Docker Practice (6) Deploy kubernetes on-centos7

Kubernetes Architecture

The overall architecture of the kubernetes is as follows:

Master is the main control node, which runs Apiserver,scheduler,controller-manager and other components. Minion is the equivalent of a working node, which runs Kubelet,proxy,cadvisor and the most important Docker components. Here's how to actually deploy this cluster management tool.

Environment

Yy1 10.193.6.35

Yy2 10.193.6.36

Yy1 as master,yy2 as minion.

# Cat/etc/centos-release

CentOS Linux release 7.0.1406 (Core)

Installing Kubernetes

# Curl HTTPS://copr.fedoraproject.org/coprs/eparis/kubernetes-epel-7/repo/epel-7/ Eparis-kubernetes-epel-7-epel-7.repo-o/etc/yum.repos.d/eparis-kubernetes-epel-7-epel-7.repo   YumInstall kubernetes-y

Configure Yy1

#Cat/etc/kubernetes/apiserver#### kubernetes System config## The following values is used to configure the Kubernetes-apiserver# # The address on the local server to listen. Kube_api_address="10.193.6.35"# The port is on the local server to listen. Kube_api_port="8080"# How the replication controller and schedulerFindThe apiserverkube_master="10.193.6.35:8080"# Comma seperated List of minionsminion_addresses="10.193.6.36"# Port Minions listen Onminion_port="10250" # Cat/etc/kubernetes/config#### kubernetes System config## The following values is used to configure various aspects of all# kubernetes SE Rvices, including## kubernetes-apiserver.service# kubernetes-controller-manager.service# kubernetes-kubelet.service# kubernetes-Proxy.service # Comma seperated List of nodesinchThe etcd clusterkube_etcd_servers="http://10.193.6.35:4001"# Logging to stderr means we get itinchThe systemd journalkube_logtostderr="true"# Journal message level,0is debugkube_log_level=0# Should this cluster is allowed to run privleged Docker Containerskube_allow_priv="true"

Start related services on yy1

You need to run the Etcd,kube-apiserver,kube-controller-manager,kube-scheduler 4 processes on master.

 for inch  Do     systemctl Restart $SERVICES    systemctl enable $SERVICES    systemctl status $SERVICESdone 

Configure Yy2

1#Cat/etc/kubernetes/Kubelet2 3 ###4 5 # kubernetes Kublet (Minion) config6 7  8 9# The Address forTheInfoserver to serve onTen  Oneminion_address="10.193.6.36" A  -   -  the# The Port forTheInfoserver to serve on -  -minion_port="10250" -  +   -  +# Leave this blank to use the actualhostname A  atMinion_hostname="10.193.6.36" -  -   -  -#Cat/etc/kubernetes/Config -  in ### -  to # kubernetes System config +  - # the  * # The following values is used to configure various aspects of all $ Panax Notoginseng # kubernetes Services, including -  the # +  A# kubernetes-Apiserver.service the  +# kubernetes-controller-Manager.service -  $# kubernetes-Kubelet.service $  -# kubernetes-Proxy.service -  the   - Wuyi# Comma seperated List of nodesinchThe etcd cluster the  -kube_etcd_servers="http://10.193.6.35:4001" Wu  -   About  $# Logging to stderr means we get itinchThe systemd Journal -  -Kube_logtostderr="true" -  A   +  the# Journal message level,0is debug -  $Kube_log_level=0 the  the   the  the # Should this cluster is allowed to run privleged Docker containers -  inkube_allow_priv="true"

Modify the configuration of the Yy2 Kubelet

There is no Docker.socket service on CentOS7, comment out the dependency on Docker.socket in Kubelet.

/usr/lib/systemd/system/kubelet.service

1 [Unit] 2 3 description=Kubernetes kubelet  4  5 #After =docker.socket cadvisor.service  6  7 after=cadvisor.service  8  9 #Requires =docker.socket Cadvisor.service requires=cadvisor.service

Start related services on the Yy2

You need to run Kube-proxy,kubelet and Docker on the minion.

 for inch  Do      systemctl Restart $SERVICES    systemctl enable $SERVICES    done

To create a pod description file

Create an Apache pod description file.

#Catapache.json{"ID":"Apache",  "desiredstate": {    "Manifest": {      "version":"v1beta1",      "ID":"apache-1",      "Containers": [{        "name":"Master",        "Image":"Fedora/apache",        "Ports": [{          "Containerport": the,          "Hostport": the        }]      }]    }  },  "Labels": {    "name":"Apache"  }}

Create pod

By submitting a task to apiserver through the client tool Kubecfg, a Minion deployment capacity is selected by scheduler.

[Email protected] ~]# kubecfg-c Apache.json Create podsI0925 .: +:26.768122 09313Request.go:292] Waiting forCompletion of/operations/1ID Image (s) Host Labels Status----------          ----------          ----------          ----------          ----------Apache Fedora/apache/name=Apache waiting [[email protected]~]# kubecfg list pods ID Image (s) Host Labels Status----------          ----------          ----------          ----------          ----------Apache Fedora/apache10.193.6.36/Name=apache Waiting

The Apache service automatically deploys to Docker on the machine yy2,yy2 automatically downloads the image and then launches the Apache service. Well, after a while, the Apache service will get up on the yy2.

[Email protected] ~]# kubecfg list pods  ID                  Image (s)            Host                Labels              Status----------          ----------          ----------          ----------          ----------Apache              Fedora/apache       10.193.  6.36/        name=apache         Running

You can try to access it,

Main references

Https://github.com/GoogleCloudPlatform/kubernetes/blob/master/docs/getting-started-guides/fedora/fedora_manual_config.md

YY Brother
Source: http://www.cnblogs.com/hustcat/
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Docker Practice (6) Deploy kubernetes on-centos7