Adolfo Delorenzo
bce565e2f7
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Phase 5 of v0.3. Adds an explicit, on-disk state machine to the update agent
so the lifecycle of an attempt is observable end-to-end, instead of being
inferred from logs and side effects.
New package update/pkg/state:
- Phase enum (idle, checking, downloading, staged, activated, verifying,
success, rolled_back, failed)
- UpdateState struct persisted to /var/lib/kubesolo/update/state.json
(overridable via --state). Atomic write (.tmp + rename). Survives reboots
and slot switches because the file lives on the data partition.
- Transition helper that bumps AttemptCount when an attempt starts, resets
it when the target version changes, sets/clears LastError on
failed/success transitions, and stamps StartedAt + UpdatedAt.
- 13 unit tests cover the lifecycle, atomic write, version-change reset,
error recording, idempotent SetFromVersion, garbage-file handling.
Wired into the existing commands:
- apply.go transitions Idle -> Checking -> Downloading -> Staged, with
RecordError on any step failure. Reads the active slot's version file to
populate FromVersion.
- activate.go transitions to Activated.
- healthcheck.go transitions Activated -> Verifying -> Success on pass,
or to Failed on fail. Skips transitions if state isn't post-activation
(manual healthcheck on a stable system shouldn't churn the state).
- rollback.go transitions to RolledBack with LastError="manual rollback".
- check.go intentionally untouched — checks are passive queries, not
attempts; they shouldn't reset AttemptCount.
status.go gains a --json mode that emits the full state report (A/B slots,
boot counter, full UpdateState) for orchestration tooling. Human-readable
mode also prints an Update Lifecycle section when state.phase != idle.
pkg/metrics gains three new series, derived from state.json at scrape time:
- kubesolo_update_phase{phase="..."} — 1 for current, 0 for all others;
all nine phase values always emitted so dashboards see complete series
- kubesolo_update_attempts_total
- kubesolo_update_last_attempt_timestamp_seconds
Server.SetStatePath() configures the file location; defaults to absent
which emits Idle defaults. Three new tests cover the absent / active /
all-phases-emitted cases.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
56 lines
1.8 KiB
Go
56 lines
1.8 KiB
Go
package cmd
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import (
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"fmt"
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"log/slog"
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"github.com/portainer/kubesolo-os/update/pkg/state"
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)
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// Activate switches the boot target to the passive partition.
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// After activation, the next reboot will boot from the new partition
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// with boot_counter=3. If health checks fail 3 times, GRUB auto-rolls back.
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//
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// State transition: Staged → Activated. On failure → Failed.
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func Activate(args []string) error {
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opts := parseOpts(args)
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env := opts.NewBootEnv()
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st, err := state.Load(opts.StatePath)
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if err != nil {
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slog.Warn("state file unreadable, starting fresh", "error", err)
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st = state.New()
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}
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// Get passive slot (the one we want to boot into)
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passiveSlot, err := env.PassiveSlot()
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if err != nil {
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_ = st.RecordError(opts.StatePath, fmt.Errorf("reading passive slot: %w", err))
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return fmt.Errorf("reading passive slot: %w", err)
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}
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activeSlot, err := env.ActiveSlot()
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if err != nil {
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_ = st.RecordError(opts.StatePath, fmt.Errorf("reading active slot: %w", err))
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return fmt.Errorf("reading active slot: %w", err)
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}
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slog.Info("activating slot", "from", activeSlot, "to", passiveSlot)
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// Set the passive slot as active with fresh boot counter
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if err := env.ActivateSlot(passiveSlot); err != nil {
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_ = st.RecordError(opts.StatePath, fmt.Errorf("activating slot %s: %w", passiveSlot, err))
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return fmt.Errorf("activating slot %s: %w", passiveSlot, err)
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}
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if err := st.Transition(opts.StatePath, state.PhaseActivated, "", ""); err != nil {
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slog.Warn("state transition failed", "phase", state.PhaseActivated, "error", err)
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}
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fmt.Printf("Slot %s activated (was %s)\n", passiveSlot, activeSlot)
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fmt.Println("Boot counter set to 3. Reboot to start the new version.")
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fmt.Println("The system will automatically roll back if health checks fail 3 times.")
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return nil
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}
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