= Linux Metrics Exporter for OpenShift Nodes =

== Components ==

. Container Image for SAR
. Container Image for PSACCT
. Container Image for Exporter

== Deployment ==

TBD

== Images ==

=== SAR ===

Sar image is based on ubi-micro and includes just the `sysstat` package.

It expects a volume to be attached at `/var/log/sa`.

Entrypoint takes care of initialising the volume and rotating any old `sar` files out of the way.

It *requires* to be executed under `root` UID.

It also *requires* access to host's network namespace if you want to measure network statistics.

=== PSACCT ===

Sar image is based on ubi-micro and includes just the `psacct` package.

It expects a volume to be attached at `/var/account`.

Entrypoint takes care of initialising the volume and rotating any old `pacct` files out of the way.

In addition to *requiring* execution under `root` UID, it also *requires* the `SYS_PACCT` capability.

It also *requires* access to host's PID namespace (`--pid=host` podman option).

=== Exporter ===

TBD