Running TPA in a Docker container

If you are using a system for which there are no TPA packages available, and it’s difficult to run TPA after

Installing from source (for example, because it’s not easy to obtain a working

Python 3.6+ interpreter), your last resort may be to build a Docker image and run TPA inside a Docker container.

Please note that you do not need to run TPA in a Docker container in order to deploy to Docker containers . It’s always preferable to run TPA directly if you can (even on MacOS X).

Quickstart

You must have Docker installed and working on your system already.

Run the following commands to clone the tpaexec source repository from Github and build a new Docker image named tpa/tpaexec :

$ git clone ssh://git@github.com/EnterpriseDB/tpaexec.git
$ cd tpaexec
$ docker build -t tpa/tpaexec .

Double-check the created image:

$ docker image ls tpa/tpaexec
REPOSITORY    TAG       IMAGE ID       CREATED         SIZE
tpa/tpaexec   latest    e145cf8276fb   8 seconds ago   1.73GB
$ docker run --platform=linux/amd64 --rm tpa/tpaexec tpaexec info
#  TPAexec v20.11-59-g85a62fe3 (branch: master)

tpaexec=/usr/local/bin/tpaexec
TPA_DIR=/opt/EDB/TPA
PYTHON=/opt/EDB/TPA/tpa-venv/bin/python3 (v3.7.3, venv)
TPA_VENV=/opt/EDB/TPA/tpa-venv
ANSIBLE=/opt/EDB/TPA/tpa-venv/bin/ansible (v2.8.15)

Create a TPA container and make your cluster configuration directories available inside the container:

$ docker run --platform=linux/amd64 --rm -v ~/clusters:/clusters \
    -it tpa/tpaexec:latest

You can now run commands like tpaexec provision /clusters/speedy at the container prompt. (When you exit the shell, the container will be removed.)

If you want to provision Docker containers using TPA, you must also allow the container to access the Docker control socket on the host:

$ docker run --platform=linux/amd64 --rm -v ~/clusters:/clusters \
    -v /var/run/docker.sock:/var/run/docker.sock \
    -it tpa/tpaexec:latest

Run docker ps within the container to make sure that your connection to the host Docker daemon is working.

Installing Docker

Please consult the Docker documentation if you need help to install Docker and

get started with it.

On MacOS X, you can install “Docker Desktop for Mac”

and launch Docker from the application menu.