[k8s]k8s架构图解
k8s架构图解
启动参数及证书梳理
master端必须要装flannel
注: flannel网络能确保各节点间 Pod 网段实现互通
master 节点与 node 节点上的 Pods 通过 Pod 网络通信，所以需要在 master 节点上部署 Flannel 网络。
外部访问集群的方式:
- 1,ingress
- 2,通过apiserver 这种方式结合kube-proxy
kubectl proxy --address='10.64.3.7' --port=8086 --accept-hosts='^*$'
可以做一些内部url的一些限制.
浏览器访问 URL：http://10.64.3.7:8086/ui 自动跳转到：http://10.64.3.7:8086/api/v1/proxy/namespaces/kube-system/services/kubernetes-dashboard/#/workload?namespace=default
如果不做kubectl proxy 则意味着外界访问api没任何限制,加上后可以做一些限制.
kubectl proxy -h
...
Options:
--accept-hosts='^localhost$,^127\.0\.0\.1$,^\[::1\]$': Regular expression for hosts that the proxy should accept.
--accept-paths='^.*': Regular expression for paths that the proxy should accept.
--address='127.0.0.1': The IP address on which to serve on.
--api-prefix='/': Prefix to serve the proxied API under.
--disable-filter=false: If true, disable request filtering in the proxy. This is dangerous, and can leave you
vulnerable to XSRF attacks, when used with an accessible port.
-p, --port=8001: The port on which to run the proxy. Set to 0 to pick a random port.
--reject-methods='POST,PUT,PATCH': Regular expression for HTTP methods that the proxy should reject.
--reject-paths='^/api/.*/pods/.*/exec,^/api/.*/pods/.*/attach': Regular expression for paths that the proxy should
reject.
-u, --unix-socket='': Unix socket on which to run the proxy.
-w, --www='': Also serve static files from the given directory under the specified prefix.
-P, --www-prefix='/static/': Prefix to serve static files under, if static file directory is specified.
Usage:
kubectl proxy [--port=PORT] [--www=static-dir] [--www-prefix=prefix] [--api-prefix=prefix] [options]
我认为 kubectl proxy --address='10.64.3.7' --port=8086 --accept-hosts='^*$' 不止可以加访问acl一个功能,还修改了监听地址.不然外界也访问不到.
[root@master]# kubectl clusterinfo
Command "clusterinfo" is deprecated, use "cluster-info" instead
Kubernetes master is running at http://localhost:8080
Heapster is running at http://localhost:8080/api/v1/namespaces/kube-system/services/heapster/proxy
KubeDNS is running at http://localhost:8080/api/v1/namespaces/kube-system/services/kube-dns/proxy
kubernetes-dashboard is running at http://localhost:8080/api/v1/namespaces/kube-system/services/kubernetes-dashboard/proxy
kube cluster info显示的内容由什么控制?
参考:https://kubernetes-v1-4.github.io/docs/user-guide/kubectl/kubectl_cluster-info/
Display addresses of the master and services with label kubernetes.io/cluster-service=true
apiVersion: v1
kind: Service
metadata:
name: kubernetes-dashboard
namespace: kube-system
labels:
k8s-app: kubernetes-dashboard
kubernetes.io/cluster-service: "true" #只需要加上这句就可以cluster-info显示了,就可以直接通过kube-proxy访问了
