mirror of
https://github.com/mailcow/mailcow-dockerized.git
synced 2026-06-11 17:10:28 +00:00
FreddleSpl0it
88 lines
2.9 KiB
Go
88 lines
2.9 KiB
Go
// Package services registers per-service command tables. The agent selects
|
|
// the right table at startup via MAILCOW_AGENT_SERVICE.
|
|
//
|
|
// A service "builder" receives a Supervisor for lifecycle commands; services
|
|
// that don't supervise a main process (currently just "host") pass nil and
|
|
// the generic lifecycle commands are skipped.
|
|
package services
|
|
|
|
import (
|
|
"context"
|
|
"fmt"
|
|
"time"
|
|
|
|
"github.com/mailcow/mailcow-dockerized/agent/internal/commands"
|
|
"github.com/mailcow/mailcow-dockerized/agent/internal/proc"
|
|
)
|
|
|
|
// Builder constructs a command table for a service. sup may be nil for
|
|
// services without a supervised main process.
|
|
type Builder func(sup *proc.Supervisor) *commands.Table
|
|
|
|
var registry = map[string]Builder{}
|
|
|
|
// Register installs a builder for a service name. Called from init() in each
|
|
// per-service file.
|
|
func Register(service string, b Builder) {
|
|
if _, dup := registry[service]; dup {
|
|
panic("services: duplicate registration for " + service)
|
|
}
|
|
registry[service] = b
|
|
}
|
|
|
|
// Build returns the table for service, or an error if no builder exists.
|
|
func Build(service string, sup *proc.Supervisor) (*commands.Table, error) {
|
|
b, ok := registry[service]
|
|
if !ok {
|
|
return nil, fmt.Errorf("services: unknown service %q (set MAILCOW_AGENT_SERVICE correctly)", service)
|
|
}
|
|
return b(sup), nil
|
|
}
|
|
|
|
// Known returns the list of registered service names (sorted-ish, depends on
|
|
// map iteration — for help output only).
|
|
func Known() []string {
|
|
out := make([]string, 0, len(registry))
|
|
for k := range registry {
|
|
out = append(out, k)
|
|
}
|
|
return out
|
|
}
|
|
|
|
// restartSettle is how long we wait after a Start to verify the new child
|
|
// didn't immediately crash. Gives the operator real "did the service come
|
|
// back up?" feedback instead of an instant OK that hides flapping services.
|
|
const restartSettle = 3 * time.Second
|
|
|
|
// addLifecycle wires reload/restart/stop/start onto t backed by sup. Services
|
|
// override these (e.g. postfix overrides reload to run `postfix reload`).
|
|
func addLifecycle(t *commands.Table, sup *proc.Supervisor) {
|
|
if sup == nil {
|
|
return
|
|
}
|
|
t.Register("reload", func(ctx context.Context, _ map[string]any) (any, error) {
|
|
return nil, sup.Reload()
|
|
})
|
|
t.Register("restart", func(ctx context.Context, _ map[string]any) (any, error) {
|
|
if err := sup.Restart(ctx); err != nil {
|
|
return nil, err
|
|
}
|
|
if err := sup.WaitStable(ctx, restartSettle); err != nil {
|
|
return nil, err
|
|
}
|
|
return map[string]any{"status": "restarted", "settled_ms": int(restartSettle / time.Millisecond)}, nil
|
|
})
|
|
t.Register("stop", func(ctx context.Context, _ map[string]any) (any, error) {
|
|
return nil, sup.Stop(ctx)
|
|
})
|
|
t.Register("start", func(ctx context.Context, _ map[string]any) (any, error) {
|
|
if err := sup.Start(); err != nil {
|
|
return nil, err
|
|
}
|
|
if err := sup.WaitStable(ctx, restartSettle); err != nil {
|
|
return nil, err
|
|
}
|
|
return map[string]any{"status": "started", "settled_ms": int(restartSettle / time.Millisecond)}, nil
|
|
})
|
|
}
|