Fixed docker0 address conflict

.gitignore

@@ -1,4 +1,2 @@
 .vagrant/
 log/
-user-data
-config.rb

Vagrantfile

@@ -46,7 +46,8 @@ end
 
 Vagrant.configure("2") do |config|
   # always use Vagrants insecure key
-  config.ssh.insert_key = false
+  config.ssh.insert_key = true
+  config.ssh.forward_agent = true
 
   config.vm.box = "coreos-%s" % $update_channel
   if $image_version != "current"
@@ -120,8 +121,9 @@ Vagrant.configure("2") do |config|
         vb.cpus = vm_cpus
       end
 
-      ip = "172.17.8.#{i+100}"
+      ip = "172.19.8.#{i+100}"
       config.vm.network :private_network, ip: ip
+      config.vm.network "public_network", bridge: "em1"
 
       # Uncomment below to enable NFS for sharing the host machine into the coreos-vagrant VM.
       #config.vm.synced_folder ".", "/home/core/share", id: "core", :nfs => true, :mount_options => ['nolock,vers=3,udp']

Vagrantfile.orig

@@ -0,0 +1,143 @@
+# -*- mode: ruby -*-
+# # vi: set ft=ruby :
+
+require 'fileutils'
+
+Vagrant.require_version ">= 1.6.0"
+
+CLOUD_CONFIG_PATH = File.join(File.dirname(__FILE__), "user-data")
+CONFIG = File.join(File.dirname(__FILE__), "config.rb")
+
+# Defaults for config options defined in CONFIG
+$num_instances = 1
+$instance_name_prefix = "core"
+$update_channel = "alpha"
+$image_version = "current"
+$enable_serial_logging = false
+$share_home = false
+$vm_gui = false
+$vm_memory = 1024
+$vm_cpus = 1
+$shared_folders = {}
+$forwarded_ports = {}
+
+# Attempt to apply the deprecated environment variable NUM_INSTANCES to
+# $num_instances while allowing config.rb to override it
+if ENV["NUM_INSTANCES"].to_i > 0 && ENV["NUM_INSTANCES"]
+  $num_instances = ENV["NUM_INSTANCES"].to_i
+end
+
+if File.exist?(CONFIG)
+  require CONFIG
+end
+
+# Use old vb_xxx config variables when set
+def vm_gui
+  $vb_gui.nil? ? $vm_gui : $vb_gui
+end
+
+def vm_memory
+  $vb_memory.nil? ? $vm_memory : $vb_memory
+end
+
+def vm_cpus
+  $vb_cpus.nil? ? $vm_cpus : $vb_cpus
+end
+
+Vagrant.configure("2") do |config|
+  # always use Vagrants insecure key
+  config.ssh.insert_key = false
+
+  config.vm.box = "coreos-%s" % $update_channel
+  if $image_version != "current"
+      config.vm.box_version = $image_version
+  end
+  config.vm.box_url = "http://%s.release.core-os.net/amd64-usr/%s/coreos_production_vagrant.json" % [$update_channel, $image_version]
+
+  ["vmware_fusion", "vmware_workstation"].each do |vmware|
+    config.vm.provider vmware do |v, override|
+      override.vm.box_url = "http://%s.release.core-os.net/amd64-usr/%s/coreos_production_vagrant_vmware_fusion.json" % [$update_channel, $image_version]
+    end
+  end
+
+  config.vm.provider :virtualbox do |v|
+    # On VirtualBox, we don't have guest additions or a functional vboxsf
+    # in CoreOS, so tell Vagrant that so it can be smarter.
+    v.check_guest_additions = false
+    v.functional_vboxsf     = false
+  end
+
+  # plugin conflict
+  if Vagrant.has_plugin?("vagrant-vbguest") then
+    config.vbguest.auto_update = false
+  end
+
+  (1..$num_instances).each do |i|
+    config.vm.define vm_name = "%s-%02d" % [$instance_name_prefix, i] do |config|
+      config.vm.hostname = vm_name
+
+      if $enable_serial_logging
+        logdir = File.join(File.dirname(__FILE__), "log")
+        FileUtils.mkdir_p(logdir)
+
+        serialFile = File.join(logdir, "%s-serial.txt" % vm_name)
+        FileUtils.touch(serialFile)
+
+        ["vmware_fusion", "vmware_workstation"].each do |vmware|
+          config.vm.provider vmware do |v, override|
+            v.vmx["serial0.present"] = "TRUE"
+            v.vmx["serial0.fileType"] = "file"
+            v.vmx["serial0.fileName"] = serialFile
+            v.vmx["serial0.tryNoRxLoss"] = "FALSE"
+          end
+        end
+
+        config.vm.provider :virtualbox do |vb, override|
+          vb.customize ["modifyvm", :id, "--uart1", "0x3F8", "4"]
+          vb.customize ["modifyvm", :id, "--uartmode1", serialFile]
+        end
+      end
+
+      if $expose_docker_tcp
+        config.vm.network "forwarded_port", guest: 2375, host: ($expose_docker_tcp + i - 1), auto_correct: true
+      end
+
+      $forwarded_ports.each do |guest, host|
+        config.vm.network "forwarded_port", guest: guest, host: host, auto_correct: true
+      end
+
+      ["vmware_fusion", "vmware_workstation"].each do |vmware|
+        config.vm.provider vmware do |v|
+          v.gui = vm_gui
+          v.vmx['memsize'] = vm_memory
+          v.vmx['numvcpus'] = vm_cpus
+        end
+      end
+
+      config.vm.provider :virtualbox do |vb|
+        vb.gui = vm_gui
+        vb.memory = vm_memory
+        vb.cpus = vm_cpus
+      end
+
+      ip = "172.17.8.#{i+100}"
+      config.vm.network :private_network, ip: ip
+
+      # Uncomment below to enable NFS for sharing the host machine into the coreos-vagrant VM.
+      #config.vm.synced_folder ".", "/home/core/share", id: "core", :nfs => true, :mount_options => ['nolock,vers=3,udp']
+      $shared_folders.each_with_index do |(host_folder, guest_folder), index|
+        config.vm.synced_folder host_folder.to_s, guest_folder.to_s, id: "core-share%02d" % index, nfs: true, mount_options: ['nolock,vers=3,udp']
+      end
+
+      if $share_home
+        config.vm.synced_folder ENV['HOME'], ENV['HOME'], id: "home", :nfs => true, :mount_options => ['nolock,vers=3,udp']
+      end
+
+      if File.exist?(CLOUD_CONFIG_PATH)
+        config.vm.provision :file, :source => "#{CLOUD_CONFIG_PATH}", :destination => "/tmp/vagrantfile-user-data"
+        config.vm.provision :shell, :inline => "mv /tmp/vagrantfile-user-data /var/lib/coreos-vagrant/", :privileged => true
+      end
+
+    end
+  end
+end

config.rb

@@ -0,0 +1,92 @@
+# Size of the CoreOS cluster created by Vagrant
+$num_instances=1
+
+# Used to fetch a new discovery token for a cluster of size $num_instances
+$new_discovery_url="https://discovery.etcd.io/new?size=#{$num_instances}"
+
+# To automatically replace the discovery token on 'vagrant up', uncomment
+# the lines below:
+#
+if File.exists?('user-data') && ARGV[0].eql?('up')
+  require 'open-uri'
+  require 'yaml'
+
+  token = open($new_discovery_url).read
+
+  data = YAML.load(IO.readlines('user-data')[1..-1].join)
+  if data['coreos'].key? 'etcd'
+    data['coreos']['etcd']['discovery'] = token
+  end
+  if data['coreos'].key? 'etcd2'
+    data['coreos']['etcd2']['discovery'] = token
+  end
+
+  # Fix for YAML.load() converting reboot-strategy from 'off' to `false`
+  if data['coreos']['update'].key? 'reboot-strategy'
+     if data['coreos']['update']['reboot-strategy'] == false
+          data['coreos']['update']['reboot-strategy'] = 'off'
+       end
+  end
+
+  yaml = YAML.dump(data)
+  File.open('user-data', 'w') { |file| file.write("#cloud-config\n\n#{yaml}") }
+end
+#
+
+#
+# coreos-vagrant is configured through a series of configuration
+# options (global ruby variables) which are detailed below. To modify
+# these options, first copy this file to "config.rb". Then simply
+# uncomment the necessary lines, leaving the $, and replace everything
+# after the equals sign..
+
+# Change basename of the VM
+# The default value is "core", which results in VMs named starting with
+# "core-01" through to "core-${num_instances}".
+#$instance_name_prefix="core"
+
+# Change the version of CoreOS to be installed
+# To deploy a specific version, simply set $image_version accordingly. 
+# For example, to deploy version 709.0.0, set $image_version="709.0.0".
+# The default value is "current", which points to the current version
+# of the selected channel
+#$image_version = "current"
+
+# Official CoreOS channel from which updates should be downloaded
+$update_channel='stable'
+#$update_channel='alpha'
+
+# Log the serial consoles of CoreOS VMs to log/
+# Enable by setting value to true, disable with false
+# WARNING: Serial logging is known to result in extremely high CPU usage with
+# VirtualBox, so should only be used in debugging situations
+#$enable_serial_logging=false
+
+# Enable port forwarding of Docker TCP socket
+# Set to the TCP port you want exposed on the *host* machine, default is 2375
+# If 2375 is used, Vagrant will auto-increment (e.g. in the case of $num_instances > 1)
+# You can then use the docker tool locally by setting the following env var:
+#   export DOCKER_HOST='tcp://127.0.0.1:2375'
+#$expose_docker_tcp=2375
+
+# Enable NFS sharing of your home directory ($HOME) to CoreOS
+# It will be mounted at the same path in the VM as on the host.
+# Example: /Users/foobar -> /Users/foobar
+#$share_home=false
+
+# Customize VMs
+$vm_gui = false
+$vm_memory = 512
+$vm_cpus = 1
+
+# Share additional folders to the CoreOS VMs
+# For example,
+# $shared_folders = {'/path/on/host' => '/path/on/guest', '/home/foo/app' => '/app'}
+# or, to map host folders to guest folders of the same name,
+# $shared_folders = Hash[*['/home/foo/app1', '/home/foo/app2'].map{|d| [d, d]}.flatten]
+#$shared_folders = {}
+#$shared_folders = {'/Users/kcyeu/Desktop/git/coreos-vagrant' => '/home/core/vagrant'}
+$shared_folders = {'/home/kcyeu/git/coreos-vagrant' => '/home/core/vagrant'}
+
+# Enable port forwarding from guest(s) to host machine, syntax is: { 80 => 8080 }, auto correction is enabled by default.
+#$forwarded_ports = {}

coreos-screenrc

@@ -0,0 +1,15 @@
+sessionname coreos
+hardstatus alwayslastline '%{= bw} %-Lw%{= .}%> %n%f %t*%{= .}%+Lw%< %-=%{g}(%{d}%H/%l%{g})'
+setenv PROMPT_COMMAND /usr/bin/true
+#setenv VAGRANT_COMMAND /usr/local/bin/vagrant
+screen -t bash bash
+
+screen -t core-01 bash
+stuff "vagrant ssh core-01"
+
+screen -t core-02 bash
+stuff "vagrant ssh core-02"
+
+screen -t core-03 bash
+stuff "vagrant ssh core-03"
+

demo-screenrc

@@ -0,0 +1,15 @@
+sessionname coreos
+hardstatus alwayslastline '%{= bw} %-Lw%{= .}%> %n%f %t*%{= .}%+Lw%< %-=%{g}(%{d}%H/%l%{g})'
+setenv PROMPT_COMMAND /usr/bin/true
+#setenv VAGRANT_COMMAND /usr/local/bin/vagrant
+screen -t bash bash
+
+screen -t core-01 bash
+stuff "ssh -A [email protected]"
+
+screen -t core-02 bash
+stuff "ssh -A [email protected]"
+
+screen -t core-03 bash
+stuff "ssh -A [email protected]"
+

docker/nginx-lb/Dockerfile

@@ -0,0 +1,27 @@
+FROM nginx:latest
+MAINTAINER Kuo-Cheng Yeu <[email protected]>
+
+ENV DEBIAN_FRONTEND noninteractive
+
+# Silently install basic packages
+RUN apt-get -qq update && apt-get -qqy install \ 
+    nginx \
+&& apt-get clean \
+&& rm -rf /var/lib/apt/lists/* \
+&& mkdir -p /usr/local/bin \
+&& mkdir -p /etc/confd/conf.d /etc/confd/templates \
+&& rm /etc/nginx/conf.d/default.conf
+
+# add confd
+ADD https://github.com/kelseyhightower/confd/releases/download/v0.10.0/confd-0.10.0-linux-amd64 /usr/local/bin/confd
+
+# add template, config, and script
+ADD assets/nginx.toml /etc/confd/conf.d/nginx.toml
+ADD assets/nginx.tmpl /etc/confd/templates/nginx.tmpl
+ADD assets/confd-watch /usr/local/bin/confd-watch
+
+RUN chmod +x /usr/local/bin/*
+
+CMD ["bash"]
+
+

docker/nginx-lb/assets/confd-watch

@@ -0,0 +1,29 @@
+#!/bin/bash
+
+set -eo pipefail
+
+# etcd2 use IANA-assigned port 2379 and 2380, but port 4001 and 7001 are
+# still available for compatibility
+export ETCD_PORT=${ETCD_PORT:-4001}
+export HOST_IP=${HOST_IP:-172.17.8.1}
+export ETCD=$HOST_IP:$ETCD_PORT
+
+echo "[nginx] booting container. ETCD: $ETCD."
+
+# Make initial configuration every 5 seconds until successful
+until confd -onetime -node $ETCD -config-file /etc/confd/conf.d/nginx.toml; do
+    echo "[nginx] waiting for confd to create initial nginx configuration."
+    sleep 5
+done
+
+# Polling `confd` process for changes every 10 seconds
+confd -interval 10 -node $ETCD -config-file /etc/confd/conf.d/nginx.toml &
+echo "[nginx] confd is now monitoring etcd for changes..."
+
+# Start the Nginx service using the generated config
+echo "[nginx] starting nginx service..."
+service nginx start
+
+# Follow the logs to allow the script to continue running
+tail -f /var/log/nginx/*.log
+

docker/nginx-lb/assets/nginx.tmpl

@@ -0,0 +1,23 @@
+log_format upstreamlog '[$time_local] $remote_addr passed to: $upstream_addr: $request Upstream Response Time: $upstream_response_time Request time: $request_time';
+
+upstream www_pool {
+{{ range getvs "/services/redis-workbench/*" }}
+    server {{ . }}:80;
+{{ end }}
+}
+
+server {
+    listen 80 default_server;
+    listen [::]:80 default_server ipv6only=on;
+
+    access_log /var/log/nginx/access.log upstreamlog;
+
+    location / {
+        proxy_pass http://www_pool;
+        proxy_redirect off;
+        proxy_set_header Host $host;
+        proxy_set_header X-Real-IP $remote_addr;
+        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
+    }
+}
+

docker/nginx-lb/assets/nginx.toml

@@ -0,0 +1,21 @@
+[template]
+
+# The name of the template that will be used to render the application's configuration file
+# Confd will look in `/etc/conf.d/templates` for these files by default
+src = "nginx.tmpl"
+
+# The location to place the rendered configuration file
+dest = "/etc/nginx/conf.d/app.conf"
+
+# The etcd keys or directory to watch.  This is where the information to fill in
+# the template will come from.
+keys = [ "/services/redis-workbench" ]
+
+# File ownership and mode information
+owner = "root"
+mode = "0644"
+
+# These are the commands that will be used to check whether the rendered config is
+# valid and to reload the actual service once the new config is in place
+check_cmd = "/usr/sbin/nginx -t"
+reload_cmd = "/usr/sbin/service nginx reload"