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feat: use informer for agent types (#4)
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,129 @@ | ||
| package agent_types | ||
|
|
||
| import ( | ||
| "fmt" | ||
| "strings" | ||
|
|
||
| "k8s.io/client-go/informers" | ||
| "k8s.io/klog/v2" | ||
|
|
||
| v1 "k8s.io/api/core/v1" | ||
| ) | ||
|
|
||
| type AgentType struct { | ||
| SecretName string | ||
| AgentTypeName string | ||
| RegistrationToken string | ||
| AgentStartupParameters []string | ||
| } | ||
|
|
||
| type Registry struct { | ||
| agentTypes map[string]*AgentType | ||
| } | ||
|
|
||
| func NewRegistry() (*Registry, error) { | ||
| return &Registry{ | ||
| agentTypes: map[string]*AgentType{}, | ||
| }, nil | ||
| } | ||
|
|
||
| func (r *Registry) RegisterInformer(informerFactory informers.SharedInformerFactory) error { | ||
| informer := informerFactory.Core().V1().Secrets() | ||
| informer.Informer().AddEventHandler(r) | ||
| return nil | ||
| } | ||
|
|
||
| func (r *Registry) OnAdd(obj interface{}, _ bool) { | ||
| secret := obj.(*v1.Secret) | ||
| agentType, err := parseAgentType(secret) | ||
| if err != nil { | ||
| klog.Errorf("Error when adding agent type: %v", err) | ||
| return | ||
| } | ||
|
|
||
| klog.Infof("Agent type added: %s", agentType.AgentTypeName) | ||
| r.agentTypes[agentType.AgentTypeName] = agentType | ||
| } | ||
|
|
||
| func (r *Registry) OnUpdate(oldObj, newObj interface{}) { | ||
| newSecret := newObj.(*v1.Secret) | ||
| oldSecret := oldObj.(*v1.Secret) | ||
| if newSecret.ResourceVersion == oldSecret.ResourceVersion { | ||
| return | ||
| } | ||
|
|
||
| agentType, err := parseAgentType(newSecret) | ||
| if err != nil { | ||
| klog.Errorf("Error when updating agent type: %v", err) | ||
| return | ||
| } | ||
|
|
||
| klog.Infof("Agent type updated: %s", agentType.AgentTypeName) | ||
| r.agentTypes[agentType.AgentTypeName] = agentType | ||
| } | ||
|
|
||
| func (r *Registry) OnDelete(obj interface{}) { | ||
| secret := obj.(*v1.Secret) | ||
| agentTypeName, err := findAgentTypeName(secret) | ||
| if err != nil { | ||
| fmt.Printf("Error when deleting agent type: %v\n", err) | ||
| return | ||
| } | ||
|
|
||
| klog.Infof("Agent type deleted: %s", agentTypeName) | ||
| delete(r.agentTypes, agentTypeName) | ||
| } | ||
|
|
||
| func (r *Registry) All() []string { | ||
| types := []string{} | ||
| for k := range r.agentTypes { | ||
| types = append(types, k) | ||
| } | ||
|
|
||
| return types | ||
| } | ||
|
|
||
| func (r *Registry) Get(name string) *AgentType { | ||
| v, ok := r.agentTypes[name] | ||
| if !ok { | ||
| return nil | ||
| } | ||
|
|
||
| return v | ||
| } | ||
|
|
||
| func findAgentTypeName(secret *v1.Secret) (string, error) { | ||
| agentTypeName, ok := secret.Data["agentTypeName"] | ||
| if !ok { | ||
| return "", fmt.Errorf("no 'agentTypeName' field in secret '%s'", secret.GetName()) | ||
| } | ||
|
|
||
| return string(agentTypeName), nil | ||
| } | ||
|
|
||
| func parseAgentType(secret *v1.Secret) (*AgentType, error) { | ||
| agentTypeName, ok := secret.Data["agentTypeName"] | ||
| if !ok { | ||
| return nil, fmt.Errorf("no agentTypeName field in secret '%s'", secret.GetName()) | ||
| } | ||
|
|
||
| registrationToken, ok := secret.Data["registrationToken"] | ||
| if !ok { | ||
| return nil, fmt.Errorf("no registrationToken field in secret '%s'", secret.GetName()) | ||
| } | ||
|
|
||
| agentStartupParameters := []string{} | ||
| if parameters, ok := secret.Data["agentStartupParameters"]; ok && string(parameters) != "" { | ||
| for _, v := range strings.Split(string(parameters), " ") { | ||
| parameter := strings.Trim(strings.Trim(v, "\n"), " ") | ||
| agentStartupParameters = append(agentStartupParameters, parameter) | ||
| } | ||
| } | ||
|
|
||
| return &AgentType{ | ||
| SecretName: secret.GetName(), | ||
| AgentTypeName: string(agentTypeName), | ||
| RegistrationToken: string(registrationToken), | ||
| AgentStartupParameters: agentStartupParameters, | ||
| }, nil | ||
| } |
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