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kube's Introduction

kube

由于不能从google container上直接pull镜像,所以这里通过docker hub的Automated Builds功能从项目的dockerfile中Build到docker的官方服务器上,然后再从它们上面拉取.

kube 1.5.2需要的镜像:

gcr.io/google_containers/kube-proxy-amd64                v1.5.2
gcr.io/google_containers/kube-discovery-amd64            1.0
gcr.io/google_containers/kubedns-amd64                   1.9
gcr.io/google_containers/kube-scheduler-amd64            v1.5.2
gcr.io/google_containers/kube-controller-manager-amd64   v1.5.2
gcr.io/google_containers/kube-apiserver-amd64            v1.5.2
gcr.io/google_containers/etcd-amd64                      3.0.14-kubeadm
gcr.io/google_containers/kube-dnsmasq-amd64              1.4
gcr.io/google_containers/dnsmasq-metrics-amd64           1.0
gcr.io/google_containers/exechealthz-amd64               1.2
gcr.io/google_containers/pause-amd64                     3.0
kubernetes/heapster                                      canary
gcr.io/google_containers/kubernetes-dashboard-amd64      v1.5.1

docker hub上设置

由于docker hub不能后期更改一个image的tag,所以每次更新kubernetes时,都在build settings中,手动增加一个版本对应文件

更改tag

images=(kube-proxy-amd64:v1.5.2 kube-discovery-amd64:1.0 kubedns-amd64:1.9 kube-scheduler-amd64:v1.5.2 kube-controller-manager-amd64:v1.5.2 kube-apiserver-amd64:v1.5.2 etcd-amd64:3.0.14-kubeadm kube-dnsmasq-amd64:1.4 exechealthz-amd64:1.2 pause-amd64:3.0 dnsmasq-metrics-amd64:1.0)
for imageName in ${images[@]} ; do
  docker pull  sailsxu/$imageName
  docker tag  sailsxu/$imageName gcr.io/google_containers/$imageName
done
# 监控
images=(heapster:canary heapster_grafana:v2.6.0 heapster_influxdb:v0.6)
for imageName in ${images[@]} ; do
  docker pull  sailsxu/$imageName
  docker tag  sailsxu/$imageName kubernetes/$imageName
done
# 日志
images=(elasticsearch:v2.4.1-1 fluentd-elasticsearch:1.22 kibana:v4.6.1-1)
for imageName in ${images[@]} ; do
  docker pull  sailsxu/$imageName
  docker tag  sailsxu/$imageName gcr.io/google_containers/$imageName
done

通过kubeadm安装

kubeadm init --use-kubernetes-version v1.5.2

#或者(可以通过netstat -rn来看是否需要重新设置 --pod-network-cidr,默认的是10.244.0.0/16)
#kubeadm init --use-kubernetes-version v1.5.2 --pod-network-cidr=172.16.0.0/16
#当时加入某个结点时
#kubeadm join --token=xxx.xxx ip

让kubernetes可以在master上启动业务pods

kubectl taint nodes --all dedicated-

当通过kubeadm安装后,还需要安装网络

由于 pod 可能运行在不同的机器上,所以为了能让 pod 互相通信,就需要安装 pod 网络插件。weave net或者flannel,如果启动master时配置了pod-network-cidr,这里也要配置:

kubectl apply -f https://git.io/weave-kube

因为之前的 kube-dns addon 是依赖 pod 网络的,所以在没有部署 pod 网络之前,kube-dns 都会报错,因此只需要检查 kube-dns 是否成功就知道 pod 网络有没有成功了。

kubectl get pods --all-namespaces

如果docker hub也不能访问

如果docker hub也不能访问,那么可以通过阿里云或者daocloud的加速,它会在docker的配置--registry-mirro中加一个镜像服务器,但是通过它还是不能访问google container的镜像,所以还是需要上面在docker hub中配置

安装kubeadm

由于kubeadm安装时也要从google的源上下载,这里配置一个离线的包kubeadm

# ubuntu
apt install -y -f gdebi
apt install -y -f socat
dpkg -i kubeadm.deb kubectl.deb kubelet.deb kube-cni.deb

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