Tetragon：一款基于eBPF的运行时环境安全监控工具

export NAME="$(whoami)-$RANDOM"
export ZONE="us-west2-a"
gcloud container clusters create "${NAME}" --zone ${ZONE} --num-nodes=1
gcloud container clusters get-credentials "${NAME}" --zone ${ZONE}

export NAME="$(whoami)-$RANDOM"
export AZURE_RESOURCE_GROUP="${NAME}-group"
az group create --name "${AZURE_RESOURCE_GROUP}" -l westus2
az aks create --resource-group "${AZURE_RESOURCE_GROUP}" --name "${NAME}"
az aks get-credentials --resource-group "${AZURE_RESOURCE_GROUP}" --name "${NAME}"

helm repo add cilium https://helm.cilium.io
helm repo update
helm install tetragon ${EXTRA_HELM_FLAGS[@]} cilium/tetragon -n kube-system
kubectl rollout status -n kube-system ds/tetragon -w

docker run -d --name tetragon --rm --pull always 
    --pid=host --cgroupns=host --privileged             
    -v /sys/kernel/btf/vmlinux:/var/lib/tetragon/btf    
    quay.io/cilium/tetragon:v1.3.0

kubectl edit cm -n kube-system tetragon-config
# Change your configuration setting, save and exit
# Restart Tetragon daemonset
kubectl rollout restart -n kube-system ds/tetragon

# Change configuration inside /etc/tetragon/ then restart container.
# Example:
#   1. As a privileged user, write to the file /etc/tetragon/tetragon.conf.d/export-file
#      the path where to export events, example "/var/log/tetragon/tetragon.log"
#   2. Bind mount host /etc/tetragon into container /etc/tetragon
# Tetragon events will be exported to /var/log/tetragon/tetragon.log
echo "/var/log/tetragon/tetragon.log" > /etc/tetragon/tetragon.conf.d/export-file
docker run --name tetragon --rm -d 
  --pid=host --cgroupns=host --privileged 
  -v /etc/tetragon:/etc/tetragon 
  -v /sys/kernel:/sys/kernel 
  -v /var/log/tetragon:/var/log/tetragon 
  quay.io/cilium/tetragon:v1.3.0 
  /usr/bin/tetragon

kubectl exec -ti -n kube-system ds/tetragon -c tetragon -- tetra getevents -o compact --pods xwing

POD=$(kubectl -n kube-system get pods -l 'app.kubernetes.io/name=tetragon' -o name --field-selector spec.nodeName=$(kubectl get pod xwing -o jsonpath='{.spec.nodeName}'))
kubectl exec -ti -n kube-system $POD -c tetragon -- tetra getevents -o compact --pods xwing

docker exec tetragon tetra getevents -o compact

{
  "process_exec": {
    "process": {
      "exec_id": "Z2tlLWpvaG4tNjMyLWRlZmF1bHQtcG9vbC03MDQxY2FjMC05czk1OjEzNTQ4Njc0MzIxMzczOjUyNjk5",
      "pid": 52699,
      "uid": 0,
      "cwd": "/",
      "binary": "/usr/bin/curl",
      "arguments": "https://ebpf.io/applications/#tetragon",
      "flags": "execve rootcwd",
      "start_time": "2023-10-06T22:03:57.700327580Z",
      "auid": 4294967295,
      "pod": {
        "namespace": "default",
        "name": "xwing",
        "container": {
          "id": "containerd://551e161c47d8ff0eb665438a7bcd5b4e3ef5a297282b40a92b7c77d6bd168eb3",
          "name": "spaceship",
          "image": {
            "id": "docker.io/tgraf/netperf@sha256:8e86f744bfea165fd4ce68caa05abc96500f40130b857773186401926af7e9e6",
            "name": "docker.io/tgraf/netperf:latest"
          },
          "start_time": "2023-10-06T21:52:41Z",
          "pid": 49
        },
        "pod_labels": {
          "app.kubernetes.io/name": "xwing",
          "class": "xwing",
          "org": "alliance"
        },
        "workload": "xwing"
      },
      "docker": "551e161c47d8ff0eb665438a7bcd5b4",
      "parent_exec_id": "Z2tlLWpvaG4tNjMyLWRlZmF1bHQtcG9vbC03MDQxY2FjMC05czk1OjEzNTQ4NjcwODgzMjk5OjUyNjk5",
      "tid": 52699
    },
    "parent": {
      "exec_id": "Z2tlLWpvaG4tNjMyLWRlZmF1bHQtcG9vbC03MDQxY2FjMC05czk1OjEzNTQ4NjcwODgzMjk5OjUyNjk5",
      "pid": 52699,
      "uid": 0,
      "cwd": "/",
      "binary": "/bin/bash",
      "arguments": "-c "curl https://ebpf.io/applications/#tetragon"",
      "flags": "execve rootcwd clone",
      "start_time": "2023-10-06T22:03:57.696889812Z",
      "auid": 4294967295,
      "pod": {
        "namespace": "default",
        "name": "xwing",
        "container": {
          "id": "containerd://551e161c47d8ff0eb665438a7bcd5b4e3ef5a297282b40a92b7c77d6bd168eb3",
          "name": "spaceship",
          "image": {
            "id": "docker.io/tgraf/netperf@sha256:8e86f744bfea165fd4ce68caa05abc96500f40130b857773186401926af7e9e6",
            "name": "docker.io/tgraf/netperf:latest"
          },
          "start_time": "2023-10-06T21:52:41Z",
          "pid": 49
        },
        "pod_labels": {
          "app.kubernetes.io/name": "xwing",
          "class": "xwing",
          "org": "alliance"
        },
        "workload": "xwing"
      },
      "docker": "551e161c47d8ff0eb665438a7bcd5b4",
      "parent_exec_id": "Z2tlLWpvaG4tNjMyLWRlZmF1bHQtcG9vbC03MDQxY2FjMC05czk1OjEzNTQ4NjQ1MjQ1ODM5OjUyNjg5",
      "tid": 52699
    }
  },
  "node_name": "gke-john-632-default-pool-7041cac0-9s95",
  "time": "2023-10-06T22:03:57.700326678Z"
}