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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,168 @@ | ||
| package controller | ||
|
|
||
| import ( | ||
| "context" | ||
| "encoding/json" | ||
| "fmt" | ||
| "github.com/containerd/containerd" | ||
| "github.com/containerd/containerd/containers" | ||
| "github.com/containerd/containerd/errdefs" | ||
| "github.com/containerd/containerd/events" | ||
| "github.com/containerd/containerd/namespaces" | ||
| "github.com/containerd/containerd/oci" | ||
| "github.com/zeromicro/go-zero/core/logc" | ||
| "io" | ||
| "regexp" | ||
| "strings" | ||
| "watchlog/pkg/ctx" | ||
| "watchlog/pkg/runtime" | ||
| ) | ||
|
|
||
| var ( | ||
| create = "containerd.events.ContainerCreate" | ||
| delete = "containerd.events.ContainerDelete" | ||
| ) | ||
|
|
||
| type Containerd struct { | ||
| ctx *ctx.Context | ||
| } | ||
|
|
||
| func NewContainerInterface(ctx *ctx.Context) InterRuntime { | ||
| return &Containerd{ | ||
| ctx: ctx, | ||
| } | ||
| } | ||
|
|
||
| func (c Containerd) ProcessContainers() error { | ||
| c.ctx.Lock() | ||
| defer c.ctx.Unlock() | ||
|
|
||
| containerCtx := namespaces.WithNamespace(c.ctx.Context, "k8s.io") | ||
| c.watchEvent(c.ctx, containerCtx) | ||
|
|
||
| containers, err := c.ctx.ContainerdCli.Containers(containerCtx) | ||
| if err != nil { | ||
| logc.Errorf(context.Background(), fmt.Sprintf("get containers failed, %s", err.Error())) | ||
| return err | ||
| } | ||
|
|
||
| for _, container := range containers { | ||
| if err := c.processContainer(containerCtx, container); err != nil { | ||
| logc.Errorf(context.Background(), "process container failed: %v", err) | ||
| } | ||
| } | ||
|
|
||
| return nil | ||
| } | ||
|
|
||
| func (c Containerd) processContainer(containerCtx context.Context, container containerd.Container) error { | ||
| meta, err := container.Info(containerCtx) | ||
| if err != nil { | ||
| return fmt.Errorf("get container meta info failed: %s", err.Error()) | ||
| } | ||
|
|
||
| spec, err := container.Spec(containerCtx) | ||
| if err != nil { | ||
| return fmt.Errorf("get container spec failed: %s", err.Error()) | ||
| } | ||
|
|
||
| return processCollectFile(c.ctx, spec.Process.Env, meta) | ||
| } | ||
|
|
||
| func (c Containerd) watchEvent(ctx *ctx.Context, containerCtx context.Context) { | ||
| msgs, errs := c.ctx.ContainerdCli.EventService().Subscribe(containerCtx, "") | ||
|
|
||
| go func() { | ||
| defer logc.Info(context.Background(), "finish to watch containerd event") | ||
| logc.Infof(context.Background(), "begin to watch containerd event") | ||
|
|
||
| for { | ||
| select { | ||
| case msg := <-msgs: | ||
| if err := c.processEvent(ctx, containerCtx, msg); err != nil { | ||
| logc.Errorf(context.Background(), "process event failed: %v", err) | ||
| } | ||
| case err := <-errs: | ||
| if err == io.EOF || err == io.ErrUnexpectedEOF { | ||
| return | ||
| } | ||
| logc.Errorf(context.Background(), "event subscription error: %v", err) | ||
| } | ||
| } | ||
| }() | ||
| } | ||
|
|
||
| func (c Containerd) processEvent(ctx *ctx.Context, containerCtx context.Context, msg *events.Envelope) error { | ||
| v := string(msg.Event.GetValue()) | ||
| s := strings.TrimPrefix(v, "\n@") | ||
| containerId := removeSpecialChars(s) | ||
| containerId = strings.Split(containerId, "-")[0] | ||
|
|
||
| t := msg.Event.GetTypeUrl() | ||
| switch t { | ||
| case create: | ||
| if Exists(ctx, containerId) { | ||
| return nil | ||
| } | ||
|
|
||
| _, err := ctx.ContainerdCli.LoadContainer(containerCtx, containerId) | ||
| if err != nil { | ||
| if errdefs.IsNotFound(err) { | ||
| _, err = ctx.ContainerdCli.LoadContainer(containerCtx, containerId) | ||
| } | ||
|
|
||
| return err | ||
| } | ||
|
|
||
| meta, err := ctx.ContainerdCli.ContainerService().Get(containerCtx, containerId) | ||
| if err != nil { | ||
| return err | ||
| } | ||
|
|
||
| var spec oci.Spec | ||
| err = json.Unmarshal(meta.Spec.GetValue(), &spec) | ||
| if err != nil { | ||
| return err | ||
| } | ||
|
|
||
| err = processCollectFile(ctx, spec.Process.Env, meta) | ||
| if err != nil { | ||
| return err | ||
| } | ||
|
|
||
| return err | ||
|
|
||
| case delete: | ||
| logc.Infof(context.Background(), "Process container destroy event: %s", containerId) | ||
|
|
||
| err := DelContainerLogFile(ctx, containerId) | ||
| if err != nil { | ||
| logc.Errorf(context.Background(), fmt.Sprintf("Process container destroy event error: %s, %s", containerId, err.Error())) | ||
| } | ||
| } | ||
| return nil | ||
| } | ||
|
|
||
| func processCollectFile(c *ctx.Context, envs []string, meta containers.Container) error { | ||
| // ็ฌฆๅๆกไปถ็ Env | ||
| var logEnvs []string | ||
| for _, envVar := range envs { | ||
| // LogPrefix: aliyun_logs_tencent-prod-hermione=stdout ,envVar: aliyun_logs | ||
| if strings.HasPrefix(envVar, c.LogPrefix) { | ||
| logEnvs = append(logEnvs, envVar) | ||
| } | ||
| } | ||
|
|
||
| fields := CollectFields{ | ||
| Id: meta.ID, | ||
| Env: logEnvs, | ||
| Labels: meta.Labels, | ||
| LogPath: fmt.Sprintf("%s_%s_*/%s/*.log", meta.Labels[runtime.KubernetesContainerNamespace], meta.Labels[runtime.KubernetesPodName], meta.Labels[runtime.KubernetesContainerName]), | ||
| } | ||
| return NewCollectFile(c, fields) | ||
| } | ||
|
|
||
| func removeSpecialChars(str string) string { | ||
| re := regexp.MustCompile(`[^a-zA-Z0-9]+`) | ||
| return re.ReplaceAllString(str, "-") | ||
| } |
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