Fix postgresql schema

[medamineamara]

What was changed

Add kubernetes job to support database schema migration and updates on PostgreSQL.

Why?

Current workplace uses a Bring Your Own PostgreSQL and having this change upstream would be simple for more people.

Checklist

1. Closes [Feature Request] Add Kubernetes job to migrate postgresql schema #349

2. How was this tested:

Deployed Postgresql helm chart then deployed Temporal helm
Complete logs :

amine@amine-Latitude-5420:~/Work/Temporal-helm-charts$ helm -n temporal ls
WARNING: Kubernetes configuration file is group-readable. This is insecure. Location: /home/amine/.kube/config
NAME      	NAMESPACE	REVISION	UPDATED                                	STATUS  	CHART            	APP VERSION
postgresql	temporal 	1       	2023-04-06 10:40:28.211826433 +0000 UTC	deployed	postgresql-12.1.6	15.1.0     


amine@amine-Latitude-5420:~/Work/Temporal-helm-charts$ helm -n temporal install -f temporal-values.yml temporal .
WARNING: Kubernetes configuration file is group-readable. This is insecure. Location: /home/amine/.kube/config
NAME: temporal
LAST DEPLOYED: Tue May 16 21:50:23 2023
NAMESPACE: temporal
STATUS: deployed
REVISION: 1
TEST SUITE: None
NOTES:
To verify that Temporal has started, run:

  kubectl --namespace=temporal get pods -l "app.kubernetes.io/instance=temporal"



amine@amine-Latitude-5420:~/Work/Temporal-helm-charts$ k -n temporal get pods
NAME                                   READY   STATUS      RESTARTS   AGE
postgresql-0                           1/1     Running     0          40d
temporal-admintools-6ff979d5fb-z5dwr   1/1     Running     0          98s
temporal-frontend-79fc54b7db-mknsd     1/1     Running     0          98s
temporal-history-dd6467bb7-jpt62       1/1     Running     0          98s
temporal-matching-5689b4b4f9-j4bsm     1/1     Running     0          98s
temporal-schema-setup-lzh9n            0/2     Completed   0          2m14s
temporal-schema-update-rlcrm           0/2     Completed   0          108s
temporal-web-fcbfff8c6-cvktl           1/1     Running     0          98s
temporal-worker-7b47ff8568-2xtdk       1/1     Running     0          98s


amine@amine-Latitude-5420:~/Work/Temporal-helm-charts$ helm -n temporal get values temporal
WARNING: Kubernetes configuration file is group-readable. This is insecure. Location: /home/amine/.kube/config
USER-SUPPLIED VALUES:
cassandra:
  enabled: false
debug: true
elasticsearch:
  enabled: false
grafana:
  enabled: false
postgresql:
  enabled: false
  image:
    pullPolicy: IfNotPresent
    repo: postgres
    tag: 15.1
prometheus:
  enabled: false
server:
  config:
    persistence:
      default:
        driver: sql
        sql:
          database: temporal
          driver: postgres
          host: postgresql.temporal.svc.cluster.local
          maxConnLifetime: 1h
          maxConns: 20
          password: ********** # Masked password
          port: 5432
          user: postgres
      visibility:
        driver: sql
        sql:
          database: temporal_visibility
          driver: postgres
          host: postgresql.temporal.svc.cluster.local
          maxConnLifetime: 1h
          maxConns: 20
          password: ********** # Masked password
          port: 5432
          user: postgres
  replicaCount: 1
web:
  image:
    tag: 2.12.0


amine@amine-Latitude-5420:~/Work/Temporal-helm-charts$ k logs temporal-schema-update-rlcrm -n temporal
Defaulted container "default-schema-update" out of: default-schema-update, visibility-schema-update, check-postgresql-service (init), check-postgresql (init)
2023-05-16T19:50:58.561Z	INFO	UpdateSchemeTask started	{"config": {"DBName":"","TargetVersion":"","SchemaDir":"./schema/postgresql/v96/temporal/versioned","IsDryRun":false}, "logging-call-at": "updatetask.go:98"}
2023-05-16T19:50:58.566Z	DEBUG	Schema Dirs: []	{"logging-call-at": "updatetask.go:187"}
2023-05-16T19:50:58.567Z	DEBUG	found zero updates from current version 1.9	{"logging-call-at": "updatetask.go:128"}
2023-05-16T19:50:58.567Z	INFO	UpdateSchemeTask done	{"logging-call-at": "updatetask.go:121"}

3. Any docs updates needed?

I think that in the readme the part where schema setup and update for postgresql should be removed
https://github.com/temporalio/helm-charts#install-with-your-own-postgresql

It's an extension of this PL #350

[CLAassistant]

All committers have signed the CLA.

[medamineamara]

I found a far more better approach
#281

[brandonros]

similar to #350 and #281 i'm pretty sure, probably #275 too