How To Move WordPress Site To Kubernetes Cluster

a. Create backups of source files and database

  - Logon to Current Hosting Provider to make backups
  - Files:
    - Assuming cPanel:
      - Login to cPanel
      - Click on 'File Manager'
      - Select public_html or the directory containing WordPress files
      - Select Compress from the top-right menu
      - Select 'Bzip2ed Tar Archive' (better compression than Gzip)
      - Click 'Compress File(s)' and wait for the process to finish
      - Right-click the newly generated public_html.tar.bz2 from cPanel File Manager > select Download
      - Find the file in a default download directory (e.g. /home/$(whoami)/Downloads/public_html.tar.bz2)
  - Database:
    - Assuming cPanel with phpMyAdmin
      - Click 'phpMyAdmin' from the 'DATABASES' control group
      - Click 'Export'
      - Set Export method = Quick, Format = Custom
      - Click Go
      - Find the *.sql file being downloaded into a default download directory (e.g. /home/$(whoami)/Downloads/localhost.sql)

b. Install Bitnami WordPress in a Kubernetes Cluster

# Add helm chart if not already available
helm repo add bitnami https://charts.bitnami.com/bitnami

# Install WordPress with Dynamic NFS Provisioning
# Documentation: https://hub.kubeapps.com/charts/bitnami/wordpress/10.0.1
# Set variables
appName=kimconnectblog
domainName=blog.kimconnect.com
wordpressusername=kimconnect
wordpressPassword=SOMEPASSWORDHERE
rootPassword=SOMEPASSWORDHERE2
storageClass=nfs-client
# Install
helm install $appName bitnami/wordpress \
  --set persistence.accessMode=ReadWriteMany,persistence.storageClass=nfs-client \
  --set mariadb.primary.persistence.storageClass=nfs-client \
  --set wordpressUsername=$wordpressusername,wordpressPassword=$wordpressPassword \
  --set mariadb.auth.rootPassword=$rootPassword \
  --set mariadb.auth.password=$rootPassword \
  --set ingress.enabled=true,ingress.hostname=$domainName
# Patch the deployed ingress with an existing SSL cert
# Assuming the $appName-cert has already been generated
appName=kimconnectblog
domainName=blog.kimconnect.com
certName=$appName-cert
serviceName=$appName-wordpress
servicePort=80
cat <<EOF > $appName-patch.yaml
spec:
  tls:
  - hosts:
    - $domainName
    secretName: $certName
  rules:
  - host: $domainName
    http:
      paths:
      - path: /
        pathType: Prefix
        backend:
          service:
            name: $serviceName
            port:
              number: $servicePort         
EOF
kubectl patch ingress/$appName-wordpress -p "$(cat $appName-patch.yaml)"

c. Import files and database onto new hosting server

  - Database:
    - Access DB server and import sql dump
      podName=kimconnectblog-mariadb-0
      kubectl exec --stdin --tty $podName -- /bin/bash
      rootPassword=SOMEPASSWORD
      echo "show databases;" | mysql -u root -p$rootPassword
      MariaDB [(none)]> show databases;exit;
        +--------------------+
        | Database           |
        +--------------------+
        | bitnami_wordpress  |
        | information_schema |
        | mysql              |
        | performance_schema |
        | test               |
        +--------------------+
        5 rows in set (0.009 sec)
      oldDb=kimconne_blog
      sqlDump=/bitnami/mariadb/data/kimconnect.sql
      mysql -uroot -p$rootPassword test < $sqlDump
      grantUser=bn_wordpress # this is the default Bitnami WordPress user
      echo "GRANT ALL PRIVILEGES ON $oldDb.* TO $grantUser;" | mysql -uroot -p$rootPassword
      #echo "create database $databaseName;" | mysql -uroot -p$rootPassword
      #mysql -uroot -p$rootPassword $oldDb -sNe 'show tables' | while read table; do mysql -uroot -p$rootPassword -sNe "RENAME TABLE $oldDb.$table TO $newDb.$table"; done
      #echo "create user kimconne_blog@localhost;grant all privileges on kimconne_blog.* to 'kimconne_blog';"| mysql -uroot -p$rootPassword
      #ALTER USER 'kimconne_blog'@'localhost' IDENTIFIED BY 'SOMEPASSWORDHERE';
  - Files:
    - Assuming nfs:
      nfsShare=k8s
      nfsServer=10.10.10.5
      sharePath=/volume1/$nfsShare
      mountPoint=/mnt/$nfsShare
      sudo mkdir $mountPoint
      sudo mount -t nfs $nfsServer:$sharePath $mountPoint # Test mounting
      sudo mount | grep $nfsShare # validate mount
      # Assuming Kubernetes NFS
      # sudo mv /home/$(whoami)/Downloads/localhost.sql $mountPoint/path_to_default-data-sitename-mariadb/data/localhost.sql
      # sudo mv /home/$(whoami)/Downloads/public_html.tar.bz2 $mountPoint/public_html.tar.bz2
      bz2File=/mnt/k8s/kimconnectblog/public_html.tar.bz2
      containerPath=/mnt/k8s/default-kimconnectblog-wordpress-pvc-9f1dd4bd-81f3-489f-9b76-bf70f4fd291c/wordpress/wp-content
      tar -xf $bz2File -C $containerPath
      cd $containerPath
      mv public_html/wp-content wp-content
      vim wp-config.php # edit wp config to match the imported database and its prefix

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