docker.md

Docker

Below are the steps in creating the docker.sh shell script:

1. Begin the line with the shebang #!/bin/bash to specify that the bourne again shell is required to run this script.

2. The LF unix-style line ending is essential to avoid vague errors.

3. Use docker pull to make initial downloads of the required images.

4. Copy the provided static site html file from current working directory to user directory.

5. Run docker run to create the containers. We use the -dit flag to run them in detached mode with an interactive prompt on /bin/bash. Make sure to name the containers for further reference. In the Nginx case, map the local 8080 port to the container's 80 port. Copy the site contents from ~/site-packages into a mounted volume.

6. We will need to use ping, which is available by default on the Kibana image. Install on the other containers by running docker exec with the appropriate install directives.

7. Create a bash array to reference the container names for repetitive commands.

8. Create a docker bridge network entNet.

9. Connect each container to this new network.

10. Inspect the network to confirm.

11. Run docker exec into each instance and ping the two other instances with two pulses each.

12. Run docker exec into the Kibana container and curl the Nginx container to verify web functionality.

13. Create the cleanup script to tidy things up.

14. Annotate with comments and echos for clarity.