修改 K8s kubelet启动参数

最近，我在虚拟机上通过rpm包安装了k8s集群。我想创建静态Pod，那么就需要更改kubelet的启动参数。相关环境信息如下：

roleOSIPmodule
Master   CentOS7.2   10.1.2.182   kube-apiserver kube-controller-manager kube-scheduler  
Node1   Centos7.2   10.1.2.183   kubelet kube-proxy  
Node2   Centos7.2   10.1.2.184   kubelet kube-proxy  
一、查看kubelet启动参数

k8s组件是通过systemctl来管理的，因此可以在/etc/systemd/system
或/usr/lib/systemd/system下查找相关配置文件

找到kubelet对应服务的配置文件目录 # cd /etc/systemd/system/kubelet.service.d/ 查看原文件内容 # cat 10-kubeadm.conf [Service] Environment="KUBELET_KUBECONFIG_ARGS=--config=/etc/kubelet.d/ --kubeconfig=/etc/kubernetes/kubelet.conf --require-kubeconfig=true" Environment="KUBELET_SYSTEM_PODS_ARGS=--pod-manifest-path=/etc/kubernetes/manifests --allow-privileged=true" Environment="KUBELET_NETWORK_ARGS=--network-plugin=cni --cni-conf-dir=/etc/cni/net.d --cni-bin-dir=/opt/cni/bin" Environment="KUBELET_DNS_ARGS=--cluster-dns=10.12.0.10 --cluster-domain=cluster.local" Environment="KUBELET_EXTRA_ARGS=--v=4" ExecStart= ExecStart=/usr/bin/kubelet $KUBELET_KUBECONFIG_ARGS $KUBELET_SYSTEM_PODS_ARGS $KUBELET_NETWORK_ARGS $KUBELET_DNS_ARGS $KUBELET_EXTR A_ARGS 查看kubelet的相关启动参数 # ps -ef | grep kubelet /usr/bin/kubelet --kubeconfig=/etc/kubernetes/kubelet.conf --require-kubeconfig=true --pod-manifest-path=/etc/kubernetes/manifests --allow-privileged=true --network-plugin=cni --cni-conf-dir=/etc/cni/net.d --cni-bin-dir=/opt/cni/bin --cluster-dns=10.12.0.10 --cluster-domain=cluster.local --v=4 二、修改kubelet启动参数

添加一个新的参数 –config

# vim 10-kubeadm.conf [Service] Environment="KUBELET_KUBECONFIG_ARGS=--config=/etc/kubelet.d/ --kubeconfig=/etc/kubernetes/kubelet.conf --require-kubeconfig=true" Environment="KUBELET_SYSTEM_PODS_ARGS=--pod-manifest-path=/etc/kubernetes/manifests --allow-privileged=true" Environment="KUBELET_NETWORK_ARGS=--network-plugin=cni --cni-conf-dir=/etc/cni/net.d --cni-bin-dir=/opt/cni/bin" Environment="KUBELET_DNS_ARGS=--cluster-dns=10.12.0.10 --cluster-domain=cluster.local" Environment="KUBELET_EXTRA_ARGS=--v=4" ExecStart= ExecStart=/usr/bin/kubelet $KUBELET_KUBECONFIG_ARGS $KUBELET_SYSTEM_PODS_ARGS $KUBELET_NETWORK_ARGS $KUBELET_DNS_ARGS $KUBELET_EXTR A_ARGS 执行如下命令使新增参数生效 # systemctl stop kubelet # systemctl daemon-reload # systemctl start kubelet 检查新增参数是否已经生效 # ps -ef | grep kubelet /usr/bin/kubelet --config=/etc/kubelet.d/ --kubeconfig=/etc/kubernetes/kubelet.conf --require-kubeconfig=true --pod-manifest-path=/etc/kubernetes/manifests --allow-privileged=true --network-plugin=cni --cni-conf-dir=/etc/cni/net.d --cni-bin-dir=/opt/cni/bin --cluster-dns=10.12.0.10 --cluster-domain=cluster.local --v=4

同理，此方法也可添加kubelet其他启动参数。