Posts Tagged ‘Ansible’

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


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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 […]

Use restview to to make the Ansible rst documentation browsable

The ansible-doc package not only installs the command line tool but also some quite detailed Ansible documentation in rst format. It would be nice if it was browsable in a html format. Here’s how that can happen (Redhat/CentOS) First install pip and restview… ?View Code BASHsudo yum install python-pip sudo pip install restview This will […]

Offset cron jobs with Ansible

Sometimes I want to run the same cronjob on a few hosts but I might want to offset them slightly if I’m accessing any shared resources. Here’s an easy way to do that, for a small number of hosts, using Ansible… ?View Code YAML- name: Ensure cron exists cron: name: Test Job minute: "{{ play_hosts.index(inventory_hostname) […]