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Merge pull request #169 from Issif/kubernetes-logs
new actionner kubernetes:log
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,109 @@ | ||
| package log | ||
|
|
||
| import ( | ||
| "bytes" | ||
| "context" | ||
| "fmt" | ||
| "io" | ||
|
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| corev1 "k8s.io/api/core/v1" | ||
|
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| "github.com/Issif/falco-talon/internal/events" | ||
| kubernetes "github.com/Issif/falco-talon/internal/kubernetes/client" | ||
| "github.com/Issif/falco-talon/internal/rules" | ||
| "github.com/Issif/falco-talon/utils" | ||
| ) | ||
|
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| var Log = func(rule *rules.Rule, action *rules.Action, event *events.Event) (utils.LogLine, error) { | ||
| pod := event.GetPodName() | ||
| namespace := event.GetNamespaceName() | ||
|
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| objects := map[string]string{ | ||
| "Pod": pod, | ||
| "Namespace": namespace, | ||
| } | ||
|
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| parameters := action.GetParameters() | ||
| tailLines := new(int64) | ||
| if parameters["tail_lines"] != nil { | ||
| *tailLines = int64(parameters["tail_lines"].(int)) | ||
| } | ||
| if *tailLines == 0 { | ||
| *tailLines = 20 | ||
| } | ||
|
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| command := new(string) | ||
| if parameters["command"] != nil { | ||
| *command = parameters["command"].(string) | ||
| } | ||
|
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| client := kubernetes.GetClient() | ||
|
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| p, _ := client.GetPod(pod, namespace) | ||
| containers := kubernetes.GetContainers(p) | ||
| if len(containers) == 0 { | ||
| err := fmt.Errorf("no container found") | ||
| return utils.LogLine{ | ||
| Objects: objects, | ||
| Error: err.Error(), | ||
| Status: "failure", | ||
| }, | ||
| err | ||
| } | ||
|
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| ctx := context.Background() | ||
| var output string | ||
|
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| for i, container := range containers { | ||
| logs, err := client.Clientset.CoreV1().Pods(namespace).GetLogs(pod, &corev1.PodLogOptions{ | ||
| Container: container, | ||
| TailLines: tailLines, | ||
| }).Stream(ctx) | ||
| if err != nil { | ||
| if err != nil { | ||
| if i == len(containers)-1 { | ||
| return utils.LogLine{ | ||
| Objects: objects, | ||
| Error: err.Error(), | ||
| Status: "failure", | ||
| }, err | ||
| } | ||
| continue | ||
| } | ||
| } | ||
| defer logs.Close() | ||
|
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| buf := new(bytes.Buffer) | ||
| _, err = io.Copy(buf, logs) | ||
| if err != nil { | ||
| return utils.LogLine{ | ||
| Objects: objects, | ||
| Status: "failure", | ||
| Error: err.Error(), | ||
| }, | ||
| err | ||
| } | ||
|
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| output = buf.String() | ||
| if output != "" { | ||
| break | ||
| } | ||
| } | ||
|
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| return utils.LogLine{ | ||
| Objects: objects, | ||
| Output: output, | ||
| Status: "success", | ||
| }, | ||
| nil | ||
| } | ||
|
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| var CheckParameters = func(action *rules.Action) error { | ||
| parameters := action.GetParameters() | ||
| err := utils.CheckParameters(parameters, "tail_lines", utils.IntStr, nil, false) | ||
| if err != nil { | ||
| return err | ||
| } | ||
|
|
||
| return nil | ||
| } |
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