Automation: Ansible

The following list contains all posts I wrote about Ansible in chronological order

Ansible tips’n’tricks: run select parts of a playbook using tags

I have recently re-discovered an Ansible feature I haven’t used in a while: tagging. Ansible allows you to define tags at various places of your playbook. On its own that wouldn’t be terribly useful, except that you can pass tags to ansible-playbook causing the interpreter to selectively run tasks tagged appropriately. My example uses Ansible […]

Ansible tips’n’tricks: using the OCI Dynamic Inventory Plugin in playbooks

After having covered how to configure the Ansible Dynamic Inventory Plugin for Oracle Cloud Infrastructure (OCI) in the previous posts now it’s time to get it to work with my simple-app cloud application. Before I go into more detail, I’d like to add the usual caveat first. Caveat As I said in the previous post, […]

Ansible Dynamic Inventory Plugin for OCI: where are all my hosts?

I wrote about the configuration of the Ansible Dynamic Inventory Plugin for Oracle Cloud Infrastructure (OCI) in a previous post. As it seems to happen all the time, the length of the post escalated quickly. When I finished the previous post there was still a lot to say! For example, I wanted to share the […]

Handling kernel upgrades with Ansible prior to an Oracle installation

As part of the process of setting up VMs in the cloud for use with the Oracle database it is frequently necessary to update the systems to the latest and greatest, and hopefully more secure packages before the Oracle installation can begin. In a similar way I regularly upgrade the (cloud-vendor provided) base image when […]

Passing complex data types to Ansible on the command line

Earlier this year I wrote a post about passing JSON files as –extra-vars to ansible-playbook in order to simplify deployments and to make them more flexible. JSON syntax must be used to pass more complex data types to Ansible playbooks, the topic of this post. Unlike last time though I’ll pass the arguments directly to […]

Ansible tips’n’tricks: defining –extra-vars as JSON

While I’m continuing to learn more about Ansible I noticed a nifty little thing I wanted to share: it is possible to specify –extra-vars for an Ansible playbook in a JSON document in addition to the space-separated list of key=value pairs I have used so often. This can come in handy if you have many […]

Ansible Tips’n’tricks: rebooting Vagrant boxes after a kernel upgrade

Occasionally I have to reboot my Vagrant boxes after kernel updates have been installed as part of an Ansible playbook during the “vagrant up” command execution. I create my own Vagrant base boxes because that’s more convenient for me than pulling them from Vagrant’s cloud. However they, too, need TLC and updates. So long story […]

Ansible tips’n’tricks: executing a loop conditionally

When writing playbooks, I occasionally add optional tasks. These tasks are only executed if a corresponding configuration variable is defined. I usually define configuration variables either in group_vars/* or alternatively in the role’s roleName/default/ directory. The “when” keyword can be used to test for the presence of a variable and execute a task if the […]

Ansible tips’n’tricks: checking if a systemd service is running

I have been working on an Ansible playbook to update Oracle’s Tracefile Analyser (TFA). If you have been following this blog over the past few months you might remember that I’m a great fan of the tool! Using Ansible makes my life a lot easier: when deploying a new system I can ensure that I’m […]

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