How to disable mysql strict mode in kubernetes?-CodePudding

I wanted to create a MySQL container in Kubernetes with default disabled strict mode. I know the way of how to disable strict mode in docker. I tried to use the same way in Kubernetes, but it shows an errors log.

docker

docker container run -t -d --name hello-wordl mysql --sql-mode=""

kubernetes

apiVersion: apps/v1
kind: Deployment
metadata:
  name: my-db
  labels:
    app: db
spec:
  selector:
    matchLabels:
      app: db
  template:
    metadata:
      name: my-db
      labels:
        app: db
    spec:
      containers:
      - name: my-db
        image: mariadb
        imagePullPolicy: Always
        args: ["--sql-mode=\"\""]

error:

2021-10-29 08:20:57 00:00 [Note] [Entrypoint]: Entrypoint script for MariaDB Server 1:10.2.40 maria~bionic started. 2021-10-29 08:20:57 00:00 [ERROR] [Entrypoint]: mysqld failed while attempting to check config command was: mysqld --sql-mode="" --verbose --help --log-bin-index=/tmp/tmp.i8yL5kgKoq 2021-10-29 8:20:57 140254859638464 [ERROR] mysqld: Error while setting value '""' to 'sql_mode'

CodePudding user response：

Based on the error you're getting, it is reading the double quotes as value to sql_mode. You should omit the escaped double-quotes.

args: ["--sql-mode="]

CodePudding user response：

It seems you have to use a configmap for this.
Configmap manifest:

apiVersion: v1
kind: ConfigMap
metadata:
  name: mysql-config
  labels:
    app: mysql
data:
  my.cnf: |-
    [client]
    default-character-set=utf8mb4
    [mysql]
    default-character-set=utf8mb4
    [mysqld] 
    max_connections = 2000
    secure_file_priv=/var/lib/mysql
    sql_mode=STRICT_TRANS_TABLES

Deployment Manifest : in Volume section

    volumeMounts:
    - name: data
      mountPath: /var/lib/mysql
    - name: config
      mountPath: /etc/mysql/conf.d/my.cnf
      subPath: my.cnf

  volumes:
  - name: config      
    configMap:
    name: mysql-config

This will replace your default my.conf in MySQL container, if you need to set more variables, better to include them in the configmap
For more detailed answer