从本地可用的Docker映像中使用ansible-playbook启动Docker容器

Question

I have created a docker image with name revi-centos6. (The image has not been pushed to the docker hub)

Used the command as follows:

sudo docker build -t revi-centos6 .

The image got built successfully. Also ran docker images and found the newly created docker image in the list.

I have the following playbook contents (docker1.playbook):

# Create a a docker container on localhost (this has an ssh server in the image)
- hosts: localhost
  sudo: yes
  tasks:
  - name: start container
    docker: image=revi-centos6 hostname=test name=test detach=False state=running

I then ran the following command:

ansible-playbook --ask-sudo-pass docker1.playbook -vvvv

However, I got the following error:

failed: [localhost] => {"changes": ["{\\"status\\":\\"Pulling repository revi-centos6\\"}\\r\\n", "{\\"errorDetail\\":{\\"message\\":\\"Error: image library/revi-centos6:latest not found\\"},\\"error\\":\\"Error: image library/revi-centos6:latest not found\\"}\\r\\n"], "failed": true, "status": ""} msg: Unrecognized status from pull.

Why isn't it picking the image that was built locally and trying to look up for it from the hub? Does that mean every time I create a new docker image, I have to push it to the hub?

Note: Btw I did run sudo docker run -t revi-centos6 , and it is able to launch the container from the locally created docker image. Problems seems to occurring only while using ansible-playbook command with the docker module.

Answer 1

The issue here is with the docker-py module which has had some update recently that will probe the hub for the image first. docker-py does not use the command-line tools, it uses its own implementation of the docker api and does things in its own way. Try running your own private registry.