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

source vm_config.sh

MONITORING_MACHINE_TYPE=n1-highmem-16
MONITORING_SOURCE_SNAPSHOT=skia-systemd-pushable-base
MONITORING_SCOPES='https://www.googleapis.com/auth/devstorage.full_control https://www.googleapis.com/auth/userinfo.email https://www.googleapis.com/auth/userinfo.profile'
MONITORING_IP_ADDRESS=104.154.112.119

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

# Create a large data disk.
gcloud compute --project $PROJECT_ID disks create $INSTANCE_NAME"-data" \
  --size "1000" \
  --zone $ZONE \
  --type "pd-standard"

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

# Wait until the instance is up.
until nc -w 1 -z $MONITORING_IP_ADDRESS 22; do
    echo "Waiting for VM to come up."
    sleep 2
done

gcloud compute copy-files ../common/format_and_mount.sh $PROJECT_USER@$INSTANCE_NAME:/tmp/format_and_mount.sh --zone $ZONE

gcloud compute --project $PROJECT_ID ssh $PROJECT_USER@$INSTANCE_NAME \
  --zone $ZONE \
  --command "/tmp/format_and_mount.sh monitoring" \
  || echo "Installation failure."

# 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."