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Note: You need to carefully check the service status. Perform chkconfig docker on to make the service start across reboots. Once device-mapper is installed, start the Docker service as suggested in Step 3. The solution is to upgrade the device-mapper RPM using yum –y install device-mapper-event-libs. usr/bin/docker: relocation error: /usr/bin/docker: symbol dm_task_get_info_with_deferred_remove, version Base not defined in file libdevmapper.so.1.02 with link time reference.” The reason for the failure is that Docker has a dependency on device-mapper and the Docker version used in this specific version of CentOS7 expects the device–mapper version to be >= 1.02.90. Note: In this specific version of CentOS7, the Docker engine kept showing an error code “ Failed to start Docker Application Container Engine. Start the Docker service using systemctl start rvice. Install Docker using yum –y install docker.ģ. Add the following lines to /etc/yum.conf: proxy= proxy_username=Ģ. The very first step is setting up Yum with the proxy details. So let’s get on with installing and setting up Docker on a CentOS7 machine (CentOS Linux release (Core) and kernel version is 3.10.0-123.20.1.el7.x86_64) when it runs behind a proxy.

When you run Docker behind a proxy, you need to provide the proxy details to download the images. Setting up Docker in CentOS7, which runs behind a proxy