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surfingonthenet
Asked: 2020-10-12 13:14:00 +0800 CST

Best way to keep high available single instance with external static IP on GCP

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once in a while we need a single server for a specific purpose that won't get high traffic. For my scenario, this server requires a static external IP

I'm wondering what is the best way to have a high-available single server with static external IP on GCP?

Usually, we'd choose to create an instance-group with 1 minimal and 1 maximum instance, but that wouldn't keep the static IP for egress traffic after an instance crash/recreation. So, I'd have to create an instance-group with no external IP and make the egress traffic going through a NAT Gateway + a Load Balancer for another static IP for the ingress traffic.

The problem is, that sounds too much for a single server.

On AWS it can be achieved in an easier way. It's just:

  1. Launching one instance
  2. Associate an external IP address to it
  3. Create a Life cycle snapshot for backing up data
  4. Create alarm to restart or restore the instance in case of system or instance failure

So, my question is: Is there some easier way to achieve this on Google Cloud Platform?

google-cloud-platform google-compute-engine

1 Answers

  1. It is entirely possible to do in GCP what you're asking but it not easier. At least from the list of steps perspective.

    Here's how you can do it:

    1. Reserve static public IP
    2. Create a VM with external IP from #1
    3. Create a Snapshot Schedule and attach it to a VM's persistent disk
    4. Create an uptime check and an alert that will publish it via pub/sub
    5. Create a GCP Scheduler job to restart desired VM based on pub/sub events.
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