Gitlab tokens prometheus exporter

Exports the number of days before GitLab tokens expire as Prometheus metrics.

Configuration

The following environment variables are mandatory (locally you can use a .env file):

GITLAB_HOSTNAME=<gitlab hostname>
GITLAB_TOKEN=<gitlab authentication token>

Optional environment variables with defaults values:

DATA_REFRESH_HOURS=6 (should be > 0 and <= 24 or else, it will be set to the default value: 6)
RUST_LOG=info (to configure the tracing crate)
MAX_CONCURRENT_REQUESTS=10

Optional environment variables not set by default:

ACCEPT_INVALID_CERTS=yes (DANGEROUS!!! disables HTTPS certificate validation when connecting to gitlab)
OWNED_ENTITIES_ONLY=yes (checks only owned projects and groups - useful for gitlab.com)

Getting Started

Run the following commands :

if you have cargo already installed:

cargo build --release

if you want to build a OCI image with docker:

docker build . -t gitlab-tokens-exporter

Known limitations

To get the users tokens, the token used to connect to gitlab must have is_admin

When launching the exporter, it will first get infos on all the gitlab tokens (unless OWNED_ENTITIES_ONLY is set to yes), so it can take some time depending on the number of projects/groups/users to scan.

The exporter returns 204 No Content until the first scan is done.