啟用 k3s 的審核日誌收集

檢視次數:

透過建立稽核政策和 webhook 配置檔案，啟用 Kubernetes 稽核日誌收集於 k3s 叢集，配置 k3s 使用這些檔案，並重新啟動服務。

重要

k3s 在 CoreDNS 啟動之前以主機進程方式運行 kube-apiserver，因此無法解析 Kubernetes 服務的 DNS 名稱。審計收集器必須使用 hostNetwork: true 並通過 127.0.0.1 連接。

步驟

建立稽核配置目錄和檔案。

執行以下命令以建立稽核政策和 webhook 配置：

sudo mkdir -p /var/lib/rancher/k3s/server/audit

sudo tee /var/lib/rancher/k3s/server/audit/audit-policy.yaml << 'EOF'
apiVersion: audit.k8s.io/v1
kind: Policy
rules:
  - level: Metadata
    verbs: ["create"]
    resources:
      - group: "authorization.k8s.io"
        resources: ["subjectaccessreviews", "selfsubjectaccessreviews", "localsubjectaccessreviews"]
  - level: RequestResponse
    verbs: ["get", "list", "watch", "create", "update", "patch", "delete"]
    resources:
      - group: "rbac.authorization.k8s.io"
        resources: ["roles", "rolebindings", "clusterroles", "clusterrolebindings"]
  - level: Metadata
    verbs: ["create", "update", "delete"]
    resources:
      - group: ""
        resources: ["serviceaccounts"]
  - level: None
EOF

sudo tee /var/lib/rancher/k3s/server/audit/audit-webhook-config.yaml << 'EOF'
apiVersion: v1
kind: Config
clusters:
- name: audit-collector
  cluster:
    server: http://127.0.0.1:8030/k8s-audit
contexts:
- context:
    cluster: audit-collector
    user: ""
  name: default-context
current-context: default-context
preferences: {}
users: []
EOF

將 k3s 配置為使用審計策略和 webhook。

編輯或建立 /etc/rancher/k3s/config.yaml：

kube-apiserver-arg:
  - "audit-policy-file=/var/lib/rancher/k3s/server/audit/audit-policy.yaml"
  - "audit-webhook-config-file=/var/lib/rancher/k3s/server/audit/audit-webhook-config.yaml"
  - "audit-webhook-batch-max-size=1"

重新啟動 k3s 以套用變更。

sudo systemctl daemon-reload
sudo systemctl restart k3s

驗證設定。

sudo systemctl status k3s
sudo journalctl -u k3s | grep -i audit