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How do I set the hostname of an instance in GCE permanently? I can set it via hostname,but after reboot it is gone again.
I tried to feed in metadata (hostname:f.q.d.n), but that did not do the job. But it should work via metadata (https://github.com/GoogleCloudPlatform/compute-image-packages/tree/master/google-startup-scripts).
Anybody an idea?
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When you create a virtual machine (VM) instance, Google Cloud creates an internal DNS name from the VM name. Unless you specify a custom hostname, Google Cloud uses the automatically created internal DNS name as the hostname it provides to the VM.
In the Google Cloud console, go to the Custom Domains tab of the App Engine Settings page. Click Add a custom domain. If your domain is already verified, the domain appears in the Select the domain you want to use section. Select the domain from the drop-down menu and click Continue.
The free usage limit does not expire, but is subject to change. Available for eligible customers. Scalable, high-performance virtual machines. Best-in-class performance, reliability, and pricing for all your storage needs.
From Google's documentation: It is possible to attach a persistent disk to more than one instance. However, if you attach a persistent disk to multiple instances, all instances must attach the persistent disk in read-only mode. It is not possible to attach the persistent disk to multiple instances in read-write mode.
The most simple way to achieve it is creating a simple script and that's what I have done.
I have stored the hostname in the instance metadata and then I retrieve it every time the system restarts in order to set the hostname using a cron job.
$ gcloud compute instances add-metadata <instance> --metadata hostname=<new_hostname>
$ sudo crontab -e
And this is the line that must be appended in crontab
@reboot hostname $(curl --silent "http://metadata.google.internal/computeMetadata/v1/instance/attributes/hostname" -H "Metadata-Flavor: Google")
After these steps, every time you restart your instance it will have the hostname <new_hostname>.
You can check it in the prompt or with the command: hostname
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Need to remove file /etc/dhcp/dhclient.d/google_hostname.sh
rm -rf /etc/dhcp/dhclient.d/google_hostname.sh
rm -rf /etc/dhcp/dhclient-exit-hooks.d/google_set_hostname
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