Add Vagrantfile for fast testing with Docker 1.12

Vagrantfile

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+# This Vagrantfile is used for testing with docker version 1.12 and CentOS 7.5
+# as a close enough replacement for development to RedHat 7.5 without
+# additional steps for requesting licenses every time machine is destroyed.
+# After `vagrant up` end you'll have ready to use Docker engine and
+# docker-compose.
+# Directory `/vagrant` is mounted to local folder so you will find all source
+# code there.
+#
+# Simple steps for starting with this image:
+#   vagrant destroy -f && vagrant up
+#   vagrant ssh
+# Inside running machine:
+#   cd /vagrant
+#   sudo docker-compose -f docker-compose-dev.yml up -d && sleep 60 && \
+#     docker-compose -f docker-compose-metric.yml -f docker-compose-log.yml up
+
+
+Vagrant.configure("2") do |config|
+
+  # You need to uninstall `vagrant-cachier` plugin to make this work.
+
+  if Vagrant.has_plugin?("vagrant-notify")
+    config.notify.enable = false
+  end
+
+  # Handle local proxy settings
+  if Vagrant.has_plugin?("vagrant-proxyconf")
+    if ENV["http_proxy"]
+      config.proxy.http = ENV["http_proxy"]
+    end
+    if ENV["https_proxy"]
+      config.proxy.https = ENV["https_proxy"]
+    end
+    if ENV["no_proxy"]
+      config.proxy.no_proxy = ENV["no_proxy"] + ',192.168.50.10,10.0.2.15,127.0.0.1'
+    end
+  end
+
+  config.vm.hostname = "testing-old-docker"
+  config.vm.box = "centos/7"
+  config.vm.box_version = "1809.01"  # Use CentOS 7.5
+  config.vm.network "private_network",ip:"192.168.50.10"
+
+  config.vm.provider "virtualbox" do |vb|
+    vb.gui = false
+    vb.memory = "12800"
+    vb.cpus = 4
+    # vb.customize ["modifyvm", :id, "--cpuexecutioncap", "50"]
+  end
+
+  config.vm.provision "shell", privileged: false, inline: <<-SHELL
+    set -x
+
+    sudo yum -y install wget git libcgroup libtool-ltdl libseccomp policycoreutils-python
+
+    mkdir -p ~/docker
+    cd ~/docker
+    wget https://yum.dockerproject.org/repo/main/centos/7/Packages/docker-engine-1.12.6-1.el7.centos.x86_64.rpm \
+    https://yum.dockerproject.org/repo/main/centos/7/Packages/docker-engine-selinux-1.12.6-1.el7.centos.noarch.rpm
+
+    # Hack for vagrant-proxyconf plugin...
+    sudo mkdir -p /etc/systemd/system/docker.service.d
+    sudo sh -c 'echo -e "[Service]\nEnvironmentFile=-/etc/sysconfig/docker" >> /etc/systemd/system/docker.service.d/http-proxy.conf'
+
+    sudo rpm -ivh docker-engine-1.12.6-1.el7.centos.x86_64.rpm docker-engine-selinux-1.12.6-1.el7.centos.noarch.rpm
+    sudo systemctl enable docker.service
+    sudo systemctl start docker.service
+
+    sudo curl -L https://github.com/docker/compose/releases/download/1.12.0/docker-compose-`uname -s`-`uname -m` -o /usr/bin/docker-compose
+    sudo chmod +x /usr/bin/docker-compose
+
+  SHELL
+
+end