Fixed failed QEMU set up in container workflow

.dockerignore

@@ -0,0 +1,7 @@
+.git
+.gitea
+.claude
+.github
+dist
+*.md
+install.sh

.gitea/workflows/container.yaml

@@ -0,0 +1,84 @@
+name: Container image
+
+# Builds the multi-arch container image. On tag push (v*) it logs in
+# to the Gitea registry on this host and publishes the image as
+# git.cer.sh/<owner>/<repo>:<version> plus :latest. On pull requests
+# it builds without pushing — purely a smoke test that the Dockerfile
+# still works.
+on:
+  push:
+    tags:
+      - 'v*'
+  pull_request:
+
+permissions:
+  contents: read
+  packages: write
+
+jobs:
+  image:
+    runs-on: ubuntu-latest
+    # The default `ubuntu-latest` label on aether-runner maps to
+    # `node:16-bullseye`, which has no docker CLI — so the docker/*
+    # actions fail. Override the job container to catthehacker's
+    # act-compatible image (ships docker CLI + buildx) and mount the
+    # host's docker socket through. The runner already has the socket
+    # bind-mounted from the host (see docker.yml gitea-runner volume),
+    # so this exposes that same daemon to the nested job container.
+    container:
+      image: catthehacker/ubuntu:act-latest
+      volumes:
+        - /var/run/docker.sock:/var/run/docker.sock
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Set up QEMU
+        uses: docker/setup-qemu-action@v3
+
+      - name: Set up Buildx
+        uses: docker/setup-buildx-action@v3
+
+      # github.repository is owner/name with the repo's original casing;
+      # registries require lowercase, so normalise once here and reuse
+      # the result in metadata-action below.
+      - name: Resolve image name
+        id: img
+        run: |
+          repo='${{ github.repository }}'
+          echo "ref=git.cer.sh/${repo,,}" >> "$GITHUB_OUTPUT"
+
+      - name: Login to Gitea registry
+        if: github.event_name == 'push'
+        uses: docker/login-action@v3
+        with:
+          registry: git.cer.sh
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Docker metadata
+        id: meta
+        uses: docker/metadata-action@v5
+        with:
+          images: ${{ steps.img.outputs.ref }}
+          tags: |
+            type=semver,pattern={{version}}
+            type=semver,pattern={{major}}.{{minor}}
+            type=raw,value=latest,enable=${{ startsWith(github.ref, 'refs/tags/v') }}
+
+      - name: Build (and push on tag)
+        uses: docker/build-push-action@v6
+        with:
+          context: .
+          file: ./Dockerfile
+          platforms: linux/amd64,linux/arm64
+          push: ${{ github.event_name == 'push' }}
+          tags: ${{ steps.meta.outputs.tags }}
+          labels: ${{ steps.meta.outputs.labels }}
+          build-args: |
+            VERSION=${{ github.ref_name }}
+          # Inline cache embeds layer metadata into the pushed image
+          # itself — no external cache server needed, which keeps the
+          # workflow self-contained on the Gitea runner.
+          cache-from: type=inline
+          cache-to: type=inline

Dockerfile

@@ -0,0 +1,41 @@
+# syntax=docker/dockerfile:1.7
+
+# Build stage. Runs on the runner's native arch (BUILDPLATFORM) and
+# cross-compiles the Go binary for whichever target the manifest list
+# is being assembled for (TARGETOS/TARGETARCH). Keeps multi-arch
+# builds fast — only the final link is per-arch, the Go toolchain is
+# always native.
+FROM --platform=$BUILDPLATFORM golang:1.24-alpine AS builder
+ARG TARGETOS
+ARG TARGETARCH
+ARG VERSION=dev
+
+WORKDIR /src
+
+# Module cache layer — re-uses unless go.mod/go.sum change.
+COPY go.mod go.sum ./
+RUN go mod download
+
+COPY . .
+
+RUN CGO_ENABLED=0 GOOS=${TARGETOS} GOARCH=${TARGETARCH} \
+    go build \
+      -trimpath \
+      -ldflags "-s -w -X main.version=${VERSION}" \
+      -o /out/qu \
+      ./cmd/qu
+
+# Runtime stage. distroless/static has CA roots for HTTPS probes and
+# nothing else — no shell, no package manager. Runs as root so the
+# daemon can open ICMP sockets and write under /etc/quptime; operators
+# can override at deploy time with `docker run --user`.
+FROM gcr.io/distroless/static-debian12:latest
+
+COPY --from=builder /out/qu /usr/local/bin/qu
+
+ENV QUPTIME_DIR=/etc/quptime
+VOLUME ["/etc/quptime"]
+EXPOSE 9901
+
+ENTRYPOINT ["/usr/local/bin/qu"]
+CMD ["serve"]

README.md

@@ -266,6 +266,7 @@ Available template variables:
 | `{{.From}}`             | previous state (`up` / `down` / `unknown`) |
 | `{{.To}}`               | new state                                  |
 | `{{.Verb}}`             | `UP` / `DOWN` / `RECOVERED`                |
+| `{{.VerbLower}}`        | lowercase form (`up` / `down` / `recovered`) |
 | `{{.Snapshot.Reports}}` | total per-node reports counted             |
 | `{{.Snapshot.OKCount}}` | how many reported OK                       |
 | `{{.Snapshot.NotOK}}`   | how many reported failure                  |
@@ -284,6 +285,81 @@ or Body template field in the add/edit alert forms.
 production traffic depends on it. A template parse or execution error
 falls back to the built-in format and is logged.
 
+### Conditionals, pipelines, and worked examples
+
+Templates use Go's `text/template` syntax, so you have `if`/`else if`/
+`else`/`end`, comparison helpers (`eq`, `ne`, `lt`, `gt`), `printf`
+pipelines, and `with` blocks. The default rendering — the one used
+when no custom template is set — lives in `internal/alerts/message.go`
+inside the `Render` function; tweak it there if you want to change
+what every alert without an override produces.
+
+A few progressively richer examples:
+
+**1. State-specific Discord copy** — different tone for `DOWN`,
+`RECOVERED`, and first-time `UP`:
+
+```yaml
+body_template: |
+  {{if eq .Verb "DOWN"}}:rotating_light: **{{.Check.Name}}** is DOWN
+  We're investigating. Last detail: `{{.Snapshot.Detail}}`
+  {{else if eq .Verb "RECOVERED"}}:white_check_mark: **{{.Check.Name}}** is back UP after a {{.From}} blip.
+  {{else}}:information_source: **{{.Check.Name}}** is online ({{.VerbLower}}).{{end}}
+```
+
+**2. SMTP subject with severity prefix and run-length detail** —
+pipes `Verb` through `printf` for padding and only mentions the
+report count when it actually matters:
+
+```yaml
+subject_template: '[{{printf "%-9s" .Verb}}] {{.Check.Name}} — {{.Check.Target}}'
+body_template: |
+  Check:    {{.Check.Name}} ({{.Check.Type}})
+  Target:   {{.Check.Target}}
+  Status:   {{.Verb}} (was {{.From}})
+  Reporter: {{.NodeID}}
+  At:       {{.When}}
+  {{if gt .Snapshot.Reports 1}}
+  Quorum:   {{.Snapshot.OKCount}} ok / {{.Snapshot.NotOK}} failing across {{.Snapshot.Reports}} reports.
+  {{end}}{{with .Snapshot.Detail}}
+  Detail:   {{.}}
+  {{end}}
+```
+
+**3. PagerDuty-style severity routing** — nest `if`/`else if` so a
+single template can produce three different first lines without
+duplicating the rest of the body:
+
+```yaml
+subject_template: >-
+  {{if eq .Verb "DOWN"}}P1: {{.Check.Name}} hard down
+  {{else if eq .Verb "RECOVERED"}}P3: {{.Check.Name}} recovered
+  {{else}}P4: {{.Check.Name}} {{.VerbLower}}{{end}}
+body_template: |
+  {{/* Header line — uses .VerbLower so the prose reads naturally */}}
+  {{.Check.Name}} ({{.Check.Target}}) is now {{.VerbLower}}.
+
+  {{if eq .Verb "DOWN"-}}
+  This is a real outage. Quorum: {{.Snapshot.NotOK}}/{{.Snapshot.Reports}} reporters see it failing.
+  Detail from the first failing probe: {{.Snapshot.Detail}}
+  Acknowledge in the runbook before paging on-call.
+  {{- else if eq .Verb "RECOVERED" -}}
+  Recovered after a {{.From}} period. No action needed; this is informational.
+  {{- else -}}
+  First successful probe after {{.From}}. Marking healthy.
+  {{- end}}
+
+  — {{.NodeID}} at {{.When}}
+```
+
+The `{{-` / `-}}` trim adjacent whitespace, which keeps the rendered
+output tidy even when the template itself is indented for readability.
+
+If a template fails to parse or panics at execute time, the
+dispatcher falls back to the default `Render` output for that field
+and logs the error — your alert still ships, you just lose the
+custom formatting until you fix the template.
+
 ## Edit cluster.yaml directly
 
 Anything you can do through the CLI you can also do by editing

install.sh

@@ -1,78 +1,82 @@
 #!/bin/bash
+set -euo pipefail
+
+INSTALL_BIN="/usr/local/bin/qu"
+SERVICE_FILE="/etc/systemd/system/qu-serve.service"
+SERVICE_USER="${SUDO_USER:-$(whoami)}"
+SERVICE_GROUP="$(id -gn "$SERVICE_USER" 2>/dev/null || echo root)"
+
+fail() {
+    echo "Error: $*" >&2
+    exit 1
+}
 
-# Helper function which echo's all commands before executing them in grayscale prefixed with >
 echo_cmd() {
     echo -e "\033[90m> $1\033[0m"
     eval "$1"
 }
 
-# Check if jq and curl are installed, if not, error out and ask the user to install them
-if ! command -v jq > /dev/null; then
-    echo "Error: jq is not installed. Please install jq and try again."
-    exit 1
-fi
-if ! command -v curl > /dev/null; then
-    echo "Error: curl is not installed. Please install curl and try again."
-    exit 1
-fi
+require_command() {
+    command -v "$1" > /dev/null 2>&1 || fail "$1 is not installed. Please install $1 and try again."
+}
 
-# Check if the user is allowed to write to /usr/local/bin, if so, install qu there, else error out and ask the user to install qu manually
-if [ -w "/usr/local/bin" ]; then
-# Get release tag by $(curl -s https://git.cer.sh/api/v1/repos/axodouble/quptime/releases/latest | jq -r '.tag_name')
-    RELEASE=$(curl -s https://git.cer.sh/api/v1/repos/axodouble/quptime/releases/latest | jq -r '.tag_name')
-    # Download the latest release binary from the Git repository and save it to /usr/local/bin/qu
-    if command -v curl > /dev/null; then
-        echo_cmd "curl -L -o \"/usr/local/bin/qu\" \"https://git.cer.sh/axodouble/quptime/releases/download/${RELEASE}/qu-${RELEASE}-linux-amd64\""
-        echo_cmd "chmod +x \"/usr/local/bin/qu\""
-        echo "> qu has been installed to /usr/local/bin/qu"
-
-        # Drop completions into the directories each shell already scans.
-        # No rc-file edits, and uninstall is just `rm`. Silently skips
-        # shells whose completion dir is absent.
-        write_completion() {
-            local shell=$1 path=$2
-            [ -d "$(dirname "$path")" ] || return 1
-            if /usr/local/bin/qu completion "$shell" > "$path" 2>/dev/null; then
-                echo "> installed $shell completion -> $path"
-                return 0
-            fi
-            rm -f "$path"
-            return 1
-        }
-        write_completion bash /usr/share/bash-completion/completions/qu \
-            || write_completion bash /etc/bash_completion.d/qu
-        write_completion zsh  /usr/share/zsh/site-functions/_qu
-        write_completion fish /usr/share/fish/vendor_completions.d/qu.fish
-    else
-        echo "Error: curl is not installed. Please install curl and try again."
-        exit 1
+write_completion() {
+    local shell=$1 path=$2
+    [ -d "$(dirname "$path")" ] || return 1
+    if "$INSTALL_BIN" completion "$shell" > "$path" 2>/dev/null; then
+        echo "> installed $shell completion -> $path"
+        return 0
     fi
-else
-    echo "Error: You are not allowed to write to /usr/local/bin. Please install qu manually, or run this script with sudo."
-    exit 1
+    rm -f "$path"
+    return 1
+}
+
+require_command jq
+require_command curl
+
+if [ ! -w "$(dirname "$INSTALL_BIN")" ]; then
+    fail "You are not allowed to write to $(dirname "$INSTALL_BIN"). Run this script with sudo or install qu manually."
 fi
 
-# Check if the user has systemd, if so create a systemd service file for qu serve
-if command -v systemctl > /dev/null; then
-    echo "> Creating systemd service file for qu serve..."
-    cat <<EOL > /etc/systemd/system/qu-serve.service
+RELEASE=$(curl -s https://git.cer.sh/api/v1/repos/axodouble/quptime/releases/latest | jq -r '.tag_name')
+
+echo_cmd "curl -L -o '$INSTALL_BIN' 'https://git.cer.sh/axodouble/quptime/releases/download/${RELEASE}/qu-${RELEASE}-linux-amd64'"
+echo_cmd "chmod +x '$INSTALL_BIN'"
+echo "> qu has been installed to $INSTALL_BIN"
+
+if "$INSTALL_BIN" --help 2>/dev/null | grep -q "completion"; then
+    write_completion bash /usr/share/bash-completion/completions/qu \
+    || write_completion bash /etc/bash_completion.d/qu || true
+    write_completion zsh /usr/share/zsh/site-functions/_qu || true
+    write_completion fish /usr/share/fish/vendor_completions.d/qu.fish || true
+else
+    echo "> qu does not expose completion support; skipping shell completion installation."
+fi
+
+if ! command -v systemctl > /dev/null 2>&1; then
+    echo "> Warning: systemd is not available on this system. qu serve will not be automatically started on boot."
+    echo "Installation complete, before starting qu serve, make sure to run qu init and read the documentation."
+    exit 0
+fi
+
+echo "> Creating systemd service file for qu serve..."
+cat > "$SERVICE_FILE" <<EOL
 [Unit]
 Description=QUptime Serve
 After=network.target
 
 [Service]
-ExecStart=/usr/local/bin/qu serve
+ExecStart=$INSTALL_BIN serve
 Restart=always
-User=$(whoami)
+User=$SERVICE_USER
+Group=$SERVICE_GROUP
 
 [Install]
 WantedBy=multi-user.target
 EOL
-    echo_cmd "systemctl daemon-reload"
-    echo_cmd "systemctl enable qu-serve.service"
-    echo "> qu serve service has been created and enabled. You can start it with 'systemctl start qu-serve.service'"
-else
-    echo "> Warning: systemd is not available on this system. qu serve will not be automatically started on boot. You can start it manually with '/usr/local/bin/qu serve'"
-fi
 
-echo "Installation complete, before starting `qu serve`, make sure to run `qu init` and read the documentation."
+echo_cmd "systemctl daemon-reload"
+echo_cmd "systemctl enable $(basename "$SERVICE_FILE")"
+echo "> qu serve service has been created and enabled. You can start it with 'systemctl start $(basename "$SERVICE_FILE")'"
+
+echo "Installation complete, before starting qu serve, make sure to run qu init and read the documentation."

internal/alerts/help.go

@@ -9,7 +9,7 @@ package alerts
 func TemplateVarsHint() string {
 	return "Go text/template — leave empty to use the built-in format.\n" +
 		"  Vars: {{.Check.Name}}, {{.Check.Target}}, {{.Check.Type}}, {{.Check.ID}},\n" +
-		"        {{.Verb}} (UP|DOWN|RECOVERED), {{.From}}, {{.To}}, {{.NodeID}}, {{.When}},\n" +
+		"        {{.Verb}} (UP|DOWN|RECOVERED), {{.VerbLower}}, {{.From}}, {{.To}}, {{.NodeID}}, {{.When}},\n" +
 		"        {{.Snapshot.Detail}}, {{.Snapshot.Reports}}, {{.Snapshot.OKCount}}, {{.Snapshot.NotOK}}"
 }
 
@@ -29,6 +29,7 @@ Available variables:
   {{.Check.Type}}        http | tcp | icmp
   {{.Check.ID}}          stable check UUID
   {{.Verb}}              UP | DOWN | RECOVERED
+  {{.VerbLower}}         lowercase form of Verb (up | down | recovered)
   {{.From}}              previous state name
   {{.To}}                new state name
   {{.NodeID}}            master node that rendered the message

internal/alerts/message.go

@@ -22,6 +22,7 @@ type TemplateContext struct {
 	From     string          // previous state name
 	To       string          // new state name
 	Verb     string          // "UP" | "DOWN" | "RECOVERED"
+	VerbLower string         // lowercase form of Verb ("up" | "down" | "recovered")
 	Snapshot checks.Snapshot // aggregate counts and detail
 	NodeID   string          // master that rendered the message
 	When     string          // RFC3339 timestamp
@@ -88,14 +89,16 @@ func RenderFor(alert *config.Alert, nodeID string, check *config.Check, from, to
 }
 
 func newContext(nodeID string, check *config.Check, from, to checks.State, snap checks.Snapshot) TemplateContext {
+	verb := transitionVerb(from, to)
 	return TemplateContext{
-		Check:    check,
-		From:     string(from),
-		To:       string(to),
-		Verb:     transitionVerb(from, to),
-		Snapshot: snap,
-		NodeID:   nodeID,
-		When:     time.Now().UTC().Format(time.RFC3339),
+		Check:     check,
+		From:      string(from),
+		To:        string(to),
+		Verb:      verb,
+		VerbLower: strings.ToLower(verb),
+		Snapshot:  snap,
+		NodeID:    nodeID,
+		When:      time.Now().UTC().Format(time.RFC3339),
 	}
 }
 

internal/config/cluster.go

@@ -91,7 +91,7 @@ type Alert struct {
 	// format. Discord ignores SubjectTemplate (it has no subject line);
 	// SMTP uses both. Available variables: {{.Check.Name}},
 	// {{.Check.Type}}, {{.Check.Target}}, {{.Check.ID}}, {{.From}},
-	// {{.To}}, {{.Verb}}, {{.Snapshot.Reports}}, {{.Snapshot.OKCount}},
+	// {{.To}}, {{.Verb}}, {{.VerbLower}}, {{.Snapshot.Reports}}, {{.Snapshot.OKCount}},
 	// {{.Snapshot.NotOK}}, {{.Snapshot.Detail}}, {{.NodeID}}, {{.When}}.
 	SubjectTemplate string `yaml:"subject_template,omitempty"`
 	BodyTemplate    string `yaml:"body_template,omitempty"`

internal/tui/forms.go

@@ -63,10 +63,27 @@ type form struct {
 	cursor int
 	busy   bool
 	err    string
+	width  int // current terminal width; inputs resize to fill it
 
 	submit func(values []string) tea.Cmd
 }
 
+// defaultFieldWidth is the fallback input width used before the first
+// WindowSizeMsg has arrived. Once we know the terminal size, inputs
+// grow to fill the available horizontal space.
+const defaultFieldWidth = 40
+
+// fieldWidthFor derives the per-input visible width from the terminal
+// width. It subtracts the modal's border+padding (6) and the form's
+// label indent (2), then a couple of chars of safety margin.
+func fieldWidthFor(termWidth int) int {
+	w := termWidth - 12
+	if w < defaultFieldWidth {
+		return defaultFieldWidth
+	}
+	return w
+}
+
 func newForm(title string, fields []formField, submit func([]string) tea.Cmd) *form {
 	for i := range fields {
 		fields[i].input.Prompt = ""
@@ -89,7 +106,7 @@ func textField(label, hint string, required bool) formField {
 // contents and can tweak instead of retyping everything.
 func textFieldWithValue(label, hint, value string, required bool) formField {
 	ti := textinput.New()
-	ti.Width = 40
+	ti.Width = defaultFieldWidth
 	ti.Placeholder = hint
 	if value != "" {
 		ti.SetValue(value)
@@ -106,7 +123,7 @@ func passwordField(label, hint string) formField {
 // the actual value leaking on-screen.
 func passwordFieldWithValue(label, hint, value string) formField {
 	ti := textinput.New()
-	ti.Width = 40
+	ti.Width = defaultFieldWidth
 	ti.Placeholder = hint
 	ti.EchoMode = textinput.EchoPassword
 	ti.EchoCharacter = '•'
@@ -148,6 +165,14 @@ func (f *form) View() string {
 
 func (f *form) Update(msg tea.Msg) (modal, tea.Cmd) {
 	switch msg := msg.(type) {
+	case tea.WindowSizeMsg:
+		f.width = msg.Width
+		w := fieldWidthFor(msg.Width)
+		for i := range f.fields {
+			f.fields[i].input.Width = w
+		}
+		return f, nil
+
 	case formSubmitErr:
 		f.busy = false
 		f.err = string(msg)

internal/tui/tui.go

@@ -132,6 +132,9 @@ func (m model) Update(msg tea.Msg) (tea.Model, tea.Cmd) {
 	case tea.WindowSizeMsg:
 		m.width, m.height = msg.Width, msg.Height
 		m.resizeTabs()
+		if m.modal != nil {
+			m.modal, _ = m.modal.Update(msg)
+		}
 		return m, nil
 
 	case tickMsg:
@@ -175,8 +178,15 @@ func (m model) Update(msg tea.Msg) (tea.Model, tea.Cmd) {
 
 	// Modal grabs all input while open.
 	if m.modal != nil {
+		prev := m.modal
 		newModal, cmd := m.modal.Update(msg)
 		m.modal = newModal
+		// If the modal handed off to a different modal (e.g. picker →
+		// form), seed the new one with the current terminal size so its
+		// text inputs can size themselves on first paint.
+		if newModal != nil && newModal != prev {
+			m.seedModalSize()
+		}
 		return m, cmd
 	}
 
@@ -223,6 +233,7 @@ func (m model) handleKey(km tea.KeyMsg) (tea.Model, tea.Cmd) {
 		return m, tea.Batch(loadStatusCmd(), loadConfigCmd())
 	case "a":
 		m.modal = m.openAddPicker()
+		m.seedModalSize()
 		return m, nil
 	case "d":
 		return m.openRemoveConfirm()
@@ -501,9 +512,20 @@ func (m model) openRemoveConfirm() (tea.Model, tea.Cmd) {
 		return m, nil
 	}
 	m.modal = newConfirm(prompt, run)
+	m.seedModalSize()
 	return m, nil
 }
 
+// seedModalSize forwards the current terminal dimensions to the modal
+// so its inputs can size themselves on first paint. Called whenever a
+// new modal is installed.
+func (m *model) seedModalSize() {
+	if m.modal == nil || m.width == 0 {
+		return
+	}
+	m.modal, _ = m.modal.Update(tea.WindowSizeMsg{Width: m.width, Height: m.height})
+}
+
 // openEditForm dispatches to the right pre-filled edit form based on the
 // active tab and the row under the cursor. Looks up the full record in
 // m.peersFull / m.checksFull / m.alerts (populated by loadConfigCmd) so
@@ -519,6 +541,7 @@ func (m model) openEditForm() (tea.Model, tea.Cmd) {
 		for i := range m.peersFull {
 			if m.peersFull[i].NodeID == id {
 				m.modal = newEditNodeForm(m.peersFull[i])
+				m.seedModalSize()
 				return m, nil
 			}
 		}
@@ -534,6 +557,7 @@ func (m model) openEditForm() (tea.Model, tea.Cmd) {
 		for i := range m.checksFull {
 			if m.checksFull[i].ID == id {
 				m.modal = newEditCheckForm(m.checksFull[i])
+				m.seedModalSize()
 				return m, nil
 			}
 		}
@@ -559,6 +583,7 @@ func (m model) openEditForm() (tea.Model, tea.Cmd) {
 				m.setFlash("unsupported alert type", flashError)
 				return m, nil
 			}
+			m.seedModalSize()
 			return m, nil
 		}
 		m.setFlash("alert not found in local cluster.yaml", flashError)