feat(etherpad): bump to 2.6.1 and switch to official image

[JohnMcLear]

Description

Bumps stable/etherpad from 1.8.14 to 2.6.1 and migrates the image source from the stale community fork ghcr.io/nicholaswilde/etherpad (last published 2023, pinned at version-1.8.14) to the official Etherpad Foundation image.

Chart version: 20.1.0 → 21.0.0 (major — upstream 1.x → 2.x, plus one breaking persistence change).

⚒️ Fixes #

⚙️ Type of change

• ⚙️ Feature/App addition
• 🪛 Bugfix
• ⚠️ Breaking change (fix or feature that would cause existing functionality to not work as expected)
• 🔃 Refactor of current code
• 📜 Documentation Changes

🧪 How Has This Been Tested?

• helm lint charts/stable/etherpad — passes
• helm template charts/stable/etherpad — renders cleanly
• Pre-commit on changed files — passes
• Verified env-var names (DB_TYPE, DB_NAME, DB_USER, DB_PORT, DB_PASS, DB_HOST, TITLE, FAVICON, DEFAULT_PAD_TEXT, ADMIN_PASSWORD, USER_PASSWORD) against upstream settings.json.docker on ether/etherpad — unchanged between 1.8.x and 2.6.x.
• Verified persistence.data mount path /opt/etherpad-lite/var exists in the 2.x image (EP_DIR=/opt/etherpad-lite, Dockerfile stages var/, src/, bin/, settings.json).

📃 Notes:

Re: registry preference raised in review — upstream has just landed ether/etherpad#7569, which publishes identical SemVer-tagged images to ghcr.io/ether/etherpad alongside Docker Hub. 2.6.1 is being mirrored to GHCR now; this PR will be updated in a follow-up commit to point image.repository at ghcr.io/ether/etherpad and update Chart.yaml sources accordingly, so downstream users avoid Docker Hub anonymous pull rate limits. The SemVer tag pattern is unchanged, so Renovate will track minor/patch bumps automatically from either registry.

Breaking changes for operators upgrading 1.x → 2.x:

• persistence.app removed — path /opt/etherpad-lite/app does not exist in 2.x. persistence.data at /opt/etherpad-lite/var is retained and covers state that must survive a pod restart.
• Users with custom runtime-installed plugins (previously written into the app PVC) should re-declare them via the ETHERPAD_PLUGINS env.
• settings.json gained keys between 1.8.x and 2.6.x (OIDC, new rate-limit knobs, trustProxy changes) — re-diff if mounting a custom settings file.
• Back up the Postgres DB before upgrading; Etherpad migrates schema on first boot.

✔️ Checklist:

• ⚖️ My code follows the style guidelines of this project
• 👀 I have performed a self-review of my own code
• #️⃣ I have commented my code, particularly in hard-to-understand areas
• 📄 I have made changes to the documentation — README/CHANGELOG intentionally skipped per .github/copilot-instructions.md (auto-generated by repo tooling)
• 🧪 I have added tests to this description that prove my fix is effective or that my feature works
• ⬆️ I increased versions for any altered app according to semantic versioning
• I made sure the title starts with feat(chart-name):, fix(chart-name):, chore(chart-name):, docs(chart-name): or fix(docs):

➕ App addition

Not applicable — this PR updates an existing chart.

[CLAassistant]

All committers have signed the CLA.

[alfi0812]

@JohnMcLear please stick to our PR template and fill it out accordingly and need to sign ci. Otherwise our changelog will have issues

[alfi0812]

Also when possible we prefer ghcr.io as docker causes many issues with rate limiting

[alfi0812]

Also per your link: ether/etherpad#7529

We make helm-charts. We are not affiliated by trunas or their OS and our charts can be run on any system running kubernetes.

[alfi0812]

As long as your tags follow SemVer renovate should pick it up so need to ki pr spam

[alfi0812]

Read comments

[Crow-Control]

He has 24 hours to apologise, then we will take action for mass AI spamming.

[JohnMcLear]

Apologies for the noise, the feedback is useful :) I'll look into this briefly now to see what went so wrong and document it :)

1. TrueCharts ≠ TrueNAS SCALE. The original survey miscategorised TrueCharts as a TrueNAS-only catalog; it's a general Helm chart repo. Apologies to the TrueCharts maintainers for that framing.
2. Contribution guidelines. At least two of the downstream(from Etherpad) PRs I opened did not start by reading the target project's PR template / CONTRIBUTING. Rectified :)

[JohnMcLear]

CLA signed. Making required changes to paths now :) Edit: Looks like you guys want ghcr.io deployment so I'm looking at sorting that first :) Bare with...

[alfi0812]

Closed as ki spam