KubeZero/charts/kubezero-auth/docs/postgres.md

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# Upgrade Postgres major version
## backup
- shell into running posgres-auth pod
```
export PGPASSWORD="<postgres_password from secret>"
cd /bitnami/posgres
pg_dumpall > backup
```
- store backup off-site
```
kubectl cp keycloak/kubezero-auth-postgresql-0:/bitnami/postgresql/backup postgres-backup
```
## upgrade
- upgrade auth chart
- delete postgres-auth PVC and POD to flush old DB
## restore
- copy backup to new PVC
```
kubectl cp postgres-backup keycloak/kubezero-auth-postgresql-0:/bitnami/postgresql/backup
```
- log into psql as admin ( shell on running pod )
```
psql -U postgres
```
- drop database `keycloak`
```
DROP database keycloak
```
if keycloak is running and postgres complains about connected users simply kill the keycloak and retry
- actual restore
```
psql -U postgres -d postgres -f backup
```
- restart keycloak once more
success.