# Licensed to the Apache Software Foundation (ASF) under one or more
# contributor license agreements.  See the NOTICE file distributed with
# this work for additional information regarding copyright ownership.
# The ASF licenses this file to You under the Apache License, Version 2.0
# (the "License"); you may not use this file except in compliance with
# the License.  You may obtain a copy of the License at
# 
#    http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
# -*- mode: ruby -*-
# vi: set ft=ruby :

SECONDARIES=0
NET_PREFIX="192.168.56."

NODES={"primary" => NET_PREFIX + "5"}
(0..SECONDARIES-1).each do |i| NODES["secondary#{i}"] = NET_PREFIX + (6 + i).to_s end

# create hosts
File.open('.vagrant/hosts', 'w') do |file|
  file.write("127.0.0.1\tlocalhost\n")
  file.write("\n# cluster nodes\n")
  NODES.each do |name, ip| file.write("#{ip}\t#{name}\n") end
end

Vagrant.configure(2) do |config|
  # config.vm.box = "ubuntu/focal64"
  config.vm.box = "bento/ubuntu-20.04"
  config.vm.synced_folder "../", "/vagrant"
  config.vm.boot_timeout = 600
  # heron-ui
  config.vm.network "forwarded_port", guest: 8889, host: 8889

  config.vm.define "primary" do |primary|
    primary.vm.provider "virtualbox" do |v|
      host = RbConfig::CONFIG['host_os']
      mem_ratio = 1.0/2
      cpu_exec_cap = 75
      # Give VM 1/2 system memory & access to all cpu cores on the host
      if host =~ /darwin/
        cpus = `sysctl -n hw.ncpu`.to_i
        # sysctl returns Bytes and we need to convert to MB
        mem = `sysctl -n hw.memsize`.to_f / 1024**2 * mem_ratio
      elsif host =~ /linux/
        cpus = `nproc`.to_i
        # meminfo shows KB and we need to convert to MB
        mem = `grep 'MemTotal' /proc/meminfo | sed -E -e 's/MemTotal:\\s+//' -e 's/ kB//'`.to_i / 1024 * mem_ratio
      else # Windows folks
        cpus = `wmic cpu get NumberOfCores`.split("\n")[2].to_i
        mem = `wmic OS get TotalVisibleMemorySize`.split("\n")[2].to_i / 1024 * mem_ratio
      end
      mem = mem.to_i
      v.customize ["modifyvm", :id, "--cpuexecutioncap", cpu_exec_cap]
      v.memory = mem
      v.cpus = cpus
    end

    primary.vm.hostname = "primary"
    primary.vm.network :private_network, ip: NODES["primary"]

    # NB: Apache Mesos requires the use of "master"/"slave"
    primary.vm.provision "shell", path: "init.sh", args: "master"
  end

  (0..SECONDARIES-1).each do |i|
    config.vm.define "secondary#{i}" do |secondary|
      secondary.vm.provider "virtualbox" do |v|
        v.memory = 2048
        v.cpus = 2
      end

      secondary.vm.hostname = "secondary#{i}"
      secondary.vm.network :private_network, ip: NODES[secondary.vm.hostname]

      # NB: Apache Mesos requires the use of "master"/"slave"
      secondary.vm.provision "shell", path: "init.sh", args: "slave"
    end
  end
end