Posts Tagged ‘Ansible’

Using Ansible Modules with Testinfra

I’ve been looking at improving the quality of the testing I do with Molecule and Testinfra. Simple checks like service.is_running or package.is_installed have their place but they’re pretty limited as to what assurances they provide us. Part of the issue I have is that some tests need a fair bit of setup to make them […]

Wait for processes to end with Ansible

I’ve been doing a lot in stuff in ansible recently where I needed to fire up, kill and relaunch a bunch of processes. I wanted to find a quick and reliable way of managing this… This is possible using a combination of the pids and wait_for modules… First get the pids of your process… – […]

ansible-vault unexpected exception on Ubuntu

When attempting to edit an ansible-vault file… ansible-vault edit roles/cassandra_backup/vars/test_s3_cfg.yaml The following error was received… ERROR! Unexpected Exception, this is probably a bug: from_buffer() cannot return the address of the raw string within a str or unicode or bytearray object Encountered on this version of Ubuntu… Linux xxxxxxxxx 4.15.0-43-generic #46~16.04.1-Ubuntu SMP Fri Dec 7 13:31:08 […]

“could not open session” error in docker container

I received the following error, attempting to cat a log file, inside a docker contain when troubleshooting another issue… TASK [setup_cassandra : shell] ************************************************* changed: [testhost] => {“changed”: true, “cmd”: “cat /var/log/cassandra/*”, “delta”: “0:00:00.004140”, “end”: “2019-03-16 18:48:28.684133”, “rc”: 0, “start”: “2019-03-16 18:48:28.679993”, “stderr”: “”, “stderr_lines”: [], “stdout”: “could not open session”, “stdout_lines”: [“could not open […]

Ansible: stop / start services on random hosts

In the coming weeks I’m performing some testing of a new application on a Cassandra cluster. To add a little randomness into some of the tests I thought it would be interesting to give the Cassandra service a little kick. I created a simple Ansible playbook this afternoon that does this. A simple Chaos Monkey […]