Keel Dev Stack

What this skill does

Operates the local Keel development stack from this repository:

1. k3s cluster — a k3s-in-Docker cluster created with k3d (named k3d-dev-cluster, API server on https://0.0.0.0:6443).
2. Keel backend — the Go binary keel --no-incluster --ui-dir ui/dist started with basic auth enabled (BASIC_AUTH_USER/BASIC_AUTH_PASSWORD). It connects to the cluster via the local kubeconfig and serves the API/webhooks/dashboard on port 9300. Without auth enabled, Keel does NOT register the dashboard routes at all (every URL, including /, returns Go's 404 page not found) — this is the #1 cause of "dashboard doesn't open".
3. Keel UI — React/Vite app in ui/. Built assets in ui/dist/ are served by Keel at http://localhost:9300/ (dashboard). The Vite dev server runs on port 8000 and proxies /v1 to localhost:9300.

All commands below assume you are at the repository root (git rev-parse --show-toplevel).

Ports / URLs

Start the stack

1. Start k3s cluster (k3d)

k3d cluster create k3d-dev-cluster --api-port 0.0.0.0:6443 --agents 1 --wait
mkdir -p ~/.kube
k3d kubeconfig get k3d-dev-cluster > ~/.kube/config && chmod 600 ~/.kube/config
kubectl cluster-info && kubectl get nodes

If the cluster already exists (k3d cluster list shows it), skip creation; re-point the kubeconfig with k3d kubeconfig get. On a machine without k3d, install it (curl -fsSL https://github.com/k3d-io/k3d/releases/download/v5.9.0/k3d-linux-amd64 -o k3d && chmod +x k3d && sudo install k3d /usr/local/bin/k3d).

2. Build/install the Keel backend

Go toolchain auto-downloads (go.mod requires go 1.26.5; GOTOOLCHAIN=auto handles it):

go build ./cmd/keel   # or: go install github.com/keel-hq/keel/cmd/keel

Gotcha 1 (PATH): go install puts the binary in $(go env GOPATH)/bin (= ~/go/bin on Linux), which may not be on PATH on some machines. make run then fails with keel: No such file or directory. Launch the binary by full path ($(go env GOPATH)/bin/keel) instead.

Gotcha 2 (auth, critical): start Keel with BASIC_AUTH_USER/BASIC_AUTH_PASSWORD set, otherwise pkg/http skips registering the admin + UI routes (log line: authentication is not enabled, admin HTTP handlers are not initialized) and the dashboard 404s on every path. Launch command:

KEEL_BIN="$(go env GOPATH)/bin/keel"
setsid nohup env BASIC_AUTH_USER=admin BASIC_AUTH_PASSWORD=admin \
  "$KEEL_BIN" --no-incluster --ui-dir ui/dist > /tmp/keel-dev-server.log 2>&1 < /dev/null &

Verify: ss -ltnH | grep 9300 and tail /tmp/keel-dev-server.log (expect authentication enabled, setting up admin HTTP handlers, webhook trigger server starting... address=":9300", and resource watches started = cluster connection OK).

API creds are then admin / admin (Keel API requires HTTP basic auth: e.g. curl -u admin:admin http://localhost:9300/v1/stats).

3. Build the UI (so the dashboard works on :9300)

ui/dist does not exist by default, so the dashboard cannot be served until you build it.

cd ui
npm ci --no-audit --no-fund
npm run build   # emits ui/dist/
cd ..

Then reload http://localhost:9300/.

Gotcha: if npm ci fails with an EACCES/ownership error, the npm cache dir (e.g. ~/.npm) may be root-owned. Fix with sudo chown -R $(id -u):$(id -g) ~/.npm and retry.

4. (Optional) Vite dev server on :8000

cd ui && npm run dev -- --host 0.0.0.0   # or: make run-ui in repo root

Serves the app at http://localhost:8000/ and proxies /v1 to localhost:9300.

Gotcha: Vite binds to loopback ([::1]:8000) by default — pass --host 0.0.0.0 to make it reachable from outside the machine (http://<host-ip>:8000/). Keel (:9300) and the k3s API (:6443) already bind to 0.0.0.0 out of the box; external access to :9300/:6443 may still be gated by host firewall/security groups.

Verification checklist

• kubectl get nodes → all Ready (k3s, e.g. v1.35.5+k3s1)
• ss -ltnH | grep 9300 → listening; Keel log shows authentication enabled, setting up admin HTTP handlers and no fatal errors
• curl -s -o /dev/null -w "%{http_code}" http://localhost:9300/ → 200 (requires ui/dist built and auth enabled), not 404
• curl -s -o /dev/null -w "%{http_code}" -u admin:admin http://localhost:9300/v1/stats → 200 (401 without creds)
• curl -s -o /dev/null -w "%{http_code}" http://localhost:8000/ → 200 (Vite dev server)
• Keel log shows started watches for deployments/daemonsets/cronjobs/statefulsets (proves it is talking to the k3s cluster)

Teardown

pkill -f "keel --no-incluster"   # stop backend (or kill the recorded PID)
pkill -f "vite"                   # stop UI dev server if running
k3d cluster delete k3d-dev-cluster  # remove the k3s cluster

Logs

• Backend: /tmp/keel-dev-server.log
• UI npm install: /tmp/keel-ui-npm-ci.log

Notes / pitfalls

• ~/go/bin may not be on PATH; call the keel binary by absolute path ($(go env GOPATH)/bin/keel).
• make run = go install ... + keel --no-incluster --ui-dir ui/dist; it works only if the Go bin dir is on PATH or keel resolves.
• Dashboard 404 on :9300 is almost always one of two things: (1) ui/dist not built, or (2) Keel started without BASIC_AUTH_USER/BASIC_AUTH_PASSWORD, so the UI routes are never registered. Check the log for authentication is not enabled.
• npm cache ownership can break npm ci; fix with sudo chown -R $(id -u):$(id -g) ~/.npm.