cert-manager-acmesolver
ACME Solver Overview
Secure your stack with a hardened ACME Solver 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.
Use the ACME Solver to automate the renewal and issuance of TLS certificates. The ACME Solver container image is part of the cert-manager toolkit for provisioning and managing TLS certificates in Kubernetes.
Try It Out
cert-manager-acmesolver can be deployed via Helm charts. See the related charts tab to get started.
Run a quick test
The ACME (Automatic Certificate Management Environment) protocol is used to prove domain ownership by responding to an ACME server challenge (such as Let's Encrypt). To take the container for a test run, we will run a challenge locally.
Start the ACMS Solver container with port 8089 exposed:
docker run --rm -p 8089:8089 \
reg.mini.dev/cert-manager-acmesolver \
--listen-port=8089 \
--domain=localhost \
--key=test-key \
--token=test-tokenRun an ACME challenge:
curl http://localhost:8089/.well-known/acme-challenge/test-tokenYou should get the response test-key. The container should also print a success log, for example:
I0706 09:49:05.599590 1 solver.go:112] "got successful challenge request, writing key" logger="cert-manager.acmesolver" host="localhost" path="/.well-known/acme-challenge/test-token" base_path="/.well-known/acme-challenge" token="test-token" headers={"Accept":["*/*"],"User-Agent":["curl/7.68.0"]}` Technical Considerations
The ACME Solver 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.
ACME Solver built by Minimus:
- Starting with version 1.20, the default user changed from 1000 to 65532 to align with the public image.
- The entrypoint is under
/usr/bin/acmesolver. The entrypoint of the public image is under/app/cmd/acmesolver/acmesolver. - 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
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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.