搭建docker私有仓库，建立k8s集群
服务器IP角色分布
192.168.5.2 etcd server
192.168.5.2 kubernetes master
192.168.5.3 kubernetes node
192.168.5.4 kubernetes node
确认环境
centos7
确认liunx内核版本 uname -a
yum update
systemctl start firewalld.service#启动firewall
systemctl stop firewalld.service#停止firewall
systemctl disable firewalld.service#禁止firewall开机启动
yum -y install ntp
systemctl start ntpd
systemctl enable ntpd
软件安装
etcd
yum install etcd -y
master
yum install kubernetes-master -y
node
yum install kubernetes-node flannel docker -y
各组件用途
kube master
kube-apiserver
kube-scheduer
kube-controller-manager
etcd配置启动
egrep -v “^#” /etc/etcd/etcd.conf
ETCD_NAME=default
ETCD_DATA_DIR="/var/lib/etcd/default.etcd"
ETCD_LISTEN_CLIENT_URLS="http://0.0.0.0:2379"
ETCD_ADVERTISE_CLIENT_URLS="http://192.168.5.2:2379"
[root@Control k8s]# cat etcd_start.sh
systemctl enable etcd
systemctl start etcd
ss -antl 检查2379是否成功
master服务配置启动
[root@Control k8s]# egrep -v '^#' /etc/kubernetes/apiserver | grep -v '^$'
KUBE_API_ADDRESS="--insecure-bind-address=0.0.0.0"
KUBE_ETCD_SERVERS="--etcd-servers=http://192.168.5.2:2379"
KUBE_SERVICE_ADDRESSES="--service-cluster-ip-range=10.254.0.0/16"
KUBE_ADMISSION_CONTROL="--admission-control=NamespaceLifecycle,NamespaceExists,LimitRanger,SecurityContextDeny,ServiceAccount,ResourceQuota"
KUBE_API_ARGS=""
[root@Control k8s]# egrep -v '^#' /etc/kubernetes/controller-manager |grep -v '^$'
KUBE_CONTROLLER_MANAGER_ARGS="--node-monitor-grace-period=10s --pod-eviction-timeout=10s"
[root@Control k8s]# egrep -v '^#' /etc/kubernetes/config | egrep -v '^$'
KUBE_LOGTOSTDERR="--logtostderr=true"
KUBE_LOG_LEVEL="--v=0"
KUBE_ALLOW_PRIV="--allow-privileged=false"
KUBE_MASTER="--master=http://192.168.5.2:8080"
[root@Control k8s]# cat master_start.sh
systemctl enable kube-apiserver kube-scheduler kube-controller-manager
systemctl start kube-apiserver kube-scheduler kube-controller-manager
ss -antl 检查8080是否成功
node服务配置启动
[root@Resources-s1 k8s]# egrep -v '^#' /etc/kubernetes/config | grep -v '^$'
KUBE_LOGTOSTDERR="--logtostderr=true"
KUBE_LOG_LEVEL="--v=0"
KUBE_ALLOW_PRIV="--allow-privileged=false"
KUBE_MASTER="--master=http://192.168.5.2:8080"
[root@Resources-s1 k8s]# egrep -v '^#' /etc/kubernetes/kubelet | grep -v '^$'
KUBELET_ADDRESS="--address=127.0.0.1"
KUBELET_HOSTNAME="--hostname-override=192.168.5.3"
KUBELET_API_SERVER="--api-servers=http://192.168.5.2:8080"
KUBELET_POD_INFRA_CONTAINER="--pod-infra-container-image=registry.access.redhat.com/rhel7/pod-infrastructure:latest"
KUBELET_ARGS=""
[root@Resources-s1 k8s]# cat node_start.sh
systemctl enable kubelet kube-proxy
systemctl start kubelet kube-proxy
网络配置
etcd配置内网信息
etcdctl -C 192.168.5.2:2379 set /playcrab-inc.com/network/config '{ "Network": "10.1.0.0/16" }'
node配置flanneld
[root@Resources-s1 k8s]# egrep -v '^#' /etc/sysconfig/flanneld | grep -v '^$'
FLANNEL_ETCD="http://192.168.5.2:2379"
FLANNEL_ETCD_KEY="/playcrab-inc.com/network"
[root@Resources-s1 k8s]# cat flanneld_start.sh
#systemctl enable flanenld
systemctl restart flanneld
[root@Resources-s1 k8s]# cat docker_start.sh
systemctl enable docker
systemctl restart docker
检查集群启动情况
[root@Control k8s]# kubectl get nodes
NAME STATUS AGE
192.168.5.3 Ready 28m
192.168.5.4 Ready 25m
======================================================
docker私有仓库建立
环境说明
我们选取192.168.5.2做私有仓库地址
yum install docker -y
1.启动docker仓库端口服务
docker run -d -p 5000:5000 --privileged=true -v /data/history:/data/registry registry
[root@Control docker_dw_images]# docker images
REPOSITORY TAG IMAGE ID CREATED SIZE
docker.io/registry latest c9bd19d022f6 6 weeks ago 33.27 MB
2.查看docker仓库端口服务
# curl -XGET http://192.168.5.2:5000/v2/_catalog
# curl -XGET http://192.168.5.2:5000/v2/image_name/tags/list
3.将自己的镜像加到docker仓库
1.1自己做基础镜像并加载到docker中
cd centos6-image && tar -c .|docker import - centos6-base
1.2 创建一个带ssh的基础镜像
mkdir centos6-ssh
cd centos6-ssh
vim Dockerfile
输入
FROM centos6-base
MAINTAINER wuqichao <wuqichao@playcrab.com>
RUN ssh-keygen -q -N "" -t dsa -f /etc/ssh/ssh_host_dsa_key
RUN ssh-keygen -q -N "" -t rsa -f /etc/ssh/ssh_host_rsa_key
RUN sed -ri 's/session required pam_loginuid.so/#session required pam_loginuid.so/g' /etc/pam.d/sshd
RUN mkdir -p /root/.ssh && chown root.root /root && chmod 700 /root/.ssh
EXPOSE 22
RUN echo 'root:xxx.com.cn' | chpasswd
ENV LANG en_US.UTF-8
ENV LC_ALL en_US.UTF-8
CMD /usr/sbin/sshd -D
保存退出
运行如下指令
docker build -t centos6-ssh .
不报错的话，就完成本地镜像
1.3 测试启动ssh的基础镜像
docker run -d -p 127.0.0.1:33333:22 centos6-ssh
1.4 登录ssh的基础镜像实例
ssh root@127.0.0.1 -p 33333
2.加载到自己的私有仓库
###docker pull docker.io/nginx
如果是本地建立docker不用执行上面的
docker tag centos6-ssh 192.168.5.2:5000/centos6-ssh
docker push 192.168.5.2:5000/centos6-ssh
3.检查是否成功
[root@Control k8s]# curl -XGET http://192.168.5.2:5000/v2/_catalog
{"repositories":["centos6-ssh"]}
k8s中使用docker私有仓库
环境设置
1.1.设置服务端
[root@Control k8s_yaml]# cat /etc/sysconfig/docker|grep 192.168.5.2
OPTIONS='--insecure-registry 192.168.5.2:5000 --log-driver=journald'
ADD_REGISTRY='--add-registry 192.168.5.2:5000'
1.2.设置客户端
[root@Control k8s]# cat /etc/default/docker
DOCKER_OPTS="--insecure-registry 192.168.5.2:5000"
1.3.去掉权限验证
在/etc/kubernetes/apiserver中
去除 KUBE_ADMISSION_CONTROL中的 SecurityContextDeny,ServiceAccount，
并重启kube-apiserver.service服务
#systemctl restart kube-apiserver.service
1.4.加上DNS服务不然后报错
KUBELET_ARGS="--cluster-dns=192.168.5.2 --cluster-domain=playcrab-inc.com"
配置YAML
2.0 常用指令
启动指令
kubectl create -f centos6-ssh/centos6-ssh.yaml
删除指令
kubectl delete -f centos6-ssh/centos6-ssh.yaml
查看指令
kubectl get pods
查看细节指令
kubectl describe pod centos6-ssh
2.1启动最简单的pod
2.1.1 yaml配置
[root@Control k8s_yaml]# cat centos6-ssh/centos6-ssh.yaml
apiVersion: v1
kind: Pod
metadata:
name: centos6-ssh
spec:
containers:
- name: centos6-ssh
image: centos6-ssh
2.1.2 查看指令
[root@Control k8s_yaml]# kubectl get pods
NAME READY STATUS RESTARTS AGE
centos6-ssh-mucsv 1/1 Running 0 10m
2.1.3 查看细节指令
kubectl describe pod centos6-ssh
[root@Control k8s_yaml]# kubectl describe pod centos6-ssh
Name: centos6-ssh
Namespace: default
Node: 192.168.5.3/192.168.5.3
Start Time: Wed, 30 Nov 2016 13:44:51 -0500
Labels: <none>
Status: Running
IP: 10.1.75.2
Controllers: <none>
Containers:
centos6-ssh:
Container ID: docker://7046491f05e3d549c198009f056b4e3e0508ad179712772bb296d0d08cc6ae29
Image: centos6-ssh
Image ID: docker://sha256:6525d364d418ae8dc854e6839dfaa653f2b6cd39c696a2f146bb918e69c20060
Port:
QoS Tier:
cpu: BestEffort
memory: BestEffort
State: Running
Started: Wed, 30 Nov 2016 13:44:52 -0500
Ready: True
Restart Count: 0
Environment Variables:
Conditions:
Type Status
Ready True
No volumes.
No events.
可以确认docker的实例跑在192.168.5.3这个NODE节点，分配到的集群内网IP为10.1.75.2
我们现在如果需要登录10.1.75.2要到192.168.5.3这个服务，ssh root@10.1.75.2,才可以登录
2.2启动多份的pod
2.2.1 yaml配置
我们定义了一个centos6-ssh pod复制器，复制份数为2，使用centos6-ssh镜像。
[root@Control k8s_yaml]# cat test/centos6-ssh-rc.yaml
apiVersion: v1
kind: ReplicationController
metadata:
name: centos6-ssh
spec:
replicas: 2
selector:
name: centos6-ssh
template:
metadata:
labels:
name: centos6-ssh
spec:
containers:
- name: centos6-ssh
image: centos6-ssh
ports:
- containerPort: 22
2.2.2 查看指令
[root@Control k8s_yaml]# kubectl get pods
NAME READY STATUS RESTARTS AGE
centos6-ssh-mucsv 1/1 Running 0 10m
centos6-ssh-yoghv 1/1 Running 0 10m
2.2.3 查看细节指令
[root@Control k8s_yaml]# kubectl describe pod centos6-ssh
Name: centos6-ssh-mucsv
Namespace: default
Node: 192.168.5.3/192.168.5.3
Start Time: Thu, 01 Dec 2016 11:04:24 -0500
Labels: name=centos6-ssh
Status: Running
IP: 10.1.75.2
Controllers: ReplicationController/centos6-ssh
Containers:
centos6-ssh:
Container ID: docker://ba9327de6f067b46ce348f409e9efa2b44a9064c4f1ea508cf7d92ff9c450541
Image: centos6-ssh
Image ID: docker://sha256:6525d364d418ae8dc854e6839dfaa653f2b6cd39c696a2f146bb918e69c20060
Port: 22/TCP
QoS Tier:
memory: BestEffort
cpu: BestEffort
State: Running
Started: Thu, 01 Dec 2016 11:04:25 -0500
Ready: True
Restart Count: 0
Environment Variables:
Conditions:
Type Status
Ready True
No volumes.
Events:
FirstSeen LastSeen Count From SubobjectPath Type Reason Message
--------- -------- ----- ---- ------------- -------- ------ -------
5h 5h 2 {kubelet 192.168.5.3} Warning MissingClusterDNS kubelet does not have ClusterDNS IP configured and cannot create Pod using "ClusterFirst" policy. Falling back to DNSDefault policy.
5h 5h 1 {kubelet 192.168.5.3} spec.containers{centos6-ssh} Normal Pulling pulling image "centos6-ssh"
5h 5h 1 {kubelet 192.168.5.3} spec.containers{centos6-ssh} Normal Pulled Successfully pulled image "centos6-ssh"
5h 5h 1 {kubelet 192.168.5.3} spec.containers{centos6-ssh} Normal Created Created container with docker id ba9327de6f06
5h 5h 1 {kubelet 192.168.5.3} spec.containers{centos6-ssh} Normal Started Started container with docker id ba9327de6f06
3m 3m 1 {default-scheduler } Normal Scheduled Successfully assigned centos6-ssh-mucsv to 192.168.5.3
Name: centos6-ssh-yoghv
Namespace: default
Node: 192.168.5.4/192.168.5.4
Start Time: Thu, 01 Dec 2016 11:04:37 -0500
Labels: name=centos6-ssh
Status: Running
IP: 10.1.68.2
Controllers: ReplicationController/centos6-ssh
Containers:
centos6-ssh:
Container ID: docker://221e4335774a8347a74fa7341f947954e3fb0eccff5fce7be427b532a4f5d31f
Image: centos6-ssh
Image ID: docker://sha256:6525d364d418ae8dc854e6839dfaa653f2b6cd39c696a2f146bb918e69c20060
Port: 22/TCP
QoS Tier:
cpu: BestEffort
memory: BestEffort
State: Running
Started: Thu, 01 Dec 2016 11:04:38 -0500
Ready: True
Restart Count: 0
Environment Variables:
Conditions:
Type Status
Ready False
No volumes.
Events:
FirstSeen LastSeen Count From SubobjectPath Type Reason Message
--------- -------- ----- ---- ------------- -------- ------ -------
5h 5h 2 {kubelet 192.168.5.4} Warning MissingClusterDNS kubelet does not have ClusterDNS IP configured and cannot create Pod using "ClusterFirst" policy. Falling back to DNSDefault policy.
5h 5h 1 {kubelet 192.168.5.4} spec.containers{centos6-ssh} Normal Pulling pulling image "centos6-ssh"
5h 5h 1 {kubelet 192.168.5.4} spec.containers{centos6-ssh} Normal Pulled Successfully pulled image "centos6-ssh"
5h 5h 1 {kubelet 192.168.5.4} spec.containers{centos6-ssh} Normal Created Created container with docker id 221e4335774a
5h 5h 1 {kubelet 192.168.5.4} spec.containers{centos6-ssh} Normal Started Started container with docker id 221e4335774a
3m 3m 1 {default-scheduler } Normal Scheduled Successfully assigned centos6-ssh-yoghv to 192.168.5.4
可以确认启动了两个实例
10.1.75.2实例在192.168.5.3上
10.1.68.2实例在192.168.5.4上
如果需要SSH连接上去操作还是需要登到各自的物理机上去才可操作
2.3启动内网可访问的services
2.3.1 yaml配置
[root@Control k8s_yaml]# cat test/centos6-ssh-clusterip.yaml
apiVersion: v1
kind: Service
metadata:
name: centos6-ssh-clusterip
spec:
ports:
- port: 2222
targetPort: 22
protocol: TCP
selector:
name: centos6-ssh
selector中的name必须和rc或者pod保持一致
2.3.2 查看
[root@Control k8s_yaml]# kubectl get service
NAME CLUSTER-IP EXTERNAL-IP PORT(S) AGE
centos6-ssh-clusterip 10.254.155.14 <none> 2222/TCP 3s
kubernetes 10.254.0.1 <none> 443/TCP 1d
[root@Control k8s_yaml]# kubectl describe service centos6-ssh-clusterip
Name: centos6-ssh-clusterip
Namespace: default
Labels: <none>
Selector: name=centos6-ssh
Type: ClusterIP
IP: 10.254.155.14
Port: <unset> 2222/TCP
Endpoints: 10.1.68.2:22,10.1.75.2:22
Session Affinity: None
No events.
上面可以确认centos6-ssh-clusterip已经启动，分配到的IP为10.254.155.14，开启2222端口
代理Endpoints: 10.1.68.2:22,10.1.75.2:22
2.3.3 登录测试
[root@Resources-s1 ~]# telnet 10.254.155.14 2222
Trying 10.254.155.14...
Connected to 10.254.155.14.
Escape character is '^]'.
SSH-2.0-OpenSSH_5.3
^Cxx
Connection closed by foreign host.
QA:
1.解决https问题
[root@Control k8s]# docker push 192.168.5.2:5000/centos6-ssh
The push refers to a repository [192.168.5.2:5000/centos6-ssh]
unable to ping registry endpoint https://192.168.5.2:5000/v0/
v2 ping attempt failed with error: Get https://192.168.5.2:5000/v2/: http: server gave HTTP response to HTTPS client
v1 ping attempt failed with error: Get https://192.168.5.2:5000/v1/_ping: http: server gave HTTP response to HTTPS client
要解决这个问题要在服务端和客户端改配置
服务端：
[root@Control k8s]# cat /etc/sysconfig/docker|grep 192.168.5.2
OPTIONS='--insecure-registry 192.168.5.2:5000 --log-driver=journald'
ADD_REGISTRY='--add-registry 192.168.5.2:5000'
客户端：
[root@Control k8s]# cat /etc/default/docker
DOCKER_OPTS="--insecure-registry 192.168.5.2:5000"
2.解决创建成功但是kubectl get pods 没有的问题
Error from server: error when creating "nginx.yaml": Pod "nginx" is forbidden: no API token found for service account default/default, retry after the token is automatically created and added to the service account
要解决这个问题如下：
创建pod:
# kubectl create -f nginx.yaml
此时有如下报错：
Error from server: error when creating "nginx.yaml": Pod "nginx" is forbidden: no API token found for service account default/default, retry after the token is automatically created and added to the service account
解决办法是编辑/etc/kubernetes/apiserver 去除 KUBE_ADMISSION_CONTROL中的SecurityContextDeny,ServiceAccount，并重启kube-apiserver.service服务：
#vim /etc/kubernetes/apiserver
KUBE_ADMISSION_CONTROL="--admission_control=NamespaceLifecycle,NamespaceExists,LimitRanger,ResourceQuota"
#systemctl restart kube-apiserver.service
之后重新创建pod:
# kubectl create -f nginx.yaml
pods/nginx
playcrab.com.cn
3. ClusterDNS 出问题，pod不成功
kubelet does not have ClusterDNS IP configured and cannot create Pod using "ClusterFirst" policy. Falling back to DNSDefault policy.
这样解决
KUBELET_ARGS="--cluster-dns=192.168.5.2 --cluster-domain=playcrab-inc.com"
参考链接
k8s相关：
http://www.cnblogs.com/openxxs/p/5072865.html
http://www.dockone.io/article/578
http://www.dockone.io/article/1616
http://webpaas.com/index.php/archives/111/
https://mos.meituan.com/library/37/how-to-setup-k8s-cluster-on-CentOS7/
https://www.caicloud.io/article_detail/573d85d2824168110000001d
http://kubernetes.io/docs/user-guide/quick-start/
http://blog.csdn.net/qq1010885678/article/details/49405435
http://www.cnblogs.com/CraryPrimitiveMan/p/4657835.html
http://www.tuicool.com/articles/y26nyar
https://segmentfault.com/q/1010000006127473
http://www.cnblogs.com/stonehat/p/5148455.html
http://valleylord.github.io/post/201603-kubernetes-roll/
kubernetes入门之kube-proxy实现原理
http://www.cnblogs.com/xuxinkun/p/5799986.html
http://blog.coocla.org/kubernetes-storage-volumes-rbd-docker.html
http://www.fangyunlin.com/?p=54
docker相关：
http://dockone.io/article/783
http://dockone.io/article/372
http://dockone.io/article/259
http://blog.liuts.com/post/242/
http://www.infoq.com/cn/articles/docker-network-and-pipework-open-source-explanation-practice
http://note.youdao.com/share/?id=8387b9e886c84f413a97d678c3d01869&type=note#/
http://www.pangxie.space/docker/157
http://www.pangxie.space/docker/176
http://dockone.io/article/1264
docker打镜像
http://my.oschina.net/feedao/blog
http://www.opstool.com/article/315
https://amao12580.github.io/post/2016/04/Nginx-with-docker-part-one/
删除docker私有仓库里的镜像
https://www.v2ex.com/t/266876
微服务化相关：
http://www.infoq.com/cn/articles/micro-service-architecture-evolution-of-daocloud
http://www.infoq.com/cn/articles/enterprise-core-systems-transformation-practice
http://dockone.io/article/394
http://www.infoq.com/cn/articles/the-back-end-business-systems-service-transformation
http://www.infoq.com/cn/articles/ultimate-discussion-of-micro-service-architecture
http://martinfowler.com/articles/microservices.html
kube-ui:
http://blog.csdn.net/zczzsq/article/details/50787810
交换机：
http://blog.csdn.net/wylfengyujiancheng/article/details/51762169
http://blog.csdn.net/wylfengyujiancheng/article/details/51762792
排错的用法
https://linfan1.gitbooks.io/kubernetes-chinese-docs/content/166-Applications.html
kube2sky
http://www.tuicool.com/articles/yeIJNjJ
手册
https://linfan1.gitbooks.io/kubernetes-chinese-docs/content/170-Services_FAQ.html
http://www.widuu.com/chinese_docker/examples/nodejs_web_app.html
https://docs.docker.com/registry/spec/api/#pagination
http://kubernetes.io/docs/user-guide/configmap/
http://tonybai.com/2016/11/17/nginx-config-hot-reloading-approach-for-kubernetes-cluster/
http://tonybai.com/2016/11/21/kuberize-ceph-rbd-api-service/
http://tonybai.com/2016/11/22/deploy-nginx-service-for-the-services-in-kubernetes-cluster/
http://tonybai.com/2016/11/16/how-to-pull-images-from-private-registry-on-kubernetes-cluster/
http://tonybai.com/2016/11/07/integrate-kubernetes-with-ceph-rbd/
http://tonybai.com/2016/10/23/install-dns-addon-for-k8s/
http://www.pangxie.space/docker/735
http://www.csdn.net/article/2015-06-12/2824937
http://www.cnblogs.com/puroc/p/5764330.html
http://www.pangxie.space/docker/643
http://www.webpaas.com/index.php/archives/115/
http://zhjwpku.com/docker/2016/08/30/k8s-deploy-a-3-nodes-cluster.html
http://zhjwpku.com/docker/2016/09/01/cluster-addon.html
http://blog.csdn.net/dream_broken/article/details/53115770
http://blog.csdn.net/dc_726/article/details/46475633
- 请尊重本人劳动成功，可以随意转载但保留以下信息
- 作者：岁月经年
- 原站：www.djhull.com
- 时间：2016年11月
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