec -it svc/postgresql -- psql -Upostgres
|
|
kubectl config --kubeconfig=${HOME}/.kube/aws-kubeconfig.yaml view --flatten
kubectl config --kubeconfig=${HOME}/.kube/dev-kubeconfig.yaml view --flatten
kubectl config --kubeconfig=${HOME}/.kube/gcp-kubeconfig.yaml view --flatten
kubectl config --kubeconfig=${HOME}/.kube/config view --flatten
|
|
kubectl -n postgresql delete all --all
kubectl -n postgresql delete ing --all
kubectl -n postgresql delete sts --all
|
kubectl -n postgresql delete svc --all
kubectl -n postgresql delete pvc --all
kubectl -n postgresql delete pv --all
|
|
kubectl -n postgresql rollout history sts postgresql
kubectl -n postgresql rollout restart sts postgresql
kubectl -n postgresql rollout status sts postgresql
|
kubectl -n postgresql exec -it postgresql-0 -- psql -Upostgres
kubectl -n postgresql logs -f svc/postgresql -c postgresql
kubectl -n postgresql logs -f svc/postgresql
|
References