mattermost
Chart · Messaging · standard · v0.0.11
Open-source, self-hosted team messaging and collaboration platform (a Slack alternative) with channels, direct messages, file sharing, and integrations. Packaged from Mattermost's official Team Edition server release; requires an external PostgreSQL.
Version
The latest line lives at the base page; older lines have their own page so you can pin and verify exactly that version.
Deployed image digest
sha256:fbd623821cab4daadfbedfdebad2235e20d6f646824c2c3bcafaf9a54aa2d3a6Chart OCI version
oci://ghcr.io/quenchworks/charts/mattermost:0.0.11The chart pins its image by this signed digest, so you never track it yourself. Signatures, SBOM, and provenance attach to the same digest.
Security report (Trivy)
Security report (Trivy) · image mattermost 11.9.0
Install the chart
Deploy to Kubernetes with hardened defaults. The chart pins its image by signed digest, so you never track it yourself.
Install (latest)
helm install my-mattermost oci://ghcr.io/quenchworks/charts/mattermost --version 0.0.11Deploys image (digest-pinned)
ghcr.io/quenchworks/images/mattermost@sha256:fbd623821cab4daadfbedfdebad2235e20d6f646824c2c3bcafaf9a54aa2d3a6
ghcr.io/quenchworks/images/postgresql@sha256:b492e8f2aa8528a0af8bc1aa835522ab222aa8e0a0a6c135b2d5fdc3e9467bd4- Chart version
- 0.0.11
- App version
- 11.9.0
- Chart license
- AGPL-3.0-only
- App license
- AGPL-3.0
- Service port
- 8065
- Signed
- cosign (keyless)
- Values schema
- yes
- Last published
- 2026-07-22
Verify the chart
cosign verify ghcr.io/quenchworks/charts/mattermost:0.0.11 \
--certificate-identity-regexp 'https://github.com/quenchworks/.+' \
--certificate-oidc-issuer https://token.actions.githubusercontent.comTransparency
The chart publishes its attestations on GitHub and the image it deploys carries its own on the same digest, publicly verifiable with the commands above. Both log to the Sigstore transparency log (Rekor), which cosign verify checks for you.
Upstream project: https://mattermost.com