记得添加，把配置文件挂载进去
- mountPath: /etc/kubernetes/audit
name: audit-policy
readOnly: true
.....
- hostPath:
path: /etc/kubernetes/audit/
type: DirectoryOrCreate
name: audit-policy
/etc/kubernetes/manifests/kube-apiserver.yaml 具体配置文件如下
apiVersion: v1
kind: Pod
metadata:
annotations:
kubeadm.kubernetes.io/kube-apiserver.advertise-address.endpoint: 10.211.55.4:6443
creationTimestamp: null
labels:
component: kube-apiserver
tier: control-plane
name: kube-apiserver
namespace: kube-system
spec:
containers:
- command:
- kube-apiserver
- --advertise-address=10.211.55.4
- --allow-privileged=true
- --authorization-mode=Node,RBAC
- --client-ca-file=/etc/kubernetes/pki/ca.crt
- --enable-admission-plugins=NodeRestriction
- --enable-bootstrap-token-auth=true
- --etcd-cafile=/etc/kubernetes/pki/etcd/ca.crt
- --etcd-certfile=/etc/kubernetes/pki/apiserver-etcd-client.crt
- --etcd-keyfile=/etc/kubernetes/pki/apiserver-etcd-client.key
- --etcd-servers=https://127.0.0.1:2379
- --kubelet-client-certificate=/etc/kubernetes/pki/apiserver-kubelet-client.crt
- --kubelet-client-key=/etc/kubernetes/pki/apiserver-kubelet-client.key
- --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname
- --proxy-client-cert-file=/etc/kubernetes/pki/front-proxy-client.crt
- --proxy-client-key-file=/etc/kubernetes/pki/front-proxy-client.key
- --requestheader-allowed-names=front-proxy-client
- --requestheader-client-ca-file=/etc/kubernetes/pki/front-proxy-ca.crt
- --requestheader-extra-headers-prefix=X-Remote-Extra-
- --requestheader-group-headers=X-Remote-Group
- --requestheader-username-headers=X-Remote-User
- --secure-port=6443
- --service-account-issuer=https://kubernetes.default.svc.cluster.local
- --service-account-key-file=/etc/kubernetes/pki/sa.pub
- --service-account-signing-key-file=/etc/kubernetes/pki/sa.key
- --service-cluster-ip-range=10.96.0.0/12
- --tls-cert-file=/etc/kubernetes/pki/apiserver.crt
- --tls-private-key-file=/etc/kubernetes/pki/apiserver.key
- --audit-log-path=/var/log/kubernetes/audit/audit.log
- --audit-policy-file=/etc/kubernetes/audit/audit-default-policy.yaml
image: registry.aliyuncs.com/google_containers/kube-apiserver:v1.23.17
imagePullPolicy: IfNotPresent
livenessProbe:
failureThreshold: 8
httpGet:
host: 10.211.55.4
path: /livez
port: 6443
scheme: HTTPS
initialDelaySeconds: 10
periodSeconds: 10
timeoutSeconds: 15
name: kube-apiserver
readinessProbe:
failureThreshold: 3
httpGet:
host: 10.211.55.4
path: /readyz
port: 6443
scheme: HTTPS
periodSeconds: 1
timeoutSeconds: 15
resources:
requests:
cpu: 250m
startupProbe:
failureThreshold: 24
httpGet:
host: 10.211.55.4
path: /livez
port: 6443
scheme: HTTPS
initialDelaySeconds: 10
periodSeconds: 10
timeoutSeconds: 15
volumeMounts:
- mountPath: /etc/ssl/certs
name: ca-certs
readOnly: true
- mountPath: /etc/ca-certificates
name: etc-ca-certificates
readOnly: true
- mountPath: /etc/pki
name: etc-pki
readOnly: true
- mountPath: /etc/kubernetes/pki
name: k8s-certs
readOnly: true
- mountPath: /usr/local/share/ca-certificates
name: usr-local-share-ca-certificates
readOnly: true
- mountPath: /usr/share/ca-certificates
name: usr-share-ca-certificates
readOnly: true
- mountPath: /etc/kubernetes/audit
name: audit-policy
readOnly: true
hostNetwork: true
priorityClassName: system-node-critical
securityContext:
seccompProfile:
type: RuntimeDefault
volumes:
- hostPath:
path: /etc/ssl/certs
type: DirectoryOrCreate
name: ca-certs
- hostPath:
path: /etc/ca-certificates
type: DirectoryOrCreate
name: etc-ca-certificates
- hostPath:
path: /etc/pki
type: DirectoryOrCreate
name: etc-pki
- hostPath:
path: /etc/kubernetes/pki
type: DirectoryOrCreate
name: k8s-certs
- hostPath:
path: /usr/local/share/ca-certificates
type: DirectoryOrCreate
name: usr-local-share-ca-certificates
- hostPath:
path: /usr/share/ca-certificates
type: DirectoryOrCreate
name: usr-share-ca-certificates
- hostPath:
path: /etc/kubernetes/audit/
type: DirectoryOrCreate
name: audit-policy
status: {}
策略文件如下所示
apiVersion: audit.k8s.io/v1
kind: Policy
rules:
# do not log requests to the following
- level: None
nonResourceURLs:
- "/healthz*"
- "/logs"
- "/metrics"
- "/swagger*"
- "/version"
# limit level to Metadata so token is not included in the spec/status
- level: Metadata
omitStages:
- RequestReceived
resources:
- group: authentication.k8s.io
resources:
- tokenreviews
# extended audit of auth delegation
- level: RequestResponse
omitStages:
- RequestReceived
resources:
- group: authorization.k8s.io
resources:
- subjectaccessreviews
# log changes to pods at RequestResponse level
- level: RequestResponse
omitStages:
- RequestReceived
resources:
- group: "" # core API group; add third-party API services and your API services if needed
resources: ["pods"]
verbs: ["create", "patch", "update", "delete"]
# log everything else at Metadata level
- level: Metadata
omitStages:
- RequestReceived
http://elkeid.bytedance.com/docs/ElkeidData/k8s_rule.html
https://www.armosec.io/blog/kubernetes-audit-log-security/
https://www.datadoghq.com/blog/key-kubernetes-audit-logs-for-monitoring-cluster-security/
https://sysdig.com/learn-cloud-native/kubernetes-security/kubernetes-audit-log/
https://www.datadoghq.com/blog/monitor-kubernetes-audit-logs/#what-are-kubernetes-audit-logshttps://www.youtube.com/watch?v=h0h9QWhGFS4
Reference table for all security alerts - Microsoft Defender for Cloud | Microsoft Learn