set TTL to 600 to prepare mail server migration

See merge request !110

Sorry, this was kind of an emergency and I had to quickly perform this change so no MR for this.

Remove host label for our metrics

See merge request !105

Jelle van der Waa authored 4 years ago and Sven-Hendrik Haase committed 4 years ago

All our node_exporter's have an instance label already which shows the
hostname of the machine. The instance label is also used in our
prometheus alerts making host obsolete.

certbot: Disable built-in random-sleep

See merge request !106

certbot by default sleep 1-480 seconds before renewing, to avoid all
people renewing at :00. In our case the logic is is unnecessary as
systemd is handling it (RandomizedDelaySec=24h).

Cleanup common

See merge request !104

Ansible's hostname supports setting the hostname with hostnamectl, which
makes our systems after the removal of inetutils legacy free.

gitlab-runners: Add IPv6 config to Docker

See merge request !103

Document our Grafana setup

See merge request !102

Document addinga new dashboard and how our Grafana is configured.

We actually don't want to set any other permissions here and trust the bootstrap image to be correct.

remove distinction between btrfs and non-btrfs FS in clean-chroots

See merge request !101

rmdir of subvolumes is supported since 4.18

Add configuration to retain prometheus data for 365 days

See merge request !91

Start monitoring prometheus to keep check of the database growth rate
and retain data for a longer preriod in prometheus.

Add rebuilderd_results Prometheus metric

Closes #146

See merge request !97

To monitor if reproducible builds are going in the right direction,
record the good/bad/unknown metrics from rebuilderd with a Prometheus
textcollector for a Grafana dashboard to display a long term trend.

A Python script is required to handle data collection as obtaining the
status with jq/bash is non trivial and cannot easily dnyamically collect
suites and statuses.

Closes: #146

Ansible doesn't understand provides.

Add raster as new TU

Closes #154

See merge request !98

Raster has been accepted as a new TU
https://lists.archlinux.org/pipermail/aur-general/2020-September/035936.html

Closes: #154

Use Ansible 2.4's newly introduced resource_limits for mysql_user

See merge request !100