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BITNAMI MYSQL STACK HELM CHARTS

Links

Helm: https://bitnami.com/stack/mysql/helm
Helm Source: https://github.com/bitnami/charts/tree/master/bitnami/mysql/#installing-the-chart

Docker: https://hub.docker.com/r/bitnami/mysql
Docker Source: https://github.com/bitnami/bitnami-docker-mysql

Add Helm Repo

helm repo list
helm repo add bitnami https://charts.bitnami.com/bitnami

Create a values file

Default values here: https://github.com/bitnami/charts/blob/master/bitnami/mysql/values.yaml

Create a local one to override some values:
mysql/software-tracker-db.yaml

There will be a root user created with password.
Another user toladmin created with password, which values will be set in the command line.
And also a readonly user tol.

How to trigger additional initial SQL in Kubernetes

The sqls added to the values as initdbScripts.

Install the services

k create ns tol-software-tracking (if not created yet)
k config set-context --current --namespace=tol-software-tracking

# Add password value when you run
helm install software-tracker-db-tol bitnami/mysql -f mysql/software-tracker-db.yaml \
--set "auth.username=toladmin" \
--set "auth.password= " \
--dry-run

# Add password value when you run
helm install software-tracker-db-tol bitnami/mysql -f mysql/software-tracker-db.yaml \
--set "auth.username=toladmin" \
--set "auth.password= " \

# retrieve root password
MYSQL_ROOT_PASSWORD=$(kubectl get secret --namespace tol-software-tracking software-tracker-db-tol-mysql -o jsonpath="{.data.mysql-root-password}" | base64 --decode)

# retrieve non root password
MYSQL_ROOT_PASSWORD=$(kubectl get secret --namespace tol-software-tracking software-tracker-db-tol-mysql -o jsonpath="{.data.mysql-password}" | base64 --decode)

# upgrade
ROOT_PASSWORD=$(kubectl get secret --namespace tol-software-tracking software-tracker-db-tol-mysql -o jsonpath="{.data.mysql-root-password}" | base64 --decode)
helm upgrade --namespace tol-software-tracking software-tracker-db-tol bitnami/mysql --set auth.rootPassword=$ROOT_PASSWORD

helm uninstall software-tracker-db-tol
k delete pvc data-tracker-db-mysql-0

Notes from Helm Installation


CHART NAME: mysql
CHART VERSION: 8.9.6
APP VERSION: 8.0.29

** Please be patient while the chart is being deployed **

Tip:

  Watch the deployment status using the command: kubectl get pods -w --namespace tol-software-tracking

Services:

  echo Primary: software-tracker-db-tol-mysql.tol-software-tracking.svc.cluster.local:3306

Execute the following to get the administrator credentials:

  echo Username: root
  MYSQL_ROOT_PASSWORD=$(kubectl get secret --namespace tol-software-tracking software-tracker-db-tol-mysql -o jsonpath="{.data.mysql-root-password}" | base64 --decode)

To connect to your database:

  1. Run a pod that you can use as a client:

      kubectl run software-tracker-db-tol-mysql-client --rm --tty -i --restart='Never' --image  docker.io/bitnami/mysql:8.0.29-debian-10-r2 --namespace tol-software-tracking --env MYSQL_ROOT_PASSWORD=$MYSQL_ROOT_PASSWORD --command -- bash

  2. To connect to primary service (read/write):

      mysql -h software-tracker-db-tol-mysql.tol-software-tracking.svc.cluster.local -uroot -p"$MYSQL_ROOT_PASSWORD"



To upgrade this helm chart:

  1. Obtain the password as described on the 'Administrator credentials' section and set the 'root.password' parameter as shown below:

      ROOT_PASSWORD=$(kubectl get secret --namespace tol-software-tracking software-tracker-db-tol-mysql -o jsonpath="{.data.mysql-root-password}" | base64 --decode)
      helm upgrade --namespace tol-software-tracking software-tracker-db-tol bitnami/mysql --set auth.rootPassword=$ROOT_PASSWORD

Dev and Prod envirorments

We use the same setting for Dev and Prod envirorments, jsut switch the Kubernetes cluster and do Helm installation.