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Kubernetes Linux Distribution Packages Builder

Quick Install (RedHat 7, CentOS 7, Debian 7, Ubuntu 14.x, 15.x)

  • Kubernetes master:
curl -sSL https://get.kismatic.com/kubernetes/master.sh | sudo sh
  • Kubernetes nodes:
curl -sSL https://get.kismatic.com/kubernetes/node.sh | sudo sh
  • Requirements:
    • Install etcd (on master or a separate etcd cluster)
    • Install docker (ubuntu/debian only)

Configuration and Manual Setup

System.d and RedHat 7 / CentOS 7 Configuration

The quick start scripts above will automatically add the kismatic repository as a source. Alternatively, you can manually add it with the command:

rpm -Uvh https://repos.kismatic.com/el/7/x86_64/kismatic-repo-el-7-1.x86_64.rpm

Manually Install Master: sudo yum install kubernetes-master Manually Install Nodes: sudo yum install kubernetes-node

Configure Kubernetes Master

Configure Kubernetes Master To configure services, edit configuration files in /etc/kubernetes/master or /etc/kubernetes/node To override services, copy /lib/systemd/system to /etc/systemd/system to override. This allows you to customize local services without worrying about losing changes as the result of a package upgrade.

Enable HTTPS (optional) By default, the apiserver is setup using insecure http and assumes a firewall will provide enough security. To enable https support, certs must be generated. A basic key has already been generated during install at /srv/kubernetes/server.key. To generate certs:

cd /srv/kubernetes
curl -O -L https://raw.githubusercontent.com/kubernetes/kubernetes/v1.1.2/cluster/saltbase/salt/generate-cert/make-ca-cert.sh
chmod +x make-ca-cert.sh

#Set to your master ip and already chosen cluster ip range
master_ip=127.0.0.1
SERVICE_CLUSTER_IP_RANGE=10.254.0.0/16

#Assumes cluster is named 'kubernetes' for DNS
./make-ca-cert.sh ${master_ip} IP:${master_ip},IP:${SERVICE_CLUSTER_IP_RANGE%.*}.1,DNS:kubernetes,DNS:kubernetes.default,DNS:kubernetes.default.svc,DNS:kubernetes.default.svc.cluster.local;

For AWS the external IP can be automatically discovered using:

./make-ca-cert.sh _use_aws_external_ip_ (other args...)

Update the kubernetes configuration files with the newly generated keys

#kube-apiserver
--secure-port=443 --tls-cert-file=/srv/kubernetes/server.cert --tls-private-key-file=/srv/kubernetes/server.key --client-ca-file=/srv/kubernetes/ca.crt

#kube-controller-manager
  --root-ca-file=/srv/kubernetes/ca.crt --service-account-private-key-file=/srv/kubernetes/server.key

Start services sudo systemctl start kube-apiserver sudo systemctl start kube-scheduler sudo systemctl start kube-controller-manager sudo systemctl start kubelet

test with curl -L http://<master ip>:8080/version

Configure Kubernetes Node

Set --master=<master ip> for a node in /etc/kubernetes/node/kube-proxy.conf and --master=<master ip> in /etc/kubernetes/node/kubelet.conf

sudo systemctl start kube-proxy sudo systemctl start kubelet

Check services are running systemctl list-units -t service --all

Init.d and Debian 7 (wheezy)/ Ubuntu 14.x (trusty) Configuration

Install docker on Ubuntu or Debian and etcd

Configure Kubernetes

To configure services, edit the file with the same name in /etc/default

Master

sudo service kube-apiserver start
sudo service kube-scheduler start
sudo service kube-controller-manager start
sudo service kubelet start

Configure Node Set the --master for a node in /etc/default/kube-proxy and --api-servers in /etc/default/kubelet

sudo service kube-proxy start
sudo service kubelet start

Development Build Notes

  • Make sure to have fpm installed along with rpmbuild
  • run K8S_VERSION=1.2.0 ./build_kubernetes.sh

Vagrant Smoke tests

  • CentOS
$ cd vagrant/centos; vagrant destroy && vagrant up
$ vagrant ssh master
$ sudo K8S_VERSION=1.2.0 /vagrant/test/master.sh
$ vagrant ssh node
$ sudo K8S_VERSION=1.2.0 /vagrant/test/node.sh
  • Ubuntu
# Trusty
$ cd vagrant/ubuntu/trusty; vagrant destroy && vagrant up
$ vagrant ssh master
$ sudo K8S_VERSION=1.2.0 /vagrant/test/master.sh
$ vagrant ssh node
$ sudo K8S_VERSION=1.2.0 /vagrant/test/node.sh

# Vivid
$ cd vagrant/ubuntu/vivid; vagrant destroy && vagrant up
$ vagrant ssh master
$ sudo K8S_VERSION=1.2.0 /vagrant/test/master.sh
$ vagrant ssh node
$ sudo K8S_VERSION=1.2.0 /vagrant/test/node.sh

Development Requirements

  • ruby

  • prerequisites:

    gem install fpm