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second experiment with Go hooks
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,28 +1,15 @@ | ||
| package global_hooks | ||
|
|
||
| import "github.com/flant/addon-operator/sdk" | ||
| import ( | ||
| "github.com/flant/addon-operator/pkg/module_manager/go_hook" | ||
| "github.com/flant/addon-operator/sdk" | ||
| ) | ||
|
|
||
| var _ = sdk.Register(&GoHook{}) | ||
| var _ = sdk.RegisterFunc(&go_hook.HookConfig{ | ||
| OnStartup: &go_hook.OrderedConfig{Order: 10}, | ||
| }, handler) | ||
|
|
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| type GoHook struct { | ||
| sdk.CommonGoHook | ||
| } | ||
|
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| func (h *GoHook) Metadata() sdk.HookMetadata { | ||
| return h.CommonMetadataFromRuntime() | ||
| } | ||
|
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| func (h *GoHook) Config() *sdk.HookConfig { | ||
| return h.CommonGoHook.Config(&sdk.HookConfig{ | ||
| YamlConfig: ` | ||
| configVersion: v1 | ||
| onStartup: 10 | ||
| `, | ||
| MainHandler: h.Main, | ||
| }) | ||
| } | ||
|
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| func (h *GoHook) Main(input *sdk.BindingInput) (*sdk.BindingOutput, error) { | ||
| func handler(input *go_hook.HookInput) error { | ||
| input.LogEntry.Infof("Start Global Go hook") | ||
| return nil, nil | ||
| return nil | ||
| } |
175 changes: 41 additions & 134 deletions
175
examples/700-go-hook/modules/001-module-go-hooks/hooks/go_hooks.go
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,183 +1,90 @@ | ||
| package hooks | ||
|
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| import ( | ||
| "encoding/json" | ||
| "fmt" | ||
| "time" | ||
|
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| v1 "k8s.io/api/core/v1" | ||
| metav1 "k8s.io/apimachinery/pkg/apis/meta/v1" | ||
| "k8s.io/apimachinery/pkg/apis/meta/v1/unstructured" | ||
| "k8s.io/apimachinery/pkg/runtime" | ||
|
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| "github.com/flant/addon-operator/pkg/utils" | ||
| "github.com/flant/addon-operator/pkg/utils/values_store" | ||
| "github.com/flant/addon-operator/pkg/module_manager/go_hook" | ||
| "github.com/flant/addon-operator/sdk" | ||
|
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| "github.com/flant/shell-operator/pkg/app" | ||
| "github.com/flant/shell-operator/pkg/kube" | ||
| "github.com/flant/shell-operator/pkg/kube_events_manager/types" | ||
| "github.com/flant/shell-operator/pkg/metric_storage/operation" | ||
| ) | ||
|
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| var _ = sdk.Register(&GoHook{}) | ||
|
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| type GoHook struct { | ||
| sdk.CommonGoHook | ||
| kubeClient kube.KubernetesClient | ||
| } | ||
| type podSpecFilteredObj v1.PodSpec | ||
|
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| func (h *GoHook) Metadata() sdk.HookMetadata { | ||
| return sdk.HookMetadata{ | ||
| Name: "go_hook.go", | ||
| Path: "001-module-go-hooks/hooks/go_hook.go", | ||
| Module: true, | ||
| ModuleName: "module-go-hooks", | ||
| func (ps *podSpecFilteredObj) ApplyFilter(obj *unstructured.Unstructured) (go_hook.FilterResult, error) { | ||
| pod := &v1.Pod{} | ||
| err := go_hook.ConvertUnstructured(obj, pod) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
|
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| podSpec := pod.Spec | ||
|
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| return &podSpec, nil | ||
| } | ||
|
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| func (h *GoHook) Config() *sdk.HookConfig { | ||
| return h.CommonGoHook.Config(&sdk.HookConfig{ | ||
| OnStartup: &sdk.OrderedConfig{ | ||
| type GoHook struct{} | ||
|
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| func (h *GoHook) Config() *go_hook.HookConfig { | ||
| return &go_hook.HookConfig{ | ||
| OnStartup: &go_hook.OrderedConfig{ | ||
| Order: 10, | ||
| Handler: func(input *sdk.BindingInput) (*sdk.BindingOutput, error) { | ||
| input.LogEntry.Infof("Hello from module 'hooks-only' golang hook 'go_hooks'!\n") | ||
| return nil, nil | ||
| }, | ||
| }, | ||
|
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| OnBeforeHelm: &sdk.OrderedConfig{ | ||
| OnBeforeHelm: &go_hook.OrderedConfig{ | ||
| Order: 10, | ||
| Handler: func(input *sdk.BindingInput) (*sdk.BindingOutput, error) { | ||
| input.LogEntry.Infof("Hello from module 'hooks-only' golang hook 'go_hooks' beforeHelm!\n") | ||
| vs := values_store.NewValuesStoreFromValues(input.Values) | ||
|
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| input.LogEntry.Infof("go_hooks beforeHelm hook got values: %s", vs.GetAsYaml()) | ||
|
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| return nil, nil | ||
| }, | ||
| }, | ||
|
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| Kubernetes: []sdk.KubernetesConfig{ | ||
| Kubernetes: []go_hook.KubernetesConfig{ | ||
| { | ||
| Name: "pods-for-hooks-only", | ||
| ApiVersion: "v1", | ||
| Kind: "Pods", | ||
| IncludeSnapshotsFrom: []string{"pods"}, | ||
| //JqFilter: ".spec", | ||
| FilterFunc: func(obj *unstructured.Unstructured) (string, error) { | ||
| var pod v1.Pod | ||
| err := runtime.DefaultUnstructuredConverter. | ||
| FromUnstructured(obj.UnstructuredContent(), &pod) | ||
| if err != nil { | ||
| return "", err | ||
| } | ||
|
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| res, err := json.Marshal(pod.Spec) | ||
| if err != nil { | ||
| return "", err | ||
| } | ||
| fmt.Printf("got pod.spec: %s\n", string(res)) | ||
| return string(res), nil | ||
| }, | ||
| ExecuteHookOnEvents: []types.WatchEventType{types.WatchEventAdded, types.WatchEventModified, types.WatchEventDeleted}, | ||
| ExecuteHookOnSynchronization: true, | ||
| Handler: func(input *sdk.BindingInput) (*sdk.BindingOutput, error) { | ||
| input.LogEntry.Infof("Hello from on_kube.pods2! I have %d snapshots for '%s' event\n", | ||
| len(input.BindingContext.Snapshots), | ||
| input.BindingContext.WatchEvent) | ||
|
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| vs := values_store.NewValuesStoreFromValues(input.Values) | ||
|
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| input.LogEntry.Infof("go_hooks kube hook got values: %s", vs.GetAsYaml()) | ||
|
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| return nil, nil | ||
| }, | ||
| Name: "pods", | ||
| ApiVersion: "v1", | ||
| Kind: "Pods", | ||
| Filterable: &podSpecFilteredObj{}, | ||
| ExecuteHookOnSynchronization: go_hook.Bool(true), | ||
| }, | ||
| }, | ||
|
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| Schedule: []sdk.ScheduleConfig{ | ||
| Schedule: []go_hook.ScheduleConfig{ | ||
| { | ||
| Name: "metrics", | ||
| Crontab: "*/5 * * * * *", | ||
| Handler: h.SendMetrics, | ||
| }, | ||
| }, | ||
| }) | ||
| } | ||
|
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| // Go hook has no kubectl, but it can initialize its own kubernetes client! | ||
| func (h *GoHook) initKubeClient() error { | ||
| if h.kubeClient != nil { | ||
| return nil | ||
| } | ||
|
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| h.kubeClient = kube.NewKubernetesClient() | ||
| h.kubeClient.WithContextName(app.KubeContext) | ||
| h.kubeClient.WithConfigPath(app.KubeConfig) | ||
| h.kubeClient.WithRateLimiterSettings(app.KubeClientQps, app.KubeClientBurst) | ||
| // Initialize kube client for kube events hooks. | ||
| err := h.kubeClient.Init() | ||
| if err != nil { | ||
| return err | ||
| } | ||
| return nil | ||
| } | ||
|
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| func (h *GoHook) SendMetrics(input *sdk.BindingInput) (*sdk.BindingOutput, error) { | ||
| err := h.initKubeClient() | ||
| if err != nil { | ||
| input.LogEntry.Errorf("Fatal: initialize kube client: %s", err) | ||
| return nil, err | ||
| } | ||
|
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| podList, err := h.kubeClient.CoreV1().Pods("").List(metav1.ListOptions{}) | ||
| if err != nil { | ||
| input.LogEntry.Errorf("Fatal: cannot list pods: %s", err) | ||
| return nil, err | ||
| func (h *GoHook) Metadata() *go_hook.HookMetadata { | ||
| return &go_hook.HookMetadata{ | ||
| Name: "go_hook.go", | ||
| Path: "001-module-go-hooks/hooks/go_hook.go", | ||
| Module: true, | ||
| ModuleName: "module-go-hooks", | ||
| } | ||
| } | ||
|
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| input.LogEntry.Infof("Get %d pods:", len(podList.Items)) | ||
| for i, pod := range podList.Items { | ||
| input.LogEntry.Infof("%02d. Pod/%s in ns/%s", i, pod.Name, pod.Namespace) | ||
| func (h *GoHook) Run(input *go_hook.HookInput) error { | ||
| for _, o := range input.Snapshots["pods"] { | ||
| podSpec := o.(*podSpecFilteredObj) | ||
| input.LogEntry.Infof("Got podSpec: %+v", podSpec) | ||
| } | ||
|
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| input.LogEntry.Infof("Hello from on_kube.pods2! I have %d snapshots for '%s' event\n", | ||
| len(input.BindingContext.Snapshots), | ||
| input.BindingContext.WatchEvent) | ||
|
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| vs := values_store.NewValuesStoreFromValues(input.Values) | ||
|
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| input.LogEntry.Infof("go_hooks schedule hook got values: %s", vs.GetAsYaml()) | ||
|
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| out := &sdk.BindingOutput{ | ||
| Metrics: []operation.MetricOperation{}, | ||
| } | ||
| input.LogEntry.Infof("Hello from on_kube.pods2! I have %d snapshots\n", | ||
| len(input.Snapshots)) | ||
|
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| v := 1.0 | ||
| out.Metrics = append(out.Metrics, operation.MetricOperation{ | ||
| *input.Metrics = append(*input.Metrics, operation.MetricOperation{ | ||
| Name: "addon_go_hooks_total", | ||
| Add: &v, | ||
| }) | ||
|
|
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| out.ConfigValuesPatches = &utils.ValuesPatch{ | ||
| []*utils.ValuesPatchOperation{ | ||
| { | ||
| Op: "add", | ||
| Path: "/moduleGoHooks/time", | ||
| Value: fmt.Sprintf("%d", time.Now().Unix()), | ||
| }, | ||
| }, | ||
| } | ||
| input.ConfigValues.Set("moduleGoHooks.time", time.Now().Unix()) | ||
| input.Values.Set("moduleGoHooks.timeTemp", time.Now().Unix()) | ||
|
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| out.MemoryValuesPatches = &utils.ValuesPatch{ | ||
| []*utils.ValuesPatchOperation{ | ||
| { | ||
| Op: "add", | ||
| Path: "/moduleGoHooks/time_temp", | ||
| Value: fmt.Sprintf("%d", time.Now().Unix()), | ||
| }, | ||
| }, | ||
| } | ||
| return out, nil | ||
| return nil | ||
| } |
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