karma

Infra

Updated 5 days ago

Karma Overview

Secure your stack with a hardened Karma image freshly-built by Minimus. Minimus images always include the most up-to-date package version for all packages and dependencies contained in the image.

Karma is a dashboard for Prometheus Alertmanager. It fills the gaps in Alertmanager's own UI, aggregating alerts from one or more Alertmanager instances into a single view with grouping, silence management, alert history, and multi-grid layouts.

Try It Out

For a quick test, run Karma against an Alertmanager instance.

Create a shared network so the containers can reach each other by name:

docker network create karma-net

Create a simple Alertmanager configuration file. Save it as alertmanager.yml in your current working directory.

global:
  resolve_timeout: 10m

route:
  receiver: 'example-webhook'        # A default receiver is required
  group_by: ['alertname']
  group_wait: 1s
  group_interval: 1m
  repeat_interval: 1h

receivers:
  - name: 'example-webhook'
    webhook_configs:
      - url: 'http://example.com/hook'

Set the file permissions to make the file readable by the container's non-root user:

chmod 644 alertmanager.yml

Start Alertmanager on the network, advertising itself as alertmanager so Karma can reach it by name:

docker run -d --rm --name alertmanager --network karma-net \
  -v ./alertmanager.yml:/etc/alertmanager/alertmanager.yml \
  reg.mini.dev/prometheus-alertmanager

Run Karma on the same network, pointed at the Alertmanager instance:

docker run --rm --network karma-net \
  -p 8080:8080 \
  -e ALERTMANAGER_URI=http://alertmanager:9093 \
  reg.mini.dev/karma

Visit the dashboard at http://localhost:8080.

Technical Considerations

The Karma image provided by Minimus is a slim, security-hardened alternative to the public image. The images are largely interchangeable, with a few differences as noted below.

Karma built by Minimus:

Runs as non-root by default for a security-first approach that protects against privilege escalation attacks.
Drill down on the version specification tab to see the default user, listening ports, entrypoint, volumes, environment variables, etc.

The Payoff

A hardened, minimal image that will remain more secure for the long run and accrue vulnerabilities at a slower rate.

See the risk reduction dashboard for a detailed CVE comparison over the past 30 days.
Review the compliance report to see the default hardening and security configurations for the image.

Terms & Info

Trademark

This catalog is published by Minimus. All product names, logos, and marks, other than those belonging to Minimus, shown are owned by their respective rights holders and appear here only to identify the open source software each image contains. Minimus claims no ownership of those marks and implies no affiliation with, endorsement by, certification by, or sponsorship by any rights holder.

Disclaimer

Images are provided "as-is" without warranty of any kind. "Hardened" refers to the security configuration applied at the time of build and does not constitute a guarantee of ongoing security or absence of vulnerabilities. The free tier is provided without support, SLA, or guaranteed patching timelines. Security updates may be applied to paid subscriptions before or instead of free tier images. By pulling or using any image you agree to our Terms of Use.