#!/bin/bash
#
# Creates the compute instance.
#
set -x

source vm_config.sh

MACHINE_TYPE=n1-highmem-16
SOURCE_SNAPSHOT=skia-systemd-pushable-base
SCOPES='https://www.googleapis.com/auth/devstorage.full_control https://www.googleapis.com/auth/userinfo.email https://www.googleapis.com/auth/userinfo.profile'

# Create a boot disk from the pushable base snapshot.
gcloud compute --project $PROJECT_ID disks create $INSTANCE_NAME \
  --zone $ZONE \
  --source-snapshot $SOURCE_SNAPSHOT \
  --type "pd-standard"

# Create a large data disk.
gcloud compute --project $PROJECT_ID disks create $DATA_DISK_NAME \
  --size "200" \
  --zone $ZONE \
  --type "pd-ssd"

# Create the instance with the two disks attached.
gcloud compute --project $PROJECT_ID instances create $INSTANCE_NAME \
  --zone $ZONE \
  --machine-type $MACHINE_TYPE \
  --network "default" \
  --maintenance-policy "MIGRATE" \
  --scopes $SCOPES \
  --tags "http-server" "https-server" \
  --metadata-from-file "startup-script=startup-script.sh" \
  --disk name=${INSTANCE_NAME}      device-name=${INSTANCE_NAME}      "mode=rw" "boot=yes" "auto-delete=yes" \
  --disk name=${DATA_DISK_NAME} device-name=${DATA_DISK_NAME} "mode=rw" "boot=no" \
  --address=$IP_ADDRESS

WAIT_TIME_AFTER_CREATION_SECS=600
echo
echo "===== Wait $WAIT_TIME_AFTER_CREATION_SECS secs for instance to" \
  "complete startup script. ====="
echo
sleep $WAIT_TIME_AFTER_CREATION_SECS

# The instance believes it is skia-systemd-snapshot-maker until it is rebooted.
echo
echo "===== Rebooting the instance ======"
# Using "shutdown -r +1" rather than "reboot" so that the connection isn't
# terminated immediately, which causes a non-zero exit code.
gcloud compute --project $PROJECT_ID ssh $PROJECT_USER@$INSTANCE_NAME \
  --zone $ZONE \
  --command "sudo shutdown -r +1" \
  || echo "Reboot failed; please reboot the instance manually."