Fix for kubernetes 1.11.3

README.md

@@ -3,11 +3,12 @@ CKA Lab
 
 Laboratory environment for "Certified Kubernetes Administrator (CKA)" Linux Academy course
 
+kubernetes v1.11 (to use a different version look at https://github.com/pbacterio/cka_lab/tags)
 
 Build cluster
 -------------
 
-Execute: `./build_cluster.sh` 
+Execute: `./build_cluster.sh`
 
 This script creates three virtual machines:
 

Vagrantfile

@@ -4,12 +4,12 @@
 Vagrant.configure("2") do |config|
   config.vm.box = "centos/7"
   config.vm.provision "shell", path: "provision/docker_install.sh"
+  config.vm.provision "shell", path: "provision/kubernetes_install.sh"
 
   config.vm.define "master" do |master|
     master.vm.hostname = "master"
     master.vm.network "private_network", ip: "192.168.33.20"
-    master.vm.provision "shell", path: "provision/kubernetes_install.sh", env: {"NODE_IP" => "192.168.33.20"}
-    master.vm.provision "shell", path: "provision/master_init.sh", env: {"NODE_IP" => "192.168.33.20"}, privileged: false
+    master.vm.provision "shell", path: "provision/master_init.sh", privileged: false
     for p in [:virtualbox, :libvirt] do
       master.vm.provider p do |provider|
         provider.memory = 2048
@@ -20,7 +20,6 @@ Vagrant.configure("2") do |config|
   (1..2).each do |i|
     config.vm.define "node#{i}" do |node|
       node.vm.hostname = "node#{i}"
-      node.vm.provision "shell", path: "provision/kubernetes_install.sh", env: {"NODE_IP" => "192.168.33.2#{i}"}
       node.vm.network "private_network", ip: "192.168.33.2#{i}"
       for p in [:virtualbox, :libvirt] do
         node.vm.provider p do |provider|

build_cluster.sh

@@ -3,7 +3,7 @@ set -x
 
 vagrant up
 
-join_cmd=$(vagrant ssh master -c "sudo kubeadm token create --print-join-command")
+join_cmd=$(vagrant ssh master -c 'sudo kubeadm token create --print-join-command')
 
 vagrant ssh node1 -c "sudo ${join_cmd}"
 vagrant ssh node2 -c "sudo ${join_cmd}"

provision/kubernetes_install.sh

@@ -16,14 +16,20 @@ sed -i '/swap/d' /etc/fstab
 setenforce 0
 sed -i 's/^SELINUX=.*/SELINUX=permissive/' /etc/selinux/config
 
-yum install -y kubelet kubeadm kubectl
+yum install -y kubelet-1.11.3 kubeadm-1.11.3 kubectl-1.11.3 ipvsadm
+
+modprobe ip_vs
+modprobe ip_vs_rr
+modprobe ip_vs_sh
+modprobe ip_vs_wrr
 
 cat <<EOF >  /etc/sysctl.d/k8s.conf
 net.bridge.bridge-nf-call-ip6tables = 1
 net.bridge.bridge-nf-call-iptables = 1
 EOF
 sysctl --system
 
+NODE_IP=$(ip -br -4 address show eth1 | awk '{split($3,ip,"/"); print ip[1]}')
 cat << EOF > /etc/systemd/system/kubelet.service.d/50-customs.conf
 [Service]
 Environment="KUBELET_CGROUP_ARGS=--cgroup-driver=cgroupfs"

provision/master_init.sh

@@ -1,6 +1,7 @@
 #!/bin/bash
 set -x
 
+NODE_IP=$(ip -br -4 address show eth1 | awk '{split($3,ip,"/"); print ip[1]}')
 sudo kubeadm init --pod-network-cidr=10.244.0.0/16 --apiserver-advertise-address=$NODE_IP
 
 mkdir -p $HOME/.kube