Documentation
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Overview ¶
Package reload applies a changed config file to a running daemon.
Only the vips list and logging.level reload live; a change to any other section rejects the whole reload, so the daemon either runs exactly what the file says or reports why not. Removed VIPs are withdrawn, added VIPs start withdrawn and prove health through rise, and a VIP whose checks changed keeps running its old checks until every new one has reached a verdict in shadow (make-before-break): a healthy target never withdraws for a check tweak, an unhealthy one withdraws as soon as the new check says so.
Index ¶
Constants ¶
This section is empty.
Variables ¶
This section is empty.
Functions ¶
func NewSchedulers ¶
func NewSchedulers(v *config.VIPConfig, list []*config.CheckConfig, m *metrics.Metrics, newChecker func(*config.CheckConfig) (checks.Checker, error)) ([]*checks.Scheduler, error)
NewSchedulers constructs the schedulers for the given checks of a VIP, wrapped in the local address guard when the VIP asks for it. Nothing runs yet. The daemon builds its startup schedulers with it too, so a reloaded check behaves exactly like one configured at start.
Types ¶
type Policy ¶
type Policy interface {
AddVIP(cfg *config.VIPConfig)
RemoveVIP(ctx context.Context, name string) error
CommitVIP(ctx context.Context, cfg *config.VIPConfig, seeds map[string]policy.CheckSeed) error
OnHealthTransition(t checks.HealthTransition)
OnCheckResult(vipName, checkName string, result checks.Result)
}
Policy is the part of policy.Manager a reload drives.
type Reloader ¶
type Reloader struct {
// contains filtered or unexported fields
}
Reloader holds the running config and applies new versions of the file.
func New ¶
func New(path string, cfg *config.Config, raw []byte, pol Policy, reg *checks.Registry, m *metrics.Metrics, bgpMgr *bgp.Manager, onChange func()) *Reloader
New returns a reloader for the config loaded from path. raw is the file as read at startup.
func (*Reloader) LockLogLevel ¶
func (r *Reloader) LockLogLevel()
LockLogLevel makes reloads ignore logging.level, for `run --debug`.
func (*Reloader) Reload ¶
func (r *Reloader) Reload(ctx context.Context) model.ReloadStatus
Reload reads the file and applies the difference to the running daemon. It is safe to call concurrently; attempts are serialized.
func (*Reloader) Status ¶
func (r *Reloader) Status() model.ConfigStatus
Status describes the running config and the last reload.
Source Files