Systemd nuances with .target/.service dependencies.

Today I gave no rants. Systemd is doing a great job to think about all nuances of a service start. When an administrator uses it, and all units are written properly, it’s a bliss to use.

Converting feature flags into groups in Ansible

There is a specific case when you want to execute a play for hosts with a specific attribute. For sake of illustration I’ll use hardware_raid: true in all examples, but it should be equally useful for all other cases.

Working with go-templates in Ansible

!unsafe

There was an endless pain on templatization of yaml files containing go-inspired string interpolation. The most known culprits are Prometheus and Kapacitor. The Prometheus is the most outstanding because it has yaml as format…

Screw netplan, screw ifupdown

Let’s to systemd it!

I got tired of fighting different ‘network configuration suites’ for ip alias purposes. I gave up on them completely and start to use simple but robust systemd dependency system.

Worst practices for Ansible

Few month ago I made a presentation about ‘worst practices for Ansible’ in Russian, where I’ve discussed about anti-patterns in Ansible…

On importance of testing trivial things

Long ago I have had this rather silly test for my application:

def test_Main_empty_cmdline(commands):
    with pytest.raises(SystemExit):
        commands.Main([])