#!/usr/bin/env bash
#
# Copyright 2017-present Open Networking Foundation
#
# Licensed 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.

# cord-in-a-box.sh

set -e -x

# start time, used to name logfiles
START_T=$(date -u "+%Y%m%d_%H%M%SZ")

# Paths
CORDDIR=~/cord
VMDIR=/opt/cord/build/
CONFIG=config/cord_in_a_box.yml
SSHCONFIG=~/.ssh/config
VAGRANT_CWD=${CORDDIR}/build/
VAGRANT_VM_PREFIX=build

# CORD versioning
REPO_BRANCH="master"
VERSION_STRING="CiaB Devel"

function finish {
    EXIT=$?
    python $CORDDIR/build/elk-logger/mixpanel --event FINISH --corddir $CORDDIR --finish --status $EXIT
}

function add_box() {
  vagrant box list | grep $1 | grep virtualbox || vagrant box add $1
  vagrant box list | grep $1 | grep libvirt || vagrant mutate $1 libvirt --input-provider virtualbox
}

function run_stage {
    cd $CORDDIR
    python build/elk-logger/mixpanel --event $1-start --corddir $CORDDIR

    echo "==> "$1": Starting"
    $1
    echo "==> "$1": Complete"

    cd $CORDDIR
    python build/elk-logger/mixpanel --event $1-end --corddir $CORDDIR
}

function cleanup_from_previous_test() {
  echo "## Cleanup ##"

  if [ -d $CORDDIR/build ]
  then
    echo "Destroying all Vagrant VMs"
    cd $CORDDIR/build
    for i in `seq 12`; do
      sudo su $USER -c "VAGRANT_CWD=$VAGRANT_CWD vagrant destroy" && break
    done
  fi

  echo "Removing $CORDDIR"
  cd ~
  rm -rf $CORDDIR
}

function bootstrap() {

  echo "Generating build id"
  rm -f /tmp/cord-build-version
  dd bs=18 count=1 if=/dev/urandom | base64 | tr +/ _. > /tmp/cord-build

  if [ ! -x "/usr/local/bin/repo" ]
  then
    echo "Installing repo..."
    REPO_SHA256SUM="394d93ac7261d59db58afa49bb5f88386fea8518792491ee3db8baab49c3ecda"
    curl -o /tmp/repo 'https://gerrit.opencord.org/gitweb?p=repo.git;a=blob_plain;f=repo;hb=refs/heads/stable'
    echo "$REPO_SHA256SUM  /tmp/repo" | sha256sum -c -
    sudo mv /tmp/repo /usr/local/bin/repo
    sudo chmod a+x /usr/local/bin/repo
  fi

  if [ ! -x "/usr/bin/vagrant" ]
  then
    echo "Installing vagrant and associated tools..."
    VAGRANT_SHA256SUM="faff6befacc7eed3978b4b71f0dbb9c135c01d8a4d13236bda2f9ed53482d2c4"  # version 1.9.3
    curl -o /tmp/vagrant.deb https://releases.hashicorp.com/vagrant/1.9.3/vagrant_1.9.3_x86_64.deb
    echo "$VAGRANT_SHA256SUM  /tmp/vagrant.deb" | sha256sum -c -
    sudo apt-get update
    sudo dpkg -i /tmp/vagrant.deb
    sudo apt-get -y install qemu-kvm libvirt-bin libvirt-dev curl nfs-kernel-server git build-essential python-pip
    sudo adduser $USER libvirtd
    sudo pip install pyparsing python-logstash mixpanel
  fi

  echo "Installing vagrant plugins..."
  vagrant plugin list | grep vagrant-libvirt || vagrant plugin install vagrant-libvirt --plugin-version 0.0.35
  vagrant plugin list | grep vagrant-mutate || vagrant plugin install vagrant-mutate

  add_box ubuntu/trusty64

  echo "Creating SSH key..."
  [ -e ~/.ssh/id_rsa ] || ssh-keygen -t rsa -N "" -f ~/.ssh/id_rsa

  if [ ! -d "$CORDDIR" ]
  then
    echo "Downloading CORD/XOS..."

    if [ ! -e "~/.gitconfig" ]
    then
      echo "No ~/.gitconfig, setting testing defaults"
      git config --global user.name 'Test User'
      git config --global user.email 'test@null.com'
      git config --global color.ui false
    fi

    # make sure we can find gerrit.opencord.org as DNS failures will fail the build
    dig +short gerrit.opencord.org || (echo "ERROR: gerrit.opencord.org can't be looked up in DNS" && exit 1)

    mkdir $CORDDIR && cd $CORDDIR
    repo init -u https://gerrit.opencord.org/manifest -b $REPO_BRANCH
    repo sync

    # check out gerrit branches using repo
    for gerrit_branch in ${GERRIT_BRANCHES[@]}; do
      echo "Checking out opencord gerrit branch: $gerrit_branch"
      repo download ${gerrit_branch/:/ }
    done
  fi

  exec > >(tee -i $CORDDIR/install.out)
  exec 2>&1

  # Start tracking failures from this point
  trap finish EXIT

}

function cloudlab_setup() {

  # Don't do anything if not a CloudLab node
  [ ! -d /usr/local/etc/emulab ] && return

  # The watchdog will sometimes reset groups, turn it off
  if [ -e /usr/local/etc/emulab/watchdog ]
  then
    sudo /usr/bin/perl -w /usr/local/etc/emulab/watchdog stop
    sudo mv /usr/local/etc/emulab/watchdog /usr/local/etc/emulab/watchdog-disabled
  fi

  # Mount extra space, if haven't already
  if [ ! -d /mnt/extra ]
  then
    # for NVME SSD on Utah Cloudlab, not supported by mkextrafs
    if $(df | grep -q nvme0n1p1) && [ -e /usr/testbed/bin/mkextrafs ]
    then
      sudo mkdir -p /mnt/extra

      # set partition type of 4th partition to Linux, ignore errors
      echo -e "t\n4\n82\np\nw\nq" | sudo fdisk /dev/nvme0n1 || true

      sudo mkfs.ext4 /dev/nvme0n1p4
      echo "/dev/nvme0n1p4 /mnt/extra/ ext4 defaults 0 0" | sudo tee -a /etc/fstab
      sudo mount /mnt/extra
      mount | grep nvme0n1p4 || (echo "ERROR: NVME mkfs/mount failed, exiting!" && exit 1)

    elif [ -e /usr/testbed/bin/mkextrafs ]  # if on Clemson/Wisconsin Cloudlab
    then
      sudo mkdir -p /mnt/extra

      # Sometimes this command fails on the first try
      sudo /usr/testbed/bin/mkextrafs -r /dev/sdb -qf "/mnt/extra/" || sudo /usr/testbed/bin/mkextrafs -r /dev/sdb -qf "/mnt/extra/"

      # Check that the mount succeeded (sometimes mkextrafs succeeds but device not mounted)
      mount | grep sdb || (echo "ERROR: mkextrafs failed, exiting!" && exit 1)
    fi
  fi

  # replace /var/lib/libvirt/images with a symlink
  [ -d /var/lib/libvirt/images/ ] && [ ! -h /var/lib/libvirt/images ] && sudo rmdir /var/lib/libvirt/images
  sudo mkdir -p /mnt/extra/libvirt_images

  if [ ! -e /var/lib/libvirt/images ]
  then
    sudo ln -s /mnt/extra/libvirt_images /var/lib/libvirt/images
  fi
}

function elk_up() {

  cd $CORDDIR
  sudo chmod +x build/elk-logger/logstash_tail

  build/elk-logger/logstash_tail --file install.out --hostport 10.100.198.201:5617 &
}

function vagrant_vms_up() {

  echo "Bringing up CORD-in-a-Box Vagrant VM's..."
  cd $CORDDIR/build

  sudo su $USER -c "VAGRANT_CWD=$VAGRANT_CWD vagrant up corddev prod --provider libvirt"

  # This is a workaround for a weird issue with ARP cache timeout breaking 'vagrant ssh'
  # It allows SSH'ing to the machine via 'ssh corddev'
  sudo su $USER -c "VAGRANT_CWD=$VAGRANT_CWD vagrant ssh-config corddev prod > $SSHCONFIG"

  # copy host SSH keypair to corddev
  scp ~/.ssh/id_rsa* corddev:.ssh
  ssh corddev "chmod go-r ~/.ssh/id_rsa"
}

function install_head_node() {
  cd $CORDDIR/build

  # SSH config saved earlier allows us to connect to VM without running 'vagrant'
  ssh corddev "cd $VMDIR; ./gradlew -PdeployConfig=$VMDIR/$CONFIG fetch"
  ssh corddev "cd $VMDIR; ./gradlew -PdeployConfig=$VMDIR/$CONFIG buildImages"
  ssh corddev "cd $VMDIR; ping -c 3 prod; ./gradlew -PdeployConfig=$VMDIR/$CONFIG -PtargetReg=10.100.198.201:5000 publish"
  ssh corddev "cd $VMDIR; ./gradlew -PdeployConfig=$VMDIR/$CONFIG deploy"
}

function set_up_maas_user() {
  # Set up MAAS user on server to restart nodes via libvirt
  grep maas /etc/passwd || sudo useradd -m maas
  sudo adduser maas libvirtd

  # Copy generated public key to maas user's authorized_keys
  sudo su maas -c "mkdir -p ~/.ssh"
  sudo cp $HOME/.ssh/id_rsa.pub ~maas/.ssh/authorized_keys
  sudo chown maas:maas ~maas/.ssh/authorized_keys

  # Copy generated private key to maas user's home dir in prod VM
  scp $HOME/.ssh/id_rsa prod:/tmp
  ssh prod "sudo mkdir -p ~maas/.ssh"
  ssh prod "sudo cp /tmp/id_rsa ~maas/.ssh/id_rsa"
  ssh prod "sudo chown -R maas:maas ~maas/.ssh"
}

function turn_off_learning () {
  NET=$1
  BRIDGE=`sudo virsh net-info $NET|grep "Bridge:"|awk '{print $2}'`
  sudo brctl setageing $BRIDGE 0
  sudo brctl stp $BRIDGE off
}

function leaf_spine_up() {
  cd $CORDDIR/build

  if [[ $FABRIC -ne 0 ]]
  then
      sudo su $USER -c "VAGRANT_CWD=$VAGRANT_CWD FABRIC=$FABRIC vagrant up leaf-1 leaf-2 spine-1 spine-2 --provider libvirt"
  else
      # Linux bridging seems to be having issues with two spine switches
      sudo su $USER -c "VAGRANT_CWD=$VAGRANT_CWD FABRIC=$FABRIC vagrant up leaf-1 leaf-2 spine-1 --provider libvirt"
  fi

  # Turn off MAC learning on "links" -- i.e., bridges created by libvirt.
  # Without this, sometimes packets are dropped because the bridges
  # think they are not local -- this needs further investigation.
  # A better solution might be to replace the bridges with UDP tunnels, but this
  # is not supported with the version of libvirt available on Ubuntu 14.04.
  turn_off_learning head-node-leaf-1
  turn_off_learning compute-node-1-leaf-1
  turn_off_learning compute-node-2-leaf-2
  turn_off_learning compute-node-3-leaf-2
  turn_off_learning leaf-1-spine-1
  turn_off_learning leaf-1-spine-2
  turn_off_learning leaf-2-spine-1
  turn_off_learning leaf-2-spine-2
}

function add_compute_node() {
  echo add_compute_node: $1 $2

  cd $CORDDIR/build
  sudo su $USER -c "VAGRANT_CWD=$VAGRANT_CWD vagrant up $1 --provider libvirt"

  # Set up power cycling for the compute node and wait for it to be provisioned
  ssh prod "cd $VMDIR/ansible; ansible-playbook maas-provision.yml --extra-vars \"maas_user=maas vagrant_name=$2\""

  echo ""
  echo "$1 is fully provisioned!"
}

function initialize_fabric() {
  echo "Initializing fabric"
  ssh prod "cd $VMDIR/platform-install; ansible-playbook -i /etc/maas/ansible/pod-inventory cord-refresh-fabric.yml"

  echo "Fabric ping test"
  ssh prod "cd $VMDIR/platform-install; ansible-playbook -i /etc/maas/ansible/pod-inventory cord-fabric-pingtest.yml"
}

function run_e2e_test () {
  cd $CORDDIR/build

  # User has been added to the lbvirtd group, but su $USER to be safe
  ssh corddev "cd $VMDIR; ./gradlew -PdeployConfig=$VMDIR/$CONFIG postDeployTests"
}

function run_diagnostics() {
  ssh corddev "cd $VMDIR; ./gradlew -PdeployConfig=$VMDIR/$CONFIG PIrunDiag"
}

# Parse options
GERRIT_BRANCHES=
RUN_TEST=0
SETUP_ONLY=0
DIAGNOSTICS=0
CLEANUP=0
FABRIC=0
#By default, cord-in-a-box creates 1 compute node. If more than one compute is
#needed, use -n option
NUM_COMPUTE_NODES=1

while getopts "b:cdfhn:stv" opt; do
  case ${opt} in
    b ) GERRIT_BRANCHES+=("$OPTARG")
      ;;
    c ) CLEANUP=1
      ;;
    d ) DIAGNOSTICS=1
      ;;
    f ) FABRIC=1
      ;;
    h ) echo "Usage:"
      echo "    $0                install OpenStack and prep XOS and ONOS VMs [default]"
      echo "    $0 -b <project:changeset/revision>  checkout a changesets from gerrit. Can"
      echo "                      be used multiple times."
      echo "    $0 -c             cleanup from previous test"
      echo "    $0 -d             run diagnostic collector"
      echo "    $0 -f             use ONOS fabric (EXPERIMENTAL)"
      echo "    $0 -h             display this help message"
      echo "    $0 -n #           number of compute nodes to setup. Currently max 2 nodes can be supported"
      echo "    $0 -s             run initial setup phase only (don't start building CORD)"
      echo "    $0 -t             do install, bring up cord-pod configuration, run E2E test"
      echo "    $0 -v             print CiaB version and exit"
      exit 0
      ;;
    n ) NUM_COMPUTE_NODES=$OPTARG
      ;;
    s ) SETUP_ONLY=1
      ;;
    t ) RUN_TEST=1
      ;;
    v ) echo "$VERSION_STRING ($REPO_BRANCH branch)"
      exit 0
      ;;
    \? ) echo "Invalid option: -$OPTARG"
      exit 1
      ;;
  esac
done

# What to do
if [[ $CLEANUP -eq 1 ]]
then
  cleanup_from_previous_test
fi

echo ""
echo "Preparing to install $VERSION_STRING ($REPO_BRANCH branch)"
echo ""

bootstrap
run_stage cloudlab_setup
run_stage vagrant_vms_up
run_stage elk_up

if [[ $SETUP_ONLY -ne 0 ]]
then
  echo "Finished build environment setup, exiting..."
  exit 0
fi

run_stage install_head_node
run_stage set_up_maas_user
run_stage leaf_spine_up

if [[ $NUM_COMPUTE_NODES -gt 3 ]]
then
   echo "currently max only three compute nodes can be supported..."
   NUM_COMPUTE_NODES=3
fi

echo "==> Adding compute nodes: Starting"
for i in `seq 1 $NUM_COMPUTE_NODES`;
do
   echo adding the compute node: compute-node-$i
   add_compute_node compute-node-$i ${VAGRANT_VM_PREFIX}_compute-node-$i
done
echo "==> Adding compute nodes: Complete"

# run diagnostics both before/after the fabric/e2e tests
if [[ $DIAGNOSTICS -eq 1 ]]
then
  run_diagnostics
fi


if [[ $FABRIC -ne 0 ]]
then
  run_stage initialize_fabric
fi

if [[ $RUN_TEST -eq 1 ]]
then
  run_stage run_e2e_test
fi

if [[ $DIAGNOSTICS -eq 1 ]]
then
  run_stage run_diagnostics
fi

exit 0