mirror of https://github.com/status-im/consul.git
agent: consolidate service loading code, better logging
This commit is contained in:
Ryan Uber
parent
cfde9313de
commit
51fe9f32ff
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@ -521,48 +521,6 @@ func (a *Agent) purgeService(serviceID string) error {
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return nil
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}
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// restoreServices is used to load previously persisted service definitions
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// into the agent during startup.
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func (a *Agent) restoreServices() error {
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svcDir := filepath.Join(a.config.DataDir, servicesDir)
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if _, err := os.Stat(svcDir); os.IsNotExist(err) {
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return nil
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}
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err := filepath.Walk(svcDir, func(path string, fi os.FileInfo, err error) error {
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if err != nil {
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return err
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}
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if fi.Name() == servicesDir {
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return nil
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}
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fh, err := os.Open(filepath.Join(svcDir, fi.Name()))
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if err != nil {
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return err
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}
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content := make([]byte, fi.Size())
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if _, err := fh.Read(content); err != nil {
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return err
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}
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var svc *structs.NodeService
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if err := json.Unmarshal(content, &svc); err != nil {
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return err
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}
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if _, ok := a.state.services[svc.ID]; ok {
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// Purge previously persisted service. This allows config to be
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// preferred over services persisted from the API.
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a.logger.Printf("[DEBUG] Service %s exists, not restoring", svc.ID)
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return a.purgeService(svc.ID)
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} else {
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a.logger.Printf("[DEBUG] Restored service definition: %s", svc.ID)
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return a.AddService(svc, nil, false)
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}
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})
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return err
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}
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// persistCheck saves a check definition to the local agent's state directory
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func (a *Agent) persistCheck(check *structs.HealthCheck, chkType *CheckType) error {
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checkPath := filepath.Join(a.config.DataDir, checksDir, stringHash(check.CheckID))
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@ -600,52 +558,6 @@ func (a *Agent) purgeCheck(checkID string) error {
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return nil
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}
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// restoreChecks is used to load previously persisted health check definitions
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// into the agent during startup.
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func (a *Agent) restoreChecks() error {
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checkDir := filepath.Join(a.config.DataDir, checksDir)
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if _, err := os.Stat(checkDir); os.IsNotExist(err) {
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return nil
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}
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err := filepath.Walk(checkDir, func(path string, fi os.FileInfo, err error) error {
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if err != nil {
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return err
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}
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if fi.Name() == checksDir {
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return nil
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}
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fh, err := os.Open(filepath.Join(checkDir, fi.Name()))
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if err != nil {
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return err
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}
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content := make([]byte, fi.Size())
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if _, err := fh.Read(content); err != nil {
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return err
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}
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var p persistedCheck
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if err := json.Unmarshal(content, &p); err != nil {
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return err
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}
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if _, ok := a.state.checks[p.Check.CheckID]; ok {
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// Purge previously persisted check. This allows config to be
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// preferred over persisted checks from the API.
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a.logger.Printf("[DEBUG] Check %s exists, not restoring", p.Check.CheckID)
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return a.purgeCheck(p.Check.CheckID)
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} else {
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// Default check to critical to avoid placing potentially unhealthy
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// services into the active pool
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p.Check.Status = structs.HealthCritical
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a.logger.Printf("[DEBUG] Restored health check: %s", p.Check.CheckID)
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return a.AddCheck(p.Check, p.ChkType, false)
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}
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})
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return err
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}
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// AddService is used to add a service entry.
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// This entry is persistent and the agent will make a best effort to
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// ensure it is registered
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@ -908,12 +820,48 @@ func (a *Agent) loadServices(conf *Config) error {
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}
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// Load any persisted services
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if err := a.restoreServices(); err != nil {
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return fmt.Errorf("Failed restoring services: %s", err)
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svcDir := filepath.Join(a.config.DataDir, servicesDir)
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if _, err := os.Stat(svcDir); os.IsNotExist(err) {
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return nil
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}
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err := filepath.Walk(svcDir, func(path string, fi os.FileInfo, err error) error {
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if err != nil {
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return err
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}
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if fi.Name() == servicesDir {
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return nil
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}
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filePath := filepath.Join(svcDir, fi.Name())
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fh, err := os.Open(filePath)
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if err != nil {
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return err
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}
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content := make([]byte, fi.Size())
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if _, err := fh.Read(content); err != nil {
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return err
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}
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var svc *structs.NodeService
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if err := json.Unmarshal(content, &svc); err != nil {
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return err
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}
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if _, ok := a.state.services[svc.ID]; ok {
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// Purge previously persisted service. This allows config to be
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// preferred over services persisted from the API.
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a.logger.Printf("[DEBUG] Service %q exists, not restoring from %q",
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svc.ID, filePath)
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return a.purgeService(svc.ID)
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} else {
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a.logger.Printf("[DEBUG] Restored service definition %q from %q",
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svc.ID, filePath)
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return a.AddService(svc, nil, false)
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}
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})
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return err
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}
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// unloadServices will deregister all services other than the 'consul' service
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// known to the local agent.
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@ -943,12 +891,52 @@ func (a *Agent) loadChecks(conf *Config) error {
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}
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// Load any persisted checks
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if err := a.restoreChecks(); err != nil {
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return fmt.Errorf("Failed restoring checks: %s", err)
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checkDir := filepath.Join(a.config.DataDir, checksDir)
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if _, err := os.Stat(checkDir); os.IsNotExist(err) {
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return nil
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}
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err := filepath.Walk(checkDir, func(path string, fi os.FileInfo, err error) error {
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if err != nil {
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return err
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}
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if fi.Name() == checksDir {
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return nil
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}
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filePath := filepath.Join(checkDir, fi.Name())
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fh, err := os.Open(filePath)
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if err != nil {
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return err
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}
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content := make([]byte, fi.Size())
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if _, err := fh.Read(content); err != nil {
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return err
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}
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var p persistedCheck
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if err := json.Unmarshal(content, &p); err != nil {
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return err
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}
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if _, ok := a.state.checks[p.Check.CheckID]; ok {
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// Purge previously persisted check. This allows config to be
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// preferred over persisted checks from the API.
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a.logger.Printf("[DEBUG] Check %q exists, not restoring from %q",
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p.Check.CheckID, filePath)
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return a.purgeCheck(p.Check.CheckID)
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} else {
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// Default check to critical to avoid placing potentially unhealthy
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// services into the active pool
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p.Check.Status = structs.HealthCritical
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a.logger.Printf("[DEBUG] Restored health check %q from %q",
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p.Check.CheckID, filePath)
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return a.AddCheck(p.Check, p.ChkType, false)
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}
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})
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return err
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}
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// unloadChecks will deregister all checks known to the local agent.
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func (a *Agent) unloadChecks() error {
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