add an example of Rancher Server deployment

rancher-server-deployment/README.md

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+# Rancher Server Deployment Example
+
+This example demonstrates how to run a Rancher Server in HA mode on two Vagrant nodes including load balancer and database setup.
+
+To run the example make sure you have the following components installed on your machine:
+* VirtualBox
+* Vagrant
+* Oracle Java 8 (JDK or JRE)
+* Infrastructor
+
+### Step 1: run virtual nodes
+Run virtual node using vagrant CLI from the directory where the Vagrantfile is located:
+```
+vagrant up
+```
+
+### Step 2: run the provisioning script:
+From the same directory execute provisioning script with infrastructor CLI:
+```
+infrastructor run -f provision.groovy
+```
+you will be asked for a MySQL password during execution.
+
+### Step 3: check the result
+Open a web browser and  go to http://192.168.55.10. You should see a rancher server welcome page.
+

rancher-server-deployment/Vagrantfile

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+# -*- mode: ruby -*-
+# vi: set ft=ruby :
+
+Vagrant.configure("2") do |config|
+  config.vm.box = "ubuntu/xenial64"
+
+  config.vm.provider "virtualbox" do |v|
+    v.customize ["modifyvm", :id, "--uartmode1", "disconnected"]
+  end
+
+  config.vm.define "haproxy" do |node|
+      node.vm.network "private_network", ip: "192.168.55.10"
+      node.vm.provider :virtualbox do |vb|
+        vb.memory = 512
+        vb.cpus = 1
+      end
+  end
+
+  config.vm.define "rancher-1" do |node|
+      node.vm.network "private_network", ip: "192.168.55.11"
+      node.vm.provider :virtualbox do |vb|
+        vb.memory = 2048
+        vb.cpus = 2
+      end
+  end
+
+  config.vm.define "rancher-2" do |node|
+      node.vm.network "private_network", ip: "192.168.55.12"
+      node.vm.provider :virtualbox do |vb|
+        vb.memory = 2048
+        vb.cpus = 2
+      end
+  end
+
+  config.vm.define "mysql" do |node|
+      node.vm.network "private_network", ip: "192.168.55.13"
+      node.vm.provider :virtualbox do |vb|
+        vb.memory = 2048
+        vb.cpus = 2
+      end
+  end
+end

rancher-server-deployment/provision.groovy

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+inlineInventory {
+  node id: 'haproxy',   host: '192.168.55.10', username: 'ubuntu', keyfile: keypath('haproxy'),   tags: [role: 'haproxy']
+  node id: 'rancher-1', host: '192.168.55.11', username: 'ubuntu', keyfile: keypath('rancher-1'), tags: [role: 'rancher']
+  node id: 'rancher-2', host: '192.168.55.12', username: 'ubuntu', keyfile: keypath('rancher-2'), tags: [role: 'rancher']
+  node id: 'mysql',     host: '192.168.55.13', username: 'ubuntu', keyfile: keypath('mysql'),     tags: [role: 'mysql']
+}.provision {
+
+  task name: 'install docker on all hosts', parallel: 4, actions: {
+    shell "sudo apt update"
+    shell "sudo curl -Ssl https://get.docker.com | sh"
+    shell "sudo usermod -aG docker ubuntu"
+  }
+
+  def MYSQL_PASSWORD = input message: "Enter MySQL password for rancher user: ", secret: true
+
+  task name: 'run a mysql server', filter: {'role:mysql'}, actions: {
+    info "launching a mysql instance"
+    shell "docker rm -f rancher-storage || true"
+    shell ("docker run -p 3306:3306 " + \
+           "-d -e MYSQL_RANDOM_ROOT_PASSWORD=yes " + \
+           "-e MYSQL_PASSWORD=$MYSQL_PASSWORD " + \
+           "-e MYSQL_USER=rancher " + \
+           "-e MYSQL_DATABASE=rancher " + \
+           "--name rancher-storage mysql:5.6.37")
+
+    info "wating for mysql instance is up and running"
+    retry count: 10, delay: 2000, actions: {
+      assert canConnectTo {
+        port = 3306
+        host = node.host
+      }
+    }
+  }
+
+  task name: 'run a couple of rancher servers', parallel: 2, filter: {'role:rancher'}, actions: {
+    shell "docker rm -f rancher-server || true"
+    shell ("docker run -d -p 80:8080 " + \
+           "-p 9345:9345 --restart=always " + \
+           "--name=rancher-server rancher/server:v1.6.4 " + \
+           "--advertise-address ${node.host} " + \
+           "--advertise-http-port 80 " + \
+           "--db-host 192.168.55.13 " + \
+           "--db-port 3306 " + \
+           "--db-pass $MYSQL_PASSWORD " + \
+           "--db-user rancher " + \
+           "--db-name rancher")
+  }
+
+  task name: 'run an haproxy load balancer', filter: {'role:haproxy'}, actions: {
+    info "uploading haproxy configuration"
+    directory sudo: true, target: '/etc/haproxy', mode: 600
+    template(mode: 600, sudo: true) {
+      source = 'templates/haproxy.cfg'
+      target = '/etc/haproxy/haproxy.cfg'
+      bindings = [
+        port: 80,
+        servers: [
+          [name: 'rancher1', host: '192.168.55.11', port: 80],
+          [name: 'rancher2', host: '192.168.55.12', port: 80]
+        ]
+      ]
+    }
+
+    info "launching haproxy instance"
+    shell "docker run -d -v /etc/haproxy:/usr/local/etc/haproxy:ro -p 80:80 --name haproxy haproxy:1.7"
+
+    info "waiting for haproxy is up and running"
+    retry count: 10, delay: 5000, actions: {
+      def response = httpGet url: "http://$node.host/ping"
+      assert response.code == 200
+    }
+  }
+}
+
+def keypath(def machine) { ".vagrant/machines/$machine/virtualbox/private_key" }

rancher-server-deployment/templates/haproxy.cfg

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+global
+  daemon
+  maxconn 256
+
+defaults
+  mode http
+  timeout connect 5000ms
+  timeout client 50000ms
+  timeout server 50000ms
+
+listen http-in
+  bind *:$port
+<% servers.each { out.println "  server $it.name $it.host:$it.port maxconn 32" } %>