Azure Site Recovery - after failback, linux vm returns with walinuxagent giving error

Question

Azure Site Recovery - after failback, linux vm returns with walinuxagent giving error

EA 16

Hello.

I'm running some tests with ASR integrated with vmware environment.
My configuration server and process server are at 5.1.7295.0 version and the agent installed in my vm ubuntu 16.04 - Kernel-4.4.0-210 is the Microsoft-ASR_UA_9.48.0.0_UBUNTU-16.04-64_GA_10Apr2022_Release.tar.gz

We are performing tests on OLR (Original Location Recovery) mode and when we re-protect our linux vm that is running on azure, the vm returns with the service walinuxagent installed, although, everthing is alright, I know this service is installed by azure to run many programs in its environment.

But, when the vm return for our environment on-prem it keeps generating errors on the screen, because we don't use dhcp and other things.

I'm trying to uninstall this program walinuxagent using this commands below, that I found on the web:

systemctl stop walinuxagent # Or service walinuxagent stop
waagent -deprovision -force
rm -rf /var/lib/waagent
reboot

But whenever I restart the vm, it's back with the program UP and Running again.

See the images:

Anyone have this problem also ?

8 answers

Your answer

Answer 1

Jackson Martins 10,621 MVP Volunteer Moderator

Hi @EA
There is a issue on GH closed for Ubuntu 18.05 and a bug reported.

You can install manually the latest version on https://github.com/Azure/WALinuxAgent

The bug reported question is
https://github.com/Azure/WALinuxAgent/issues/1671

Get in touch if you need more help with this issue.

--please don't forget to Accept as answer if the reply is helpful--

Answer 2

EA 16

Hello @Jackson Martins

I took a look in the documentation you are sended of GH and I achieved install with archive .deb (https://launchpad.net/ubuntu/+archive/primary/+files/walinuxagent_2.2.45-0ubuntu1~16.04.1_amd64.deb) I downloaded the version corresponding of mine ubuntu 16.04

After reboot, I tried uninstall the service walinuxagent, where I was successful, but after the new reboot of the vm the service returned UP and Running, see the images below:

What i want to do is uninstall this service (walinuxagent) of my vm !!

Jackson Martins 10,621 Reputation points MVP Volunteer Moderator

2022-06-03T20:21:21.183+00:00

Vi que seu Ubuntu é em Portugues, então acho que você entederá o que eu escrever aqui.
Para eu entender, você tentou remover o agent e depois rebootou para tentar instalar a versão "corrigida"? mas depois do reboot o agent foi reinstalado?

Se for isso, você pode tentar fazer um reboot offline, instalar o pacote certo e depois deixar a vm on

For my understanding, did you try to remove the agent and then reboot to try to install the "corrected" version? but after the reboot the agent was reinstalled?

If so, you can try offline reboot, install the right package and then put vm on

Answer 3

@Jackson Martins I'm protecting this linux vm with ASR, I installed the agent and realized the protection with Azure Vault.

In the sequence I realized a Failover where the linux vm stayed running in the environment azure.

Reprotected the linux vm again in my environment on-prem.

I realized the Failback, linux vm running again in my environment on-prem, at this moment the vm returns with this service installed walinuxagent installed by Azure.
I'm at this point where I want to remove this service walinuxagent, because this stays generating errors of DHCP between others (The Microsoft Azure Linux Agent (waagent) manages Linux & FreeBSD provisioning, and VM interaction with the Azure Fabric Controller.).

I verified the official documentation in the microsoft (https://learn.microsoft.com/en-us/azure/virtual-machines/extensions/agent-linux) and in the GH (https://github.com/Azure/WALinuxAgent), but i can't remove this service because why every time i try to remove it, when reboot the vm the service returns Up and Running.

Estou protegendo essa vm linux via asr, instalei o agent e fiz a proteção na azure.

Na sequencia realizei um failover, aonde a vm linux ficou rodando no ambiente azure.

Reprotegi a vm linux novamente no meu ambiente on-prem.

Realizei o failback, vm linux rodando novamente no meu ambiente on-prem, nesse momento a vm retorna com o serviço walinuxagent instalado pela Azure, estou nesse ponto aonde quero remover esse serviço walinuxagent, pois ele fica gerando erros de dhcp entre outros, (The Microsoft Azure Linux Agent (waagent) manages Linux & FreeBSD provisioning, and VM interaction with the Azure Fabric Controller.).

já verifiquei a documentação oficial da microsoft (https://learn.microsoft.com/en-us/azure/virtual-machines/extensions/agent-linux) e já tentei ver no GH (https://github.com/Azure/WALinuxAgent) mais não consigo remover esse serviço, pois toda vez que tento remove-lo, ao dar um reboot na vm o serviço volta ativo e rodando.

Jackson Martins 10,621 Reputation points MVP Volunteer Moderator

2022-06-06T13:16:24.22+00:00

you can try remove agent artifacts

note from Microsoft
Important

You can remove all associated artifacts of the Linux Agent, but this will mean you cannot reinstall it at a later date. Therefore, it is strongly recommended you consider disabling the Linux Agent first, removing the Linux Agent using the above only.

apt -y purge walinuxagent
rm -rf /var/lib/waagent
rm -f /var/log/waagent.log

Reference: https://learn.microsoft.com/en-us/azure/virtual-machines/linux/disable-provisioning

Get in touch if you need more help with this issue.

--please don't forget to Accept as answer if the reply is helpful--

Answer 4

EA 16

@Jackson Martins that's exactly what I did following the official documentation, but it did not work out, whenever restarted the vm the service walinuxagent returns up and running.
I have no idea, it's very crazy, looks like the vm is in "freeze state".

Jackson Martins 10,621 Reputation points MVP Volunteer Moderator

2022-06-06T18:54:47.833+00:00

I don't know if this would be a solution, but you can try remove agent, create folder and remove permissions from the folder or lock it.
Jackson Martins 10,621 Reputation points MVP Volunteer Moderator

2022-06-06T19:04:53.603+00:00

and thus prevent the installation of the agent, because it will give an error when trying to automatic install

Answer 5

EA 16

Doesn't work @Jackson Martins . I don't have more idea.

The only way it's, after vm boot, login in the cli and stop the service with the command: systemctl stop walinuxagent

Jackson Martins 10,621 Reputation points MVP Volunteer Moderator

2022-06-07T21:23:31.983+00:00

unfortunately,
I see two ways, create a script to stop the service on startup and create a script to monitor when the folder is created run the command to remove the service.

Something like:

kill -9 $(ps aux | grep 'waagent' | awk '{print $2}')
sleep 7s
rm -rf /var/lib/waagent

"O jeito vai ser dar um disable no serviço e colocar um comando para stopar quando iniciar junto com a vm, pode também criar um script para monitorar se o serviço estiver rodando e matar"

Get in touch if you need more help with this issue.

--please don't forget to Accept as answer if the reply is helpful--

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Azure Site Recovery - after failback, linux vm returns with walinuxagent giving error

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