execute MySQL init command using environment variables to create database

5/18/2018

I'm trying to create a database if it does not exist and set privledges but I'm having trouble getting it to work, I keep getting You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'DEFAULT CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci' at line 1

I've included the various ways I've tried to execute the commands

Yaml:

  initContainers:
  - name: database-setup
    image: mysql:5.7
    imagePullPolicy: IfNotPresent
    # command:  ["rm", "-fr", "/var/lib/mysql/lost+found"]
    # SQL Syntax error:
    command: [sh,-c,mysql -h mysql-service -p$MYSQL_ROOT_PASSWORD -e "CREATE DATABASE IF NOT EXISTS `$WORDPRESS_DB_NAME` DEFAULT CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci; GRANT ALL PRIVILEGES ON $WORDPRESS_DB_NAME.* TO '$WORDPRESS_DB_USER'@'%' IDENTIFIED BY '$WORDPRESS_DB_PASSWORD'; FLUSH PRIVILEGES;"]

      # Enviroment Variables arn't passed into mysql shell:
      # - sh
      # - -c
      # - mysql -h mysql-service -p$MYSQL_ROT_PASSWORD
      # - CREATE DATABASE IF NOT EXISTS $WORDPRESS_DB_NAME DEFAULT CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci;
      # - GRANT ALL PRIVILEGES ON $WORDPRESS_DB_NAME.* TO '$WORDPRESS_DB_USER'@'%' IDENTIFIED BY '$WORDPRESS_DB_PASSWORD';
      # - FLUSH PRIVILEGES;
      # - EXIT;

      # SQL Syntax error:
      # - sh
      # - -c
      # - mysql -h mysql-service -p$MYSQL_ROOT_PASSWORD -e "CREATE DATABASE IF NOT EXISTS `$WORDPRESS_DB_NAME` DEFAULT CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci; GRANT ALL PRIVILEGES ON $WORDPRESS_DB_NAME.* TO '$WORDPRESS_DB_USER'@'%' IDENTIFIED BY '$WORDPRESS_DB_PASSWORD'; FLUSH PRIVILEGES;

    env:
    - name: WORDPRESS_DB_NAME
      value: wordpress-green
    - name: WORDPRESS_DB_USER
      value: wordpress-green
    - name: WORDPRESS_DB_PASSWORD
      valueFrom:
        secretKeyRef:
          name: wordpress-mysql-pass
          key: wordpress-mysql-pass
    - name: MYSQL_ROOT_PASSWORD
      valueFrom:
        secretKeyRef:
          name: mysql-root-pass
          key: mysql-root-pass
-- Nathan Ogden
kubernetes
mysql

1 Answer

5/18/2018

tried doing an echo for the MySQL line to debug the variables returned:

mysql -h mysql-service -p\\REDACTED\\ -e CREATE DATABASE IF NOT EXISTS DEFAULT CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci; GRANT ALL PRIVILEGES ON wordpress-green.* TO 'wordpress-green'@'%' IDENTIFIED BY '\\REDACTED\\'; FLUSH PRIVILEGES;

I fixed the $WORDPRESS_DB_NAME not being passed to the create DB sting by removing the `` - this caused SQL Syntax error again because it does not like a dash in the database name. Instead I just used camelCase for the database name

Thanks for the help @Tim Biegeleisen

-- Nathan Ogden
Source: StackOverflow