supervisord

Documentation

Overview

Package supervisord provides facilities for working with Supervisord.

Index

• type Logs
  • func NewLogs(pmmVersion string, pmmUpdateChecker *PMMUpdateChecker) *Logs
  • func (l *Logs) Zip(ctx context.Context, w io.Writer) error
• type PMMUpdateChecker
  • func NewPMMUpdateChecker(l *logrus.Entry) *PMMUpdateChecker
  • func (p *PMMUpdateChecker) Installed() *version.PackageInfo
• type Service
  • func New(configDir string, pmmUpdateCheck *PMMUpdateChecker) *Service
  • func (s *Service) ForceCheckUpdates() error
  • func (s *Service) InstalledPMMVersion() *version.PackageInfo
  • func (s *Service) LastCheckUpdatesResult() (*version.UpdateCheckResult, time.Time)
  • func (s *Service) Run(ctx context.Context)
  • func (s *Service) StartUpdate() (uint32, error)
  • func (s *Service) UpdateConfiguration(settings *models.Settings) error
  • func (s *Service) UpdateLog(offset uint32) ([]string, uint32, error)
  • func (s *Service) UpdateRunning() bool

Types

type Logs

type Logs struct {
	// contains filtered or unexported fields
}

Logs is responsible for interactions with logs.

func NewLogs

func NewLogs(pmmVersion string, pmmUpdateChecker *PMMUpdateChecker) *Logs

NewLogs creates a new Logs service. n is a number of last lines of log to read.

func (*Logs) Zip

func (l *Logs) Zip(ctx context.Context, w io.Writer) error

Zip creates .zip archive with all logs.

type PMMUpdateChecker

type PMMUpdateChecker struct {
	// contains filtered or unexported fields
}

PMMUpdateChecker wraps `pmm-update -installed` and `pmm-update -check` with caching.

We almost could use `supervisorctl start pmm-update-check` and then get output from stdout log file, but that is too painful, and, unlike with `pmm-update -perform`, we don't have to do it.

func NewPMMUpdateChecker

func NewPMMUpdateChecker(l *logrus.Entry) *PMMUpdateChecker

NewPMMUpdateChecker returns a PMMUpdateChecker instance that can be shared across different parts of the code. Since this is used inside this package, it could be a singleton, but it would make things mode difficult to test.

func (*PMMUpdateChecker) Installed

func (p *PMMUpdateChecker) Installed() *version.PackageInfo

Installed returns currently installed version information. It is always cached since pmm-update RPM package is always updated before pmm-managed update/restart.

type Service

type Service struct {
	// contains filtered or unexported fields
}

Service is responsible for interactions with Supervisord via supervisorctl.

func New

func New(configDir string, pmmUpdateCheck *PMMUpdateChecker) *Service

New creates new service.

func (*Service) ForceCheckUpdates

func (s *Service) ForceCheckUpdates() error

ForceCheckUpdates forces check for PMM updates. Result can be obtained via LastCheckUpdatesResult.

func (*Service) InstalledPMMVersion

func (s *Service) InstalledPMMVersion() *version.PackageInfo

InstalledPMMVersion returns currently installed PMM version information.

func (*Service) LastCheckUpdatesResult

func (s *Service) LastCheckUpdatesResult() (*version.UpdateCheckResult, time.Time)

LastCheckUpdatesResult returns last PMM update check result and last check time.

func (*Service) Run

func (s *Service) Run(ctx context.Context)

Run reads supervisord's log (maintail) and sends events to subscribers.

func (*Service) StartUpdate

func (s *Service) StartUpdate() (uint32, error)

StartUpdate starts pmm-update-perform supervisord program with some preparations. It returns initial log file offset.

func (*Service) UpdateConfiguration

func (s *Service) UpdateConfiguration(settings *models.Settings) error

UpdateConfiguration updates Prometheus, Alertmanager, and qan-api2 configurations, restarting them if needed.

func (*Service) UpdateLog

func (s *Service) UpdateLog(offset uint32) ([]string, uint32, error)

UpdateLog returns some lines and a new offset from pmm-update-perform log starting from the given offset. It may return zero lines and the same offset. Caller is expected to handle this.

func (*Service) UpdateRunning

func (s *Service) UpdateRunning() bool

UpdateRunning returns true if dashboard-upgrade or pmm-update-perform is not done yet.