目录
4)发现最先创建的pod运行在k8s-master节点上,下载镜像速度太慢没法运行
k8s常用资源管理
1、创建一个pod
1)创建yuml文件
[root@k8s-master ~]# mkdir k8s
[root@k8s-master ~]# vim ./k8s/nginx.yaml
![](https://file.jishuzhan.net/article/1689978202857934850/71ddbf451194485d83cbc38cfa09cd00.png)
2)创建容器
方法一. yum安装
[root@k8s-master ~]#yum install *rhsm*
方法二 (我是用这方法解决的)
执行命令:
[root@k8s-master ~]#wget http://mirror.centos.org/centos/7/os/x86_64/Packages/python-rhsm-certificates-1.19.10-1.el7_4.x86_64.rpm
![](https://file.jishuzhan.net/article/1689978202857934850/27c134a0fc414f36a0c86cab39e58b17.png)
[root@k8s-master ~]#rpm2cpio python-rhsm-certificates-1.19.10-1.el7_4.x86_64.rpm | cpio -iv --to-stdout ./etc/rhsm/ca/redhat-uep.pem | tee /etc/rhsm/ca/redhat-uep.pem
![](https://file.jishuzhan.net/article/1689978202857934850/97afcc56e7594ca9b5791195751f3ca0.png)
前两个命令会生成/etc/rhsm/ca/redhat-uep.pem文件.
![](https://file.jishuzhan.net/article/1689978202857934850/35015022b4df44cd85b742b68e0fbd95.png)
[root@k8s-master ~]#docker pull registry.access.redhat.com/rhel7/pod-infrastructure:latest
![](https://file.jishuzhan.net/article/1689978202857934850/970f2c6a312b4cc98acb5b7639096f15.png)
[root@k8s-master ~]# kubectl create -f ./k8s/nginx.yaml
![](https://file.jishuzhan.net/article/1689978202857934850/352df1183e634ff59c58eb72236a72e7.png)
3)查看所有pod创建运行状态
[root@k8s-master ~]# kubectl get pod
![](https://file.jishuzhan.net/article/1689978202857934850/77fb7284fe404f1c9b4458ac8fed5e84.png)
4)查看指定pod资源
[root@k8s-master ~]# kubectl get pod nginx
![](https://file.jishuzhan.net/article/1689978202857934850/e8d182a1fba34990827fedba06c1d3fb.png)
5)查看pod运行的详细信息
[root@k8s-master ~]# kubectl describe pod nginx
![](https://file.jishuzhan.net/article/1689978202857934850/f28928a5d0f84a8882cd0a5bdb5c7ba5.png)
[root@k8s-master ~]# kubectl get pod nginx -o wide //显示调度节点
![](https://file.jishuzhan.net/article/1689978202857934850/66b4a82609634d08b54027a3e4294176.png)
6)验证运行的pod
[root@k8s-master ~]# kubectl get pod nginx -o wide
![](https://file.jishuzhan.net/article/1689978202857934850/6613eccebdc94739879ac9c7669c9eeb.png)
2、pod管理
1)删除pod
[root@k8s-master ~]# kubectl delete pod nginx
2)查看删除pod无法找到
[root@k8s-master ~]# kubectl get pod nginx -o wide
![](https://file.jishuzhan.net/article/1689978202857934850/565e8447a9b24f4d8d9ef36cd890bef9.png)
3)创建pod
[root@k8s-master ~]# kubectl create -f ./k8s/nginx.yaml
![](https://file.jishuzhan.net/article/1689978202857934850/e58b8bea25114c83b3359594982aa511.png)
4)发现最先创建的pod运行在k8s-master节点上,下载镜像速度太慢没法运行
[root@k8s-master ~]# kubectl get pod nginx -o wide
![](https://file.jishuzhan.net/article/1689978202857934850/02ae0eb30892495abe43087d0613d8ba.png)
5)访问pod节点中的服务
[root@k8s-master ~]# curl -I http://172.16.7.3
![](https://file.jishuzhan.net/article/1689978202857934850/56a46df61fa54e8097bd30c25e811ece.png)
3、pod操作
1)在一个pod中修改配置文件运行多个业务容器,
创建资源test1
[root@k8s-master ~]# vim ./k8s/nginx.yaml
配置如下:
apiVersion: v1
kind: Pod
metadata:
name: test1
labels:
app: web
spec:
containers:
- name: nginx01
image: nginx:1.16
ports:
- containerPort: 80
- name: busybox
image: docker.io/busybox:latest
command: ["sleep","3600"]
ports:
- containerPort: 80
![](https://file.jishuzhan.net/article/1689978202857934850/49a473448a3b429b92a71a7a749316c4.png)
[root@k8s-master ~]# kubectl create -f ./k8s/nginx.yaml
![](https://file.jishuzhan.net/article/1689978202857934850/2248511d72de4f54b4146a8e5b395376.png)
2)创建资源test2
[root@k8s-master ~]# vim ./k8s/nginx.yaml
配置如下:
apiVersion: v1
kind: Pod
metadata:
name: test2
labels:
app: web
spec:
containers:
- name: nginx01
image: nginx:1.16
ports:
- containerPort: 80
- name: busybox
image: docker.io/busybox:latest
command: ["sleep","3600"]
ports:
- containerPort: 80
![](https://file.jishuzhan.net/article/1689978202857934850/7f438ab9766b489fb91ee04962e4f574.png)
[root@k8s-master ~]# kubectl create -f ./k8s/nginx.yaml
![](https://file.jishuzhan.net/article/1689978202857934850/40a8dcf56e0c42fb9eb7224f218d9350.png)
3)查看资源使用情况
[root@k8s-master ~]# kubectl get pod -o wide
![](https://file.jishuzhan.net/article/1689978202857934850/298eea3f9f494a6598976417dd86640f.png)