Word press is not using default environment variables in docker container

[deekshith-elear]

Hi,
I'm using WORDPRESS_DB_HOST to provide my database host name as a environmental variable to my wordpress docker container. In My oldversion of docker image which is an year old it is able to work properly. now I want to migrate to 5.8 and getting database connection error. If I hardcode data of host it is working. else it is not fetching data.

Can anyone help me to fix this issue?

[wglambert]

What do the docker logs show for the error? And what's your docker-compose.yml look like

[deekshith-elear]

we are not using docker-compose we are using kubernetes pod file
here is the sample pod file

{
  "kind": "ReplicationController",
  "apiVersion": "v1",
  "metadata": {
    "name": "coco-website",
    "namespace": "coco-services",
    "labels": {
      "name": "coco-website"
    }
  },
  "spec": {
    "replicas": 1,
    "selector": {
      "name": "coco-website"
    },
    "template": {
      "metadata": {
        "name": "coco-website",
        "namespace": "coco-services",
        "labels": {
          "name": "coco-website"
        }
      },
      "spec": {
        "containers": [{
          "name": "wordpress",
          "image": "docker.elear.solutions/coco-website:0.0.1",
          "ports": [{
            "containerPort": 80
          }],
          "imagePullPolicy": "IfNotPresent",
          "env": [{
            "name": "WORDPRESS_DB_HOST", 
            "value": "mysql.cocostore.coco-services.svc.cluster.local:3306"
          },
          {
            "name": "WORDPRESS_DB_USER", 
            "value": "coco"
          },
          {
            "name": "WORDPRESS_DB_PASSWORD", 
            "value": "XXXXX"
          },
          {
            "name": "WORDPRESS_DB_NAME",
            "value": "coco"
          }],
          "volumeMounts": [{
            "mountPath": "/var/www/html/wp-content/uploads",
            "name": "website-uploads"
          }]
        }],
        "volumes": [{
          "name": "website-uploads",
          "hostPath": {
            "path": "/home/ubuntu/kube-volume/coco-website-uploads",
            "type": "DirectoryOrCreate"
          }
        }],
        "nodeSelector": {
          "kubernetes.io/hostname": "kslave-microservices"
        },
        "imagePullSecrets": [{
          "name": "dockercred"
        }],
        "restartPolicy": "Always"
      }
    }
  }
}

docker.elear.solutions/coco-website:0.0.1 is using wordpress:5.8 docker image as a base version