Error Logs

#Docker Container Logs

4/23/2017 9:29:13 PM Node 'hello@10.42.69.252' not responding to pings.
4/23/2017 9:29:14 PM Node 'hello@10.42.69.252' not responding to pings.
4/23/2017 9:29:14 PM Node 'hello@10.42.69.252' not responding to pings.
4/23/2017 9:29:15 PM Node 'hello@10.42.69.252' not responding to pings.
4/23/2017 9:29:16 PM 01:29:16.104 [info] Running Hello.Endpoint with Cowboy using http://localhost:8080
4/23/2017 9:29:16 PM Connecting to phoenix: [{10, 42, 69, 252}]
4/23/2017 9:29:16 PM pong
4/23/2017 9:29:16 PM Application is up!
4/23/2017 9:29:16 PM Running migrations
4/23/2017 9:29:16 PM RPC to 'hello@10.42.69.252' failed: {'EXIT',
4/23/2017 9:29:16 PM                                     {undef,
4/23/2017 9:29:16 PM                                      [{'Elixir.Release.Tasks',migrate,[],[]},
4/23/2017 9:29:16 PM                                       {rpc,'-handle_call_call/6-fun-0-',5,
4/23/2017 9:29:16 PM                                        [{file,"rpc.erl"},{line,187}]}]}}
4/23/2017 9:29:16 PM
4/23/2017 9:29:16 PM Shutting down..
4/23/2017 9:29:17 PM ok
4/23/2017 3:22:24 PM Node is not running!

which is triggered when running a post_start hook

hello

#lib/hello/rancher
defmodule Hello.Rancher do
  use GenServer

  @connect_interval 5000 # try to connect every 5 seconds

  def start_link do
    GenServer.start_link __MODULE__, [], name: __MODULE__
  end

  def init([]) do
    name = Application.fetch_env!(:hello, :rancher_service_name)
    send self, :connect

    {:ok, to_char_list(name)}
  end

  def handle_info(:connect, name) do
    case :inet_tcp.getaddrs(name) do
      {:ok, ips} ->
        IO.puts "Connecting to #{name}: #{inspect ips}"
        for {a,b,c,d} <- ips do
          Node.connect :"hello@#{a}.#{b}.#{c}.#{d}"
        end

      {:error, reason} ->
        IO.puts "Error resolving #{inspect name}: #{inspect reason}"
    end

    IO.puts "Nodes: #{inspect Node.list}"
    Process.send_after(self, :connect, @connect_interval)

    {:noreply, name}
  end
end

hello.ex

#lib/hello.ex
....
# Setting PROD on Rancher ENV Variable
if System.get_env("PROD") do
      children = children ++ [worker(Hello.Rancher, [])]
end
.....

post_start

# relhooks/post_start
set +e

while true; do
  nodetool ping
  EXIT_CODE=$?
  if [ $EXIT_CODE -eq 0 ]; then
    echo "Application is up!"
    break
  fi
done

set -e

echo "Running migrations"
bin/hello rpc Elixir.Release.Tasks migrate
echo "Migrations run successfully"

rancher_boot.sh

#!/bin/sh
#rel/rancher_boot.sh
set -e

export RANCHER_IP=$(wget -qO- http://rancher-metadata.rancher.internal/latest/self/container/primary_ip)
export RANCHER_SERVICE_NAME=$(wget -qO- http://rancher-metadata.rancher.internal/latest/self/service/name)

/opt/app/bin/hello $@

release.ex

#lib/release.ex
defmodule Release.Tasks do
  def migrate do
    {:ok, _} = Application.ensure_all_started(:hello)
    path = Application.app_dir(:hello, "priv/repo/migrations")
    Ecto.Migrator.run(Hello.Repo, path, :up, all: true)
  end
end

vm.args

# rel/vm.args
## Name of the node - this is the only change
-name hello@${RANCHER_IP}

## Cookie for distributed erlang
-setcookie insertsecrethereee

## Heartbeat management; auto-restarts VM if it dies or becomes unresponsive
## (Disabled by default..use with caution!)
##-heart

## Enable kernel poll and a few async threads
##+K true
##+A 5

## Increase number of concurrent ports/sockets
##-env ERL_MAX_PORTS 4096

## Tweak GC to run more often
##-env ERL_FULLSWEEP_AFTER 10

# Enable SMP automatically based on availability
-smp auto