CH07 Lab - Test Environment

[mehul08]

Exercise
Section 7.6 Lab, Pg no. 257-258

Problem

I start the terminal in the "lab" directory of Ch07 and ran the development compose file with the command docker-compose -f docker-compose-dev.yml up -d and it worked. It stared a new container.

I stopped that container and ran the command mkdir -p /data/postgres (out put was "mkdir: /data/postgres: Read-only file system") and then ran docker-compose -f docker-compose-test.yml up -d but it throws an error. Says that the source path for the bind mount doesn't exist.

No directory called data was created in the lab folder. I manually created the data directory and then postgres directory inside it, it still throws the same error that the source path cannot be found.

I was very confused in this lab. I thought that I had to write a docker-compose file but in the lab directory, there were already docker-compose files for dev and test environments. I tried creating a new docker-compose file by looking at the docker-compose file for the todo-list and added restart functionality and volumes. But it failed.

Thank you.

Docker version
Client: Docker Engine - Community
Cloud integration: 1.0.12
Version: 20.10.5
API version: 1.41
Go version: go1.13.15
Git commit: 55c4c88
Built: Tue Mar 2 20:13:00 2021
OS/Arch: darwin/amd64
Context: default
Experimental: true

Server: Docker Engine - Community
Engine:
Version: 20.10.5
API version: 1.41 (minimum version 1.12)
Go version: go1.13.15
Git commit: 363e9a8
Built: Tue Mar 2 20:15:47 2021
OS/Arch: linux/amd64
Experimental: false
containerd:
Version: 1.4.4
GitCommit: 05f951a3781f4f2c1911b05e61c160e9c30eaa8e
runc:
Version: 1.0.0-rc93
GitCommit: 12644e614e25b05da6fd08a38ffa0cfe1903fdec
docker-init:
Version: 0.19.0
GitCommit: de40ad0

Code version
fatal: not a git repository (or any of the parent directories): .git