How to run ansible script inside a docker container - docker

Question

I am using docker for testing my playbooks.
I created a container now when i am running below command inside container its giving me below error
ansible-playbook jenkins.yml
Error:-
[root#db1e9105692d jenkins-playbook]# ansible-playbook jenkins.yml -k -vvv
SSH password:
PLAY [localhost] **************************************************************
GATHERING FACTS ***************************************************************
<localhost> ESTABLISH CONNECTION FOR USER: root
<localhost> REMOTE_MODULE setup
<localhost> EXEC sshpass -d4 ssh -C -tt -v -o ControlMaster=auto -o ControlPersist=60s -o ControlPath="/root/.ansible/cp/ansible-ssh-%h-%p-%r" -o StrictHostKeyChecking=no -o GSSAPIAuthentication=no -o PubkeyAuthentication=no -o ConnectTimeout=10 localhost /bin/sh -c 'mkdir -p $HOME/.ansible/tmp/ansible-tmp-1454580537.38-114451000565344 && echo $HOME/.ansible/tmp/ansible-tmp-1454580537.38-114451000565344'
EXEC previous known host file not found for localhost
fatal: [localhost] => SSH Error: ssh: connect to host localhost port 22: Connection refused
while connecting to 127.0.0.1:22
It is sometimes useful to re-run the command using -vvvv, which prints SSH debug output to help diagnose the issue.
TASK: [jenkins | Include OS-Specific variables] *******************************
<localhost> ESTABLISH CONNECTION FOR USER: root
fatal: [localhost] => One or more undefined variables: 'ansible_os_family' is undefined
FATAL: all hosts have already failed -- aborting
PLAY RECAP ********************************************************************
to retry, use: --limit #/root/jenkins.retry
localhost : ok=0 changed=0 unreachable=2 failed=0
But if i run this command on host machine its running fine.Do i need to do anything so that connection do not gets refused on port 22.inside docker container
Please do not consider below line as reason for error.Its just that ansible has executed few more lines before throwing error. Actually its not able to run so thats why value of this variable is empty.
fatal: [localhost] => One or more undefined variables: 'ansible_os_family' is undefined

Answer 1

In your container start your playbook locally:
$ ansible-playbook jenkins.yml -c local -k -vvv

Answer 2

Do you have connection=local defined for localhost? It's trying to connect via ssh, which can not work because you probably do not have sshd running in your container.