I'm replacing a legacy GCE VM with an static external IP address with a new VM with that same address.
I want to validate that the new VM works before moving the external IP address to the new machine and tearing down the old one.
Is there a way to do this without downtime and tearing down the old VM?
I found an answer on my own. This can be done through the following steps:
Going to the old VM and stopping it as an external IP cannot be released if it's in use.
Then go to IP addresses within that VPC network and select Release Static Address.
Reserve that IP address and assign to the new VM.
Note that these steps cannot be performed without downtime of the old VM as it will need to be stoped to release it's IP address.
Ideally this should be setup using a domain and a DNS A record instead.
Related
I need to get new external IP address every time when I recreate my instance.
Current implementation may use previous ips.
How can I achieve the goal with static or ephemeral ips?
Or how can I get GCE ips pool?
I am adding bellow information with Kolban.
For the external IP Google cloud has two categories:
Static external IP addresses
Ephemeral external IP addresses
The basic difference between these two are Static one is long term assignment until hey are explicitly released from that assignment, and remain attached to a resource until they are explicitly detached. Where, Ephemeral remain attached to a VM instance only until the VM is stopped and restarted or the instance is terminated. If an instance is stopped, any ephemeral external IP addresses that are assigned to the instance are released back into the general Compute Engine pool and become available for use by other projects.
As you are wishing for the new IP address for your instance, it seems Ephemeral external IP addresses is a better choice. But you can use the Static external IP addresses to create an IP pool anyway and rotate your reserved static external IP address, which has cost implications.
The external IP are configured in the accessConfigs. You can see accessConfigs if you describe your instance by below command in cloud shell.
$ gcloud compute instances describe [INSTANCE_NAME] --zone=[ZONE]
You can create a new VM and assign a static IP with the help of the Document and below command.
$ gcloud compute instances create [INSTANCE_NAME] --private-network-ip [IP_ADDRESS]
OR
You can change or assign an external IP in your existing VM following the steps of the document (GCLOUD), which are:
[Optional] Reserve a static external IP address (if you want to have the reserve external IP and this has cost implications).
Delete existing access configs.
Add the new external IP address.
When you create a Compute Engine instance and give it a public IP address you have two choices for that IP. It can either be ephemeral ... this means that the IP address is assigned (randomly) by Google and may change the next time the Compute Engine is restarted. The alternative is that it is static. These are IP addresses that Google fixes for you and are explicitly yours until you release them. There is no charge for a static IP address if it is actively being used (eg has a Compute Engine running that is using it). However if unused, you are charged 24 cents a day (1 cent an hour).
If, for some reason, you need a new IP address for a compute engine on demand, you can reserve a new static IP address and associate that with your compute engine.
See also:
Reserving a static external IP address
I want to be able to change the IP address on my Elastic Beanstalk instance regularly. It doesn't seem to change every time I restart it or change the code, how can I force it to update the IP address?
The IP Address changes when you do an Environment Rebuild. During a rebuild, the underlying resources are all destroyed and created again resulting in your instances having different IP addresses.
I have posted a comprehensive guide on how this can be achieved in another question.
I recently installed minishift, the openshift origin environment built on docker on my laptop. The instance works fine at the first time when installed. However, when I poweroff my machine and then try to start the system again, it fails.
The issue is the ip address assigned while provisioning the VM first time changes when the system is restarted.
The issue doesn't persist when I delete the VM and then start it again. What's the solution for this? I have tried several possible solutions provided on the internet.
I have also tried --host-only-cidr "192.168.99.1/24" to minishift while starting it for the first time. But that didn't help either.
I have found the solution. Though it requires using a third party script, currently there's no provision to assign static ip to Virtualbox VMs. I have used the library https://github.com/ahilbig/docker-machine-ipconfig and performed the steps followed, which provide a static ip address for minishift. The command is
minishift-ipconfig static <your_ip_address>
Please note the ip address should be the same which was assigned while creating the VM.
I'm trying to build a webserver in Google Cloud Platform that hosts multiple websites (GBP, IE, FR, DK etc.)
Generally, we assign a range of IPs to the server statically, set the bindings in IIS, then loadbalance using a virtual IP.
It seems near enough impossible to assign another internal IP in GCP. Lots of guides about additional external IPs, but we don't want a public facing webserver like this.
Anybody have any idea on how to add additional internal IPs to a VM / Instance?
Also, I have tried changing the internal address I have assigned to the Instance to static in network adapter settings, next thing I know I can't access my VM for love nor money, had to delete and re-create. If I go into advanced settings to add additional static IPs, w'ere set to DHCP apparently, so can't add additional IPs.
Thanks all.
Answer that I recieved from GCE discussion group, in Google Groups:
"You can add additional internal IP addresses to a VM instance. This is possible by enabling IP forwarding for the VM, creating a static network route, adding appropriate firewall rules, and setting additional internal IP addresses to network adapter of Windows. These steps are described in this article for Linux machines (https://cloud.google.com/compute/docs/networking#set_a_static_target_ip_address). The same steps are valid for Windows VMs. You will need to keep the initial internal IP address, subnet mask, gateway address and DNS settings of the adapter and manually enter them in properties of IPv4 of the network adapter. The below is a screenshot of my configuration on a VM instance (Windows 2008 R2) that perfectly works."
Update:
Now, you can create instances with multiple network interfaces On Google Compute Engine and assign IPs. For more information, refer to this public documentation link. However, currently it has following limitations:
Alias IP ranges are not supported on any network interface on a VM
that has multiple network interfaces enabled.
You cannot modify or delete the network interfaces after the VM has
been created.
I have a google VM Instance Group setup so I can use autoscale (currently turned off until I'm ready to load test) when traffic/requests increase. I'm running a standard LAMP stack to run CraftCMS.
For some reason, the static IP address keeps changing making it unavailable to update via SSH through the console. When the IP changes, my LAMP stack is gone and I have to reinstall everything.
I tried claiming a static ip address and applying it to the VM Instance but that seems to do nothing.
How do I setup a Managed Group instance so this stops happening. If the ip address keeps changing, how can I setup the A Name DNS settings so that when you go to the actual URL it points to the correct server?
It all seems to work fine when I don't setup a Managed Group Instance but a regular VM Instance. But I want autoscaling to be on so I don't have to manually manage it.
Any help with this would make my day...