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distribution: architecture, security, cost estimation, creation, operations, and more #1284

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Jul 28, 2020
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distribution: architecture, security, cost estimation, creation, operations, and more #1284

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62c4dd5
distribution: extensive managed instances docs
slimsag Jul 14, 2020
4ce577e
fixup!
slimsag Jul 23, 2020
92be500
fixup!
slimsag Jul 27, 2020
104731f
note cost savings
slimsag Jul 27, 2020
3b23bdd
fixup!
slimsag Jul 28, 2020
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fixup!
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@slimsag
slimsag committed Jul 28, 2020
commit 3b23bdd3e9cfefe29cd73f06dcf863fd8578c96d
22 changes: 22 additions & 0 deletions handbook/engineering/distribution/managed/creation_process.md
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Expand Up @@ -39,3 +39,25 @@ Creating a new managed instance involves following the steps below.
1. Configure `externalURL` in the site configuration, and use SSH to restart the server (`sudo su`, `shutdown -r`) wait for it to come back up and access it again.
1. In the global user settings, set `"alerts.showPatchUpdates": false`
1. In the GCP web UI under **Network services** > **Load balancers** > select the load balancer > watch the SSL certificate status. It may take some time for it to become active (~1h41m) / for Google to see the DNS change from Cloudflare. Confirm it is active by following ["Access through the GCP load balancer as a user would"](#access-through-the-gcp-load-balancer-as-a-user-would).
1. In the site configuration, configure alerting to go to our `#alerts-managed-instances` Slack channel, for example (replace `$COMPANY` with the actual company name, and `$WEBHOOK_URL` with the actual webhook URL from 1password **Managed instances** > `#alerts-managed-instances Slack webhook URL`):

```
"observability.alerts": [
{
"level": "critical",
"notifier": {
"type": "slack",
"username": "$COMPANY",
"url": "$WEBHOOK_URL"
}
},
{
"level": "warning",
"notifier": {
"type": "slack",
"username": "$COMPANY",
"url": "$WEBHOOK_URL"
}
}
],
```
18 changes: 17 additions & 1 deletion handbook/engineering/distribution/managed/operations.md
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Expand Up @@ -27,9 +27,25 @@ During an upgrade, both `default-red-instance` and `default-black-instance` woul
Locate the GCP instance you'd like to access (usually either `default-red-instance` or `default-black-instance`), and then:

```sh
gcloud beta compute ssh --zone "us-central1-f" --tunnel-through-iap --project "sourcegraph-managed-$COMPANY" default-red-instance
$ gcloud beta compute ssh --zone "us-central1-f" --tunnel-through-iap --project "sourcegraph-managed-$COMPANY" default-red-instance
```

If you get an error:

```sh
ERROR: (gcloud.beta.compute.start-iap-tunnel) Error while connecting [4003: u'failed to connect to backend'].
ssh_exchange_identification: Connection closed by remote host
ERROR: (gcloud.beta.compute.ssh) [/usr/bin/ssh] exited with return code [255].
```

This may be indicating that the VM is currently not running - check:

```sh
$ gcloud beta compute instances list --project=sourcegraph-managed-$COMPANY
```

And start the instance if needed (e.g. through the web UI.)

## Port-forwarding (direct access to Caddy, Jaeger, and Grafana)

Locate the GCP instance you'd like to access (usually either `default-red-instance` or `default-black-instance`), and then:
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