VTWO-14496 : continue configuring machine

.gitignore

@@ -1 +1,4 @@
 .vagrant
+kubernetes/
+etcd*/
+cluster.config

README.md

@@ -1,17 +1,62 @@
 # Introduction
 
 This repository is intended for demo-ing the manual install of kubernetes's components on both master and worker nodes.
-It should be able to get you to a working single master kubernetes setup on a set of vagrant boxes
+
+It should be able to get you to a working single master (insecure) kubernetes setup on a set of VMs
+
+```plantuml
+@startuml
+database etcd [
+  etcd 
+]
+
+package "master-node" {
+  [api-server] -> etcd
+
+  [kubelet] --> [api-server] : watch
+  [kubelet] --> [container-runtime] : run & watch
+  
+  [scheduler] --> [api-server] : watch
+  [scheduler] --> [api-server] : apply
+
+  [controller-manager] --> [api-server] : watch
+  [controller-manager] --> [api-server] : apply
+}
+
+package "worker-node-1" {
+  [kubelet ] --> [api-server] : watch
+  [kubelet ] --> [container-runtime ] : run & watch
+
+}
+
+package "worker-node-2" {
+  [kubelet  ] --> [api-server] : watch
+  [kubelet  ] --> [container-runtime  ] : run & watch
+}
+
+@enduml
+```
+
 
 # prerequisites
 - vagrant
 - the scp vagrant plugin : `vagrant plugin install vagrant-scp`
 - [the GNU parallel CLI](https://www.gnu.org/software/parallel/)
+- [jq](https://stedolan.github.io/jq/)
 
 # setup
-- start the vms
+- run `vagrant up` to start the vms. This will create a master node and 2 worker nodes on your host's network
+
+- run `./scripts/show_cluster_config | tee cluster.config`
+
+- copy the cluster configuration to the nodes:
 ```sh
-vagrant up
+./scripts/copy_file_to_nodes cluster.config
+```
+
+- install the jq CLI on the nodes so they can read the config
+```sh
+./scripts/run_script_on_nodes install_jq_cli
 ```
 
 - setup a container runtime
@@ -21,5 +66,19 @@ vagrant up
 
 - download kubernetes
 ```sh
-./scripts/run_script_on_nodes download_node_binaries
+./scripts/download_kubernetes_binaries $(cat cluster.config | jq -r ".kubernetes_version") ./kubernetes
+```
+- download etcd
+```sh
+./scripts/download_etcd_binaries $(cat cluster.config | jq -r ".etcd3_version") ./etcd3
+```
+
+- copy kubelet & kube-proxy on the worker nodes
+```sh
+./scripts/copy_file_to_nodes ./kubernetes/workers worker
+```
+
+- copy kubelet, proxy, apiserver, scheduler and native controllers binaries to the master nodes
+```sh
+./scripts/copy_file_to_nodes ./etcd3 master
 ```

Vagrantfile

@@ -8,6 +8,8 @@ Vagrant.configure("2") do |config|
   config.vm.box = "debian/stretch64"
   config.vm.box_version = "= 9.9.1"
   
+  config.vm.network "private_network", type: "dhcp"
+
   # greet from every configured VM, revealing its hostname
   config.vm.provision "shell", inline: "echo Hello from \$HOSTNAME"
 

scripts/copy_file_to_nodes

@@ -0,0 +1,17 @@
+#!/usr/bin/env bash
+SCRIPTS_DIR=$(dirname $0)
+FILE_TO_COPY=$(realpath "$1")
+NODE_NAMES="$($SCRIPTS_DIR/node_names $2)"
+
+echo "will copy $FILE_TO_COPY to nodes $(echo $NODE_NAMES | xargs)"
+
+echo ""
+echo ""
+echo ""
+echo ""
+
+read -n 1 -s -r -p "Press any key to continue..."
+echo ""
+echo ""
+
+parallel vagrant scp $FILE_TO_COPY {}:~/ ::: $NODE_NAMES

scripts/download_etcd_binaries

@@ -0,0 +1,18 @@
+#!/usr/bin/env bash
+
+ETCD3_RELEASE_VERSION=$1
+OUTPUT_DIR=$(realpath "$2")
+
+tmp_dir=$(mktemp -d)
+
+pushd "$tmp_dir" &> /dev/null
+
+curl -sL "https://github.com/etcd-io/etcd/releases/download/$ETCD3_RELEASE_VERSION/etcd-$ETCD3_RELEASE_VERSION-linux-arm64.tar.gz" | tar -zxf -
+
+mkdir -p $OUTPUT_DIR
+mv etcd-$ETCD3_RELEASE_VERSION-linux-arm64/etcd $OUTPUT_DIR/
+mv etcd-$ETCD3_RELEASE_VERSION-linux-arm64/etcdctl $OUTPUT_DIR/
+
+popd &> /dev/null
+
+rm -rf $tmp_dir

scripts/download_kubernetes_binaries

@@ -0,0 +1,30 @@
+#!/usr/bin/env bash
+
+# v1.15.0
+K8S_RELEASE_VERSION=$1
+OUTPUT_DIR=$(realpath "$2")
+
+tmp_dir=$(mktemp -d)
+
+pushd "$tmp_dir" &> /dev/null
+
+container_id=$(docker create gcr.io/google-containers/hyperkube:$K8S_RELEASE_VERSION)
+docker cp $container_id:/hyperkube ./hyperkube
+docker rm -f $container_id &> /dev/null
+
+mkdir -p $OUTPUT_DIR/workers
+cp hyperkube $OUTPUT_DIR/workers/kubelet
+cp hyperkube $OUTPUT_DIR/workers/proxy
+cp hyperkube $OUTPUT_DIR/workers/kubectl
+
+mkdir -p $OUTPUT_DIR/masters
+cp hyperkube $OUTPUT_DIR/masters/kubelet
+cp hyperkube $OUTPUT_DIR/masters/proxy
+cp hyperkube $OUTPUT_DIR/masters/kubectl
+cp hyperkube $OUTPUT_DIR/masters/scheduler
+cp hyperkube $OUTPUT_DIR/masters/controller-manager
+cp hyperkube $OUTPUT_DIR/masters/cloud-controller-manager
+cp hyperkube $OUTPUT_DIR/masters/apiserver
+popd &> /dev/null
+
+rm -rf $tmp_dir

scripts/download_node_binaries

@@ -1,2 +0,0 @@
-#!/usr/bin/env bash
-curl -sL https://github.com/kubernetes/kubernetes/releases/download/v1.15.0/kubernetes.tar.gz | tar zxvf -

scripts/install_container_runtime

@@ -14,3 +14,11 @@ curl -fsSL https://download.docker.com/linux/debian/gpg | sudo apt-key add -
 sudo add-apt-repository -y "deb [arch=amd64] https://download.docker.com/linux/debian $(lsb_release -cs) stable"
 
 sudo apt-get install -y --allow-unauthenticated docker-ce docker-ce-cli containerd.io
+
+sudo systemctl enable docker
+
+sleep 5
+
+sudo systemctl start docker
+
+sudo usermod -aG docker $USER

scripts/install_jq_cli

@@ -0,0 +1,5 @@
+#!/usr/bin/env bash
+
+sudo apt-get update -y 
+
+sudo apt-get install -y jq

scripts/node_ip_addresses

@@ -0,0 +1,9 @@
+#!/usr/bin/env bash
+SCRIPTS_DIR=$(dirname $0)
+
+for vagrant_box in $($SCRIPTS_DIR/node_names $1)
+do
+    ip_address=$(vagrant ssh $vagrant_box -c "hostname -I | cut -d' ' -f2" 2>/dev/null)
+    echo "$vagrant_box $ip_address"
+done
+

scripts/run_script_on_nodes

@@ -1,7 +1,8 @@
 #!/usr/bin/env bash
 SCRIPTS_DIR=$(dirname $0)
 SCRIPT_NAME=$1
-NODE_NAMES="$($SCRIPTS_DIR/node_names $2)"
+NODE_NAMES_FILTER=$2
+NODE_NAMES="$($SCRIPTS_DIR/node_names $NODE_NAMES_FILTER)"
 
 cat $SCRIPTS_DIR/$SCRIPT_NAME
 
@@ -15,8 +16,10 @@ echo ""
 echo ""
 
 # copy script over
-chmod u+x "$SCRIPTS_DIR/$SCRIPT_NAME"
+pushd $SCRIPTS_DIR &> /dev/null
-parallel vagrant scp "$SCRIPTS_DIR/$SCRIPT_NAME" "{}:~/" ::: $NODE_NAMES
+chmod u+x "$SCRIPT_NAME"
+yes | ./copy_file_to_nodes "$SCRIPT_NAME" "$NODE_NAMES_FILTER" &> /dev/null
+popd &> /dev/null
 
 # remotely run the script
 parallel vagrant ssh {} -c "\~/$SCRIPT_NAME" ::: $NODE_NAMES

scripts/show_cluster_config

@@ -0,0 +1,17 @@
+#!/usr/bin/env bash
+
+KTHW_KUBERNETES_VERSION=v1.15.0
+KTHW_ETCD3_VERSION=v3.3.13
+
+cat <<EOF
+{
+    "kubernetes_version": "$KTHW_KUBERNETES_VERSION",
+
+    "etcd3_version": "$KTHW_ETCD3_VERSION",
+    
+    "master": null,
+
+    "workers": [
+    ]
+}
+EOF