Error occurred during build: Command 01_symlink failed

Hello team,

I have deployed wordpress application on Elastic Beanstalk. Now I have added one more directory named .ebextension in project root directory to mount the elastic filesystem on Beanstalk EC2 Amazon Linux instance

In this .ebextension, i have placed two files.

1. i have used default storage-efs-mountfilesystem.config and updated my filesystem id and mounted directory that is /uploads

option_settings:
  aws:elasticbeanstalk:application:environment:
    FILE_SYSTEM_ID: 'fs-0123456789'
    MOUNT_DIRECTORY: '/uploads'

##############################################
#### Do not modify values below this line ####
##############################################

packages:
  yum:
    amazon-efs-utils: []

commands:
  01_mount:
    command: "/tmp/mount-efs.sh"

files:
  "/tmp/mount-efs.sh":
      mode: "000755"
      content : |
        #!/bin/bash

        EFS_MOUNT_DIR=$(/opt/elasticbeanstalk/bin/get-config environment -k MOUNT_DIRECTORY)
        EFS_FILE_SYSTEM_ID=$(/opt/elasticbeanstalk/bin/get-config environment -k FILE_SYSTEM_ID)

        echo "Mounting EFS filesystem ${EFS_FILE_SYSTEM_ID} to directory ${EFS_MOUNT_DIR} ..."

        echo 'Stopping NFS ID Mapper...'
        service rpcidmapd status &> /dev/null
        if [ $? -ne 0 ] ; then
            echo 'rpc.idmapd is already stopped!'
        else
            service rpcidmapd stop
            if [ $? -ne 0 ] ; then
                echo 'ERROR: Failed to stop NFS ID Mapper!'
                exit 1
            fi
        fi

        echo 'Checking if EFS mount directory exists...'
        if [ ! -d ${EFS_MOUNT_DIR} ]; then
            echo "Creating directory ${EFS_MOUNT_DIR} ..."
            mkdir -p ${EFS_MOUNT_DIR}
            if [ $? -ne 0 ]; then
                echo 'ERROR: Directory creation failed!'
                exit 1
            fi
        else
            echo "Directory ${EFS_MOUNT_DIR} already exists!"
        fi

        mountpoint -q ${EFS_MOUNT_DIR}
        if [ $? -ne 0 ]; then
            echo "mount -t efs -o tls ${EFS_FILE_SYSTEM_ID}:/ ${EFS_MOUNT_DIR}"
            mount -t efs -o tls ${EFS_FILE_SYSTEM_ID}:/ ${EFS_MOUNT_DIR}
            if [ $? -ne 0 ] ; then
                echo 'ERROR: Mount command failed!'
                exit 1
            fi
            chmod 777 ${EFS_MOUNT_DIR}
            runuser -l  ec2-user -c "touch ${EFS_MOUNT_DIR}/it_works"
            if [[ $? -ne 0 ]]; then
                echo 'ERROR: Permission Error!'
                exit 1
            else
                runuser -l  ec2-user -c "rm -f ${EFS_MOUNT_DIR}/it_works"
            fi
        else
            echo "Directory ${EFS_MOUNT_DIR} is already a valid mountpoint!"
        fi

        echo 'EFS mount complete.'

2. mount.config - In this mount.config file i have updated code like below.

container_commands:
  01_symlink:
    command: ln -s /uploads /var/app/ondeck/wp-content/

When i deploy my code as zip into Beantsalk environment, its getting failed.

If I had a quick look at the eb-engine logs in Beanstalk,

2024/03/02 06:27:18.719789 [INFO] Error occurred during build: Command 01_symlink failed

2024/03/02 06:27:18.719827 [ERROR] An error occurred during execution of command [app-deploy] - [PostBuildEbExtension]. Stop running the command. Error: Container commands build failed. Please refer to /var/log/cfn-init.log for more details. 

If I check with the cfn-init.log, I could see the below logs

2024-03-02 06:27:18,681 [ERROR] Error encountered during build of postbuild_0_MyWebsiteApplication: Command 01_symlink failed
Traceback (most recent call last):
  File "/usr/lib/python3.9/site-packages/cfnbootstrap/construction.py", line 579, in run_config
    CloudFormationCarpenter(config, self._auth_config, self.strict_mode).build(worklog)
  File "/usr/lib/python3.9/site-packages/cfnbootstrap/construction.py", line 277, in build
    changes['commands'] = CommandTool().apply(
  File "/usr/lib/python3.9/site-packages/cfnbootstrap/command_tool.py", line 127, in apply
    raise ToolError(u"Command %s failed" % name)
cfnbootstrap.construction_errors.ToolError: Command 01_symlink failed
2024-03-02 06:27:18,683 [ERROR] -----------------------BUILD FAILED!------------------------
2024-03-02 06:27:18,683 [ERROR] Unhandled exception during build: Command 01_symlink failed
Traceback (most recent call last):
  File "/opt/aws/bin/cfn-init", line 181, in <module>
    worklog.build(metadata, configSets, strict_mode)
  File "/usr/lib/python3.9/site-packages/cfnbootstrap/construction.py", line 137, in build
    Contractor(metadata, strict_mode).build(configSets, self)
  File "/usr/lib/python3.9/site-packages/cfnbootstrap/construction.py", line 567, in build
    self.run_config(config, worklog)
  File "/usr/lib/python3.9/site-packages/cfnbootstrap/construction.py", line 579, in run_config
    CloudFormationCarpenter(config, self._auth_config, self.strict_mode).build(worklog)
  File "/usr/lib/python3.9/site-packages/cfnbootstrap/construction.py", line 277, in build
    changes['commands'] = CommandTool().apply(
  File "/usr/lib/python3.9/site-packages/cfnbootstrap/command_tool.py", line 127, in apply
    raise ToolError(u"Command %s failed" % name)
cfnbootstrap.construction_errors.ToolError: Command 01_symlink failed

However, EFS has been mounted in /uploads directory successfully.

#mount -t nfs4

127.0.0.1:/ on /uploads type nfs4 (rw,relatime,vers=4.1,rsize=1048576,wsize=1048576,namlen=255,hard,noresvport,proto=tcp,port=20091,timeo=600,retrans=2,sec=sys,clientaddr=127.0.0.1,local_lock=none,addr=127.0.0.1)

If I check with my project directory, whether mount link has been created, But its not created.

Am I missing anything? Can any one please what should i do to resolve this?