The Geek Diary

Question: How to Pause and Resume running containers on docker host? This post will help to know about pausing and resuming any running containers on the Docker host. Let's first start the docker container "memory_test" on the docker host. # docker start memory_test memory_test To stop the pause the docker container: # docker pause memory_test memory_test Verify the state of docker container using "docker ps": # docker ps CONTAINER ID IMAGE COMMAND … [Read more...] about How to Pause and Resume Docker Containers

Question: How to monitor a running docker container performance metrics. For example, CPU,memory, I/O and network stats? The docker stats command can continuously report the basic CPU, memory, network and disk I/O metrics. For example: # docker stats a3f78cb32a8e CONTAINER ID NAME CPU % MEM USAGE / LIMIT MEM % NET I/O BLOCK I/O PIDS a3f78cb32a8e hello-world 0.00% 2.137MiB / 3.605GiB 0.06% 0B / 0B 9.95MB / 0B 0 Alternatively, you can … [Read more...] about Understanding “docker stats” Command Output

This post illustrates three methods to link Docker containers. Expose ports and port binding Expose ports This method is used for within the same network or the docker host. Containers on the same network can talk to each other over their exposed ports and you can expose the ports by one of the below methods. - Put EXPOSE 80 (or any port you want) in your Dockerfile that’s going to tell Docker that your container’s service can be connected to on port 80. - Expose a port using '--expose … [Read more...] about Docker Basics – Expose ports, port binding and docker link