I have around 30 VMs on Azure and all have static IP-Addresses. Now suddenly after a restart, one has changed to Dynamic address and got a new IP address.
This happens for 2 machines so far within a 2 weeks period.
How can that happen and how can I get back previous IP addresses since they are registered in a firewall that provides a service to us?
BR
Amin
I did reproduce your issue and found that.
Point 1: Went to ipconfig and make it as static Ip address and did check after restart and stop as well I am getting the same static Ip address.
Point 2: Manually assign the same static IP address in VM itself now I can’t connect to my VM.
So, we don't recommend to make any change on the NIC card settings on the VM.
Point 3: Permanent solution for this not to lost the static Ip address is use the PowerShell command to create a Virtual Machine with the static IP address. If you configure the settings on the NIC card, after reboot it may change the IP address, so the best way to set static IP address is as per the recommended way in the article above.
PowerShell Command to Set Static Private IP
PowerShell Command to Set Static Public IP
Reference : Azure VM looses static IP after stopping and starting the VM in the portal?
Related
I have an Azure VM with SQL Server on. There are a number of applications using this database via it's public ip address. The ip address is currently set to Dynamic and the VM requires maintenance which could change it. Is there a way of assigning a static ip address to the VM while keeping the current one active while I update the applications to use the new static one?
Is there a way of assigning a static ip address to the VM while
keeping the current one active while I update the applications to use
the new static one?
If I understand it correctly, you just want to change the public IP address to static.
We can change the public IP address to static via Azure portal, that IP address will not change.
A few days ago, the IP address of our VB Windows Server changed from 40.x.x.x to 13.x.x.x on the Azure platform. We have many loggers in the field that connect to this IP address and now, none of them can connect.
Can the IP change without any warning from Azure?
Also, there is no support to be found. No number, no online support... I mean, This is not a problem I should be paying support for... besides.. support is more expensive than the VM.
Your IP address will change if, for instance, you restart your virtual machine. However, you can set this to be static by doing so:
go to Public IP addresses
Click Configuration
Set assignment to Static
Click Save
This will retain the IP address that you have right now but at an additional cost.
Can the IP change without any warning from Azure?
For now, there is no warning when public IP address change. I think you should know IP address types and allocation methods in Azure.
There are two methods in which an IP address is allocated to a public IP resource - dynamic or static. The default allocation method is dynamic, where an IP address is not allocated at the time of its creation. Instead, the public IP address is allocated when you start (or create) the associated resource (like a VM or load balancer). The IP address is released when you stop (or delete) the resource. This causes the IP address to change when you stop and start a resource.
If you want to public IP address not change, you could change dynamic to static.
I have RM VNET and the address range is 192.168.3.0/24
I have 4 VM running on it without issue.
What I noticed here is I found the IP of the VM's get changed every alternate days and because of this the APP running on the VM's are affected.
For now I have assigned Static IP for the VM's. but need to change it to Dynamic as static IP is chargable
Is there any way to assign a static IP for the VM's without charges?
If this is referring to the free public IP assigned to you, one way to get around the cost is using a CNAME entry in your DNS pointing to your resource's FQDN. Set TTL as low as you can afford so the outside world can pick up the change fast.
Here is an article about how: http://www.codewrecks.com/blog/index.php/2015/10/11/where-is-my-dns-name-for-azure-vm-with-new-resource-manager/
If this is referring to VM's internal IP address such as 192.168.3.3, I don't believe static private IP address is chargeable.
Here is an solid article explain things:
https://azure.microsoft.com/en-us/documentation/articles/virtual-network-ip-addresses-overview-arm/
I have an Azure Cloud Service, mywebapp.cloudapp.net, that consists of two Azure VMs - mywebappvm1 and mywebappvm2. Both VMs are in the same Availability Set and have the same DNS name.
I also have a Regional Reserved IP address assigned to the Cloud Service so that I can give our clients a guaranteed IP address that our app uses.
Part of the app uses a private background process, currently only running on one of the VMs. I want to be able to make a connection to that process over TCP running on mywebappvm1 from mywebappvm2. I could use the public IP and an endpoint on mywebappvm1 but I don't want the background service to be publicly accessible.
I'm currently using the private IP address, but is that safe? Will the private IP of each VM change if it's rebooted? I can't see an easy way of fixing the private IP of each VM - that seems like something you can do with a VNET but I can't find any information on how to do it with a cloud service and an availability group as well.
Is there perhaps another way to run a web app on multiple load-balanced VMs within an availability set that would make this easier?
What you do is absolutely safe and actually a recommended best practice. You should not go out to public IP address in order to communicate between the Virtual Machines.
It is also a recommended best practice to organize your Virtual Machines into Virtual Network and sub-nets.
This excellent blog post describes how can you even use static IP addresses for the VMs, so you are always 100% sure that mywebappvm1 always get XXX.XXX.XXX.XXX IP Address andyour mywebappvm2 always get YYY.YYY.YYY.YYY IP Address.
Please note that if you do not use Static IP Address assigned to the VM, it is guaranteed that the IP Address of the VM may change.
The IP for a webRole VM instance will not change for the lifetime of the deployment regardless of reboot, update or swapping. The IP will be released only if you delete the deployment, detailed here
we need to access our partner's sql azure db, they ask for an ip so they add to the whitelist, thing is we doing the dev work on our azure vm (under different subscription), what ip should we give them, I suppose a public IP address? Will that change over time?
Thanks advance for the help!
Your VM public IP will not change unless all the VMs in that cloud service (the service holding the public IP) are stop/deallocated. Restarting the VM won't change the IP either.
I usually shutdown my VM very carefully to prevent accidentally changing my IP addresses. So far for past few years, I just tried once unintended change.
Note:
You may also consider the newly introduced Reserved IP to reserve an IP and prevent it from changing. However,
[a]t this time, you can’t reserve an IP address for a cloud service
that you have already created.
which means you could only reserve a new IP address if you would like to use Reserved IP.