Plesk Administrator receives emails with the following message: dgri-report: docker socket present but not accessible

Symptoms

• Numerous email notifications sent to Plesk administrator mailbox:

  [email protected]> /usr/bin/dgri-report collect on_unchanged_config=nop with detail message – docker socket present but not accessible

• No Docker containers are running on the server

• Docker is not installed in Extensions, but its packages can be seen on the server:

  For Red Hat/CentOS OS:

  # yum list installed | grep -i docker
  containerd.io.x86_64 1.2.6-3.3.el7 @plesk-ext-docker
  docker-ce.x86_64 3:19.03.1-3.el7 @plesk-ext-docker
  docker-ce-cli.x86_64 1:18.09.0-3.el7 @plesk-ext-docker

  For Debian/Ubuntu OS:

  # dpkg -l | grep docker
  ii docker-engine 17.05.0~ce-0~debian-jessie amd64 Docker: the open-source application container engine

Cause

Docker was not properly removed.

Resolution

1. Connect to the server via SSH

2. Stop Docker process:

   # service docker stop

3. Remove Docker package from the server:

   For Red Hat/CentOS OS:

   # rpm -e –nodeps docker-ce.x86_64

   For Debian/Ubuntu OS:

   # dpkg -P –force-all docker-engine