Kubernetes使pod具有root权限

Kubernetes容器root权限

• 确认kube-api是否开启了privileged参数

[root@node1 ~]# ps -ef | grep privileged
root       5041   5016  3 Feb17 ?        00:36:37 kube-apiserver --advertise-address=172.30.201.221 --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 --insecure-port=0 --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-key-file=/etc/kubernetes/pki/sa.pub --service-cluster-ip-range=10.96.0.0/16 --tls-cert-file=/etc/kubernetes/pki/apiserver.crt --tls-private-key-file=/etc/kubernetes/pki/apiserver.key --feature-gates=RemoveSelfLink=false

可以看到  --allow-privileged=true已经开启root权限。

• 编辑pod.yaml文件

apiVersion: v1
kind: Pod
metadata:
  name: test-pod
spec:
  containers:
    - name: hello-world-container
      image: nginx:latest
      securityContext:     ###添加参数启用容器root权限
        privileged: true
        capabilities:
          add: ["SYS_ADMIN"]
        runAsUser: 0

之后可以进入容器使用root权限