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小编给大家分享一下Kubernetes配置文件目录结构怎么看，希望大家阅读完这篇文章之后都有所收获，下面让我们一起去探讨吧！
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Kubernetes的配置目录包括/etc/kubernetes、/home/supermap/.kube和/var/lib/kubelet目录。
下面我们来看一看，这些目录里到底有些什么文件（操作系统使用Ubuntu 18.04LTS desktop）。
安装tree命令：
sudo apt install tree
显示/etc/kubernetes目录结构：
supermap@podc01:/etc/kubernetes$ tree . . ├── admin.conf ├── controller-manager.conf ├── kubelet.conf ├── manifests │ ├── etcd.yaml │ ├── kube-apiserver.yaml │ ├── kube-controller-manager.yaml │ └── kube-scheduler.yaml ├── pki │ ├── apiserver.crt │ ├── apiserver-etcd-client.crt │ ├── apiserver-etcd-client.key │ ├── apiserver.key │ ├── apiserver-kubelet-client.crt │ ├── apiserver-kubelet-client.key │ ├── ca.crt │ ├── ca.key │ ├── etcd │ │ ├── ca.crt │ │ ├── ca.key │ │ ├── healthcheck-client.crt │ │ ├── healthcheck-client.key │ │ ├── peer.crt │ │ ├── peer.key │ │ ├── server.crt │ │ └── server.key │ ├── front-proxy-ca.crt │ ├── front-proxy-ca.key │ ├── front-proxy-client.crt │ ├── front-proxy-client.key │ ├── sa.key │ └── sa.pub ├── scheduler.conf └── tmp [error opening dir] 4 directories, 30 files
主用户目录下的隐藏目录.kube包含用户的配置参数和缓存数据。目录结构为：
/home/supermap/.kube ├── cache │ └── discovery │ ├── 10.1.1.181_6443 │ └── 10.1.1.201_6443 ├── config └── http-cache ├── 028d83935e12ce471cbe29f4096ef4ed
其中，配置文件config的内容为：
apiVersion: v1
clusters:
- cluster:
certificate-authority-data: LS0tLS1CRUdJTiBDRVJUSUZJQ0FURS0tLS0t...
server: https://10.1.1.201:6443
name: kubernetes
contexts:
- context:
cluster: kubernetes
user: kubernetes-admin
name: kubernetes-admin@kubernetes
current-context: kubernetes-admin@kubernetes
kind: Config
preferences: {}
users:
- name: kubernetes-admin
user:
client-certificate-data: LS0tLS1CRUdJTiBDRVJUSUZJQ0FURS0tLS0tCk1...
client-key-data: LS0tLS1CRUdJTiBSU0EgUFJJVkFURSBLRVktLS0tLQpNSUl...每一个ks节点都需要运行kubelet服务。kubelet服务的配置在/var/lib/kubelet目录下：
supermap@podc01:/var/lib/kubelet$ tree . ├── config.yaml ├── cpu_manager_state ├── device-plugins │ ├── DEPRECATION │ ├── kubelet_internal_checkpoint │ └── kubelet.sock ├── kubeadm-flags.env ├── pki │ ├── kubelet-client-2018-11-23-10-08-12.pem │ ├── kubelet-client-2018-11-23-10-08-38.pem │ ├── kubelet-client-current.pem -> /var/lib/kubelet/pki/kubelet-client-2018-11-23-10-08-38.pem │ ├── kubelet.crt │ └── kubelet.key ├── plugin-containers [error opening dir] ├── plugins [error opening dir] ├── plugins_registry [error opening dir] ├── pod-resources [error opening dir] └── pods [error opening dir] 7 directories, 11 files
kubelet使用systemd管理，service定义文件位于： /lib/systemd/system/kubelet.service。
最新的dropin文件位于： /etc/systemd/system/kubelet.service.d，内容为：
supermap@podc01:/etc/systemd/system/kubelet.service.d$ cat 10-kubeadm.conf # Note: This dropin only works with kubeadm and kubelet v1.11+ [Service] Environment="KUBELET_KUBECONFIG_ARGS=--bootstrap-kubeconfig=/etc/kubernetes/bootstrap-kubelet.conf --kubeconfig=/etc/kubernetes/kubelet.conf" Environment="KUBELET_CONFIG_ARGS=--config=/var/lib/kubelet/config.yaml" # This is a file that "kubeadm init" and "kubeadm join" generates at runtime, populating the KUBELET_KUBEADM_ARGS variable dynamically EnvironmentFile=-/var/lib/kubelet/kubeadm-flags.env # This is a file that the user can use for overrides of the kubelet args as a last resort. Preferably, the user should use # the .NodeRegistration.KubeletExtraArgs object in the configuration files instead. KUBELET_EXTRA_ARGS should be sourced from this file. EnvironmentFile=-/etc/default/kubelet ExecStart= ExecStart=/usr/bin/kubelet $KUBELET_KUBECONFIG_ARGS $KUBELET_CONFIG_ARGS $KUBELET_KUBEADM_ARGS $KUBELET_EXTRA_ARGS
可以看到，在新的kubernetes配置结构中，这个kublet服务参数的配置有了很大的变化。启动参数不再放在kubelet.service文件里了，放到了/var/lib/kubelet、/etc/default/kubelet。
注意，这个变化可能会导致以前的很多手动安装的脚本工具不再可用。
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