Setting up Kubernetes cluster - Revision history

Kir: much more info added

2015-09-14T21:58:27Z

much more info added

Kir: /* Set nodes (minions) */ some more steps

2015-09-14T19:20:15Z

‎Set nodes (minions): some more steps

Kir: /* Master installation */ formatting fixes

2015-09-13T22:23:50Z

‎Master installation: formatting fixes

Kir: prevent making links where not necessary

2015-09-13T05:21:12Z

prevent making links where not necessary

Kir: created (not finished)

2015-09-13T05:20:14Z

created (not finished)

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This article describes a way to deploy a Kubernetes cluster on a few CentOS 7 machines.

{{Stub}}

== Prerequisites ==

Every system should have:
* CentOS 7 minimal installed
* firewalld stopped
: <code>systemctl stop firewalld; systemctl disable firewalld</code>
* ntpd installed and running:
: <code>yum -y install ntpd && systemctl start ntpd && systemctl enable ntpd</code>

== Master installation ==

To install a master node, you need to do the following:

1. Install etcd and kubernetes-master:

yum -y install etcd kubernetes-master

2. Configure etcd to listen to all IPs.

Make sure <code>/etc/etcd/etcd.conf</code> contains this line:

ETCD_LISTEN_CLIENT_URLS="http://0.0.0.0:2379"

3. Configure Kubernetes API server.

Make sure <code>/etc/kubernetes/apiserver</code> contains this:

4. Start master node services:

for S in etcd kube-apiserver kube-controller-manager kube-scheduler; do
systemctl restart $S
systemctl enable $S
done

== Set nodes (minions) ==

1. Install flannel and kubernetes-node:

yum -y install flannel kubernetes-node

== See also ==

* [https://github.com/coreos/etcd/blob/master/Documentation/configuration.md etcd configuration]

@@ Line 1: / Line 1: @@
-This article describes a way to deploy a Kubernetes cluster on a few CentOS 7 machines.
+This article describes a way to deploy a Kubernetes cluster on a few CentOS 7 machines, using Docker with ploop graphdriver.
 {{Stub}}
@@ Line 8: / Line 8: @@
 * CentOS 7 minimal installed
 * firewalld stopped
-: <code>systemctl stop firewalld; systemctl disable firewalld</code>
+* ntpd installed and running
-* ntpd installed and running:
-: <code>yum -y install ntpd && systemctl start ntpd && systemctl enable ntpd</code>
+For Docker to work with ploop (on the nodes), you also need:
 == Master installation ==
@@ Line 30: / Line 54: @@
 Make sure <code>/etc/kubernetes/apiserver</code> contains this:
-. Start master node services:
+=== Start master node services ===
   for S in etcd kube-apiserver kube-controller-manager kube-scheduler; do
@@ Line 39: / Line 63: @@
 == Set nodes (minions) ==
-. Install vzkernel:
+=== Set the node hostname ===
   rpm -ihv https://download.openvz.org/virtuozzo/factory/x86_64/os/Packages/v/vzkernel-3.10.0-229.7.2.vz7.6.9.x86_64.rpm
-. Enable docker-ploop repo:
+Or, use the latest vzkernel from https://download.openvz.org/virtuozzo/factory/x86_64/os/Packages/v/
   cd /etc/yum.repos.d/
   wget https://copr.fedoraproject.org/coprs/kir/docker-ploop/repo/epel-7/kir-docker-ploop-epel-7.repo
@@ Line 49: / Line 95: @@
   yum install ploop docker
-. Set ploop driver to be default for docker.
+Then, set ploop driver to be default for docker. Make sure <code>/etc/sysconfig/docker-storage</code> contains:
   DOCKER_STORAGE_OPTIONS="-s ploop"
-. Install flannel and kubernetes-node:
+=== Install flannel and kubernetes-node ===
   yum -y install flannel kubernetes-node
 == See also ==
 * [https://github.com/coreos/etcd/blob/master/Documentation/configuration.md etcd configuration]

@@ Line 16: / Line 16: @@
 To install a master node, you need to do the following:
-. Install etcd and kubernetes-master:
+=== Install etcd and kubernetes-master ===
   yum -y install etcd kubernetes-master
-. Configure etcd to listen to all IPs.
+=== Configure etcd ===
 Make sure <code>/etc/etcd/etcd.conf</code> contains this line:
@@ Line 26: / Line 26: @@
   <nowiki>ETCD_LISTEN_CLIENT_URLS="http://0.0.0.0:2379"</nowiki>
-. Configure Kubernetes API server.
+=== Configure Kubernetes API server ===
 Make sure <code>/etc/kubernetes/apiserver</code> contains this:
 . Start master node services:
   for S in etcd kube-apiserver kube-controller-manager kube-scheduler; do
-    systemctl restart $S
+   systemctl restart $S
-    systemctl enable $S
+   systemctl enable $S
-done
+ done
 == Set nodes (minions) ==