Question:
Some of tasks I wrote start and never end. Ansible does not provide any errors or logs that would explain this, even with -vvvv option. Playbook just hangs and passing hours doesn’t change anything.
When I try to run my tasks manually (by entering commands via SSH) everything is fine.
Example task that hangs:
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- name: apt upgrade shell: apt-get upgrade |
Is there any way to see stdout and stderr ? I tried:
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- name: apt upgrade shell: apt-get upgrade register: hello - debug: msg="{{ hello.stdout }}" - debug: msg="{{ hello.stderr }}" |
but nothing changed.
I do have required permissions and I pass correct sudo password – other tasks that require sudo execute correctly.
Answer:
Most Probable cause of your problem would be SSH connection. When a task requires a long execution time SSH timeouts. I faced such problem once, in order to overcome the SSH timeout thing, create a ansible.cfg in the current directory from which your are running Ansible add the following:
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[ssh_connection] ssh_args = -o ServerAliveInterval=n |
Where n is the ServerAliveInterval (seconds) which we use while connecting to the server through SSH. Set it between 1-255. This will cause ssh client to send null packets to server every n seconds to avoid connection timeout.