# History
## 0.38.20
Install/update via the bootstrap script:
```shell
wget -NP . https://dokku.com/install/v0.38.20/bootstrap.sh
sudo DOKKU_TAG=v0.38.20 bash bootstrap.sh
```
### Tests
- #8773: @dependabot[bot] chore(deps): bump python from 3.15.0b2-bookworm to 3.15.0b3-bookworm in /tests/apps/dockerfile-release
- #8756: @dependabot[bot] chore(deps): bump sass from 1.100.0 to 1.101.0 in /tests/apps/multi
- #8753: @dependabot[bot] chore(deps-dev): bump heroku/heroku-buildpack-php from 291 to 292 in /tests/apps/php
### Dependencies
- #8766: @dependabot[bot] chore(deps): bump helm.sh/helm/v3 from 3.21.1 to 3.21.2 in /plugins/scheduler-k3s
- #8777: @dependabot[bot] chore(deps): bump github.com/onsi/gomega from 1.41.0 to 1.42.1 in /plugins/common
- #8778: @dependabot[bot] chore(deps): bump byjg/easy-haproxy from 6.1.0 to 6.1.1 in /plugins/haproxy-vhosts
- #8748: @dependabot[bot] chore(deps): bump golang.org/x/crypto from 0.52.0 to 0.53.0 in /plugins/common
- #8745: @dependabot[bot] chore(deps): bump golang.org/x/sync from 0.20.0 to 0.21.0 in /plugins/common
- #8774: @dependabot[bot] chore(deps): bump python from 3.15.0b2-alpine to 3.15.0b3-alpine in /docs/_build
- #8769: @dependabot[bot] chore(deps): bump pymdown-extensions from 10.21.3 to 11.0 in /docs/_build
- #8775: @dependabot[bot] chore(deps): bump click from 8.4.1 to 8.4.2 in /docs/_build
- #8776: @dependabot[bot] chore(deps): bump byjg/easy-haproxy from 6.0.1 to 6.1.0 in /plugins/haproxy-vhosts
- #8772: @dependabot[bot] chore(deps): bump github.com/onsi/gomega from 1.42.0 to 1.42.1 in /plugins/buildpacks
- #8770: @dokku-bot chore: bump pack to 0.40.7
- #8767: @dependabot[bot] chore(deps): bump github.com/containerd/containerd from 1.7.32 to 1.7.33 in /plugins/scheduler-k3s
- #8765: @dependabot[bot] chore(deps): bump github.com/onsi/gomega from 1.41.0 to 1.42.0 in /plugins/scheduler-k3s
- #8764: @dependabot[bot] chore(deps): bump actions/checkout from 6 to 7
- #8762: @dependabot[bot] chore(deps): bump k8s.io/kubernetes from 1.36.1 to 1.36.2 in /plugins/scheduler-k3s
- #8758: @dependabot[bot] chore(deps): bump github.com/onsi/gomega from 1.41.0 to 1.42.0 in /plugins/buildpacks
- #8760: @dependabot[bot] chore(deps): bump k8s.io/apimachinery from 0.36.1 to 0.36.2 in /plugins/scheduler-k3s
- #8757: @dependabot[bot] chore(deps): bump helm.sh/helm/v3 from 3.21.0 to 3.21.1 in /plugins/scheduler-k3s
- #8755: @dependabot[bot] chore(deps): bump traefik from v3.7.4 to v3.7.5 in /plugins/traefik-vhosts
- #8754: @dependabot[bot] chore(deps): bump github.com/traefik/traefik/v2 from 2.11.49 to 2.11.50 in /plugins/scheduler-k3s
- #8749: @dependabot[bot] chore(deps): bump github.com/traefik/traefik/v2 from 2.11.47 to 2.11.49 in /plugins/scheduler-k3s
- #8743: @dependabot[bot] chore(deps): bump beautifulsoup4 from 4.14.3 to 4.15.0 in /docs/_build
- #8744: @dependabot[bot] chore(deps): bump traefik from v3.7.3 to v3.7.4 in /plugins/traefik-vhosts
- #8747: @dependabot[bot] chore(deps): bump golang.org/x/sync from 0.20.0 to 0.21.0 in /plugins/scheduler-k3s
- #8746: @dependabot[bot] chore(deps): bump golang.org/x/sync from 0.20.0 to 0.21.0 in /plugins/scheduler-docker-local
The `helm.sh/helm/v3` v3.21.2 bump pulled `client-go` up to `v0.36.2`, which is incompatible with the pinned `controller-runtime v0.22.4`. Moving `controller-runtime` to `v0.24.1` (the first release targeting `client-go v0.36`) requires KEDA `v2.20.1`, allowing the old version pin to be removed.
# History
## 0.38.18
Install/update via the bootstrap script:
```shell
wget -NP . https://dokku.com/install/v0.38.18/bootstrap.sh
sudo DOKKU_TAG=v0.38.18 bash bootstrap.sh
```
### Tests
- #8734: @dependabot[bot] chore(deps): bump golang from 1.26.3 to 1.26.4 in /tests/apps/gogrpc
- #8731: @dependabot[bot] chore(deps): bump golang from 1.26.3 to 1.26.4 in /tests/apps/go-fail-predeploy
- #8733: @dependabot[bot] chore(deps): bump golang from 1.26.3 to 1.26.4 in /tests/apps/zombies-dockerfile-tini
- #8735: @dependabot[bot] chore(deps): bump golang from 1.26.3 to 1.26.4 in /tests/apps/go-fail-postdeploy
- #8736: @dependabot[bot] chore(deps): bump golang from 1.26.3 to 1.26.4 in /tests/apps/zombies-dockerfile-no-tini
- #8738: @dependabot[bot] chore(deps): bump python from 3.15.0b1-bookworm to 3.15.0b2-bookworm in /tests/apps/dockerfile-release
- #8730: @dependabot[bot] chore(deps): bump django from 5.2.14 to 5.2.15 in /tests/apps/dockerfile-release
### Dependencies
- #8727: @dependabot[bot] chore(deps): bump github.com/melbahja/goph from 1.5.0 to 1.5.1 in /plugins/common
- #8739: @dependabot[bot] chore(deps): bump github.com/traefik/traefik/v2 from 2.11.46 to 2.11.47 in /plugins/scheduler-k3s
- #8737: @dependabot[bot] chore(deps): bump dokku/openresty-docker-proxy from 0.12.0 to 0.12.1 in /plugins/openresty-vhosts
- #8732: @dependabot[bot] chore(deps): bump python from 3.15.0b1-alpine to 3.15.0b2-alpine in /docs/_build
- #8740: @dependabot[bot] chore(deps): bump timberio/vector from 0.55.0-debian to 0.56.0-debian in /plugins/logs
- #8741: @dependabot[bot] chore(deps): bump traefik from v3.7.1 to v3.7.3 in /plugins/traefik-vhosts
`common.GetDeployingAppImageName` runs `VerifyImage` and errors out when
no image has been built for the app. A freshly-created app has no image
yet, so the preview could never render for never-deployed apps. Add an
`AllowMissingImage` flag to `BuildOptions` that lets BuildAppChart
substitute a placeholder image string in that case; CommandPreview sets
it. The deploy path still passes `BuildOptions{}`, so missing-image
remains a hard error there.
Without this, the preview build invented a fresh timestamp for
`Values.global.deployment_id` and the resulting diff showed every
Deployment changing its `app.kubernetes.io/version` annotation - even when
nothing semantically changed. CommandPreview now reads the deployment id
out of `release.Chart.Metadata.Version` and passes it through a new
`BuildOptions.OverrideDeploymentID` parameter so the previewed manifests
carry the same version label as the live release. The deploy path still
generates a fresh timestamp.
The previous commit added the dispatcher case but missed appending
`subcommands/preview` to the plugin's `SUBCOMMANDS` list, so no symlink
was created at install time and dokku reported the command as unknown.
Users can override the default 3-line surrounding context per change. Pass
`--context -1` to render the full resource around every change, matching
upstream `helm diff upgrade` behavior.
Adds a `scheduler-k3s:preview <app>` command that renders a unified diff
between the manifests currently stored in the live Helm release for an app
and the manifests that the next deploy would roll out. The diff is produced
entirely via the Helm Go SDK that scheduler-k3s already uses, with no
external `helm` binary or `helm-diff` plugin install required. The
underlying diff and parse logic is vendored from `databus23/helm-diff`
(Apache 2.0) into a new internal package, trimmed of three-way-merge,
release-ownership tracking, and the non-default output formatters.
The chart-construction half of `TriggerSchedulerDeploy` has been extracted
into a reusable `BuildAppChart` helper so deploy and preview share the
same chart materialization without duplicating template logic. Secret
values are redacted by default in preview output; `--show-secrets` and
`--show-secrets-decoded` flags match the upstream `helm diff` UX. Only the
main app helm release is compared in this iteration; auxiliary releases
for config vars, image-pull secrets, and TLS certificates are out of scope
and documented as such.
`common.TouchFile` opened files with `O_TRUNC`, so the call from `common.SshTask.Execute` against `~/.ssh/known_hosts` emptied the dokku user's previously trusted host keys before `goph.DefaultKnownHosts()` read them. Running `scheduler-k3s:cluster:add` without `--insecure-allow-unknown-hosts` then failed with `knownhosts: key is unknown` and left a zero-byte `known_hosts`. The function now matches `touch(1)` semantics: create the file if missing, otherwise leave its contents intact.
