Data lost on one of my VM instances

[Joel Mandébi]

Hey I'm facing a strange problem.

One of my VM instances just lost all its data. I had some java applications running. Without any apparent reason, all the applications just stopped working. When I remotely accessed my VM by SSH, all my data had been erased, only the operating system and applications installed in the operating system are still there. Even the "apt-get" isn't working anymore (Look at a copy of my terminal down here).

-bash-4.2$ apt-get install java

-bash: apt-get: command not found

-bash-4.2$ 

 Finally I'm seeing "bash-4.2$ " in the prompt instead of my username. I'm really confused about what is actually going on. Can anyone help me? 

Thanks in advance

[Paul Nash]

Hi Joel, sorry to hear that. Hard to say if this is an application level issue or a system issue. For starters, can you tell us more about the VM? Like, what region/zone is it running in? Do you just have one disk attached? Is this a normal VM, or preemptible? How did you create the VM, e.g., did you create it from Cloud Launcher, or is it created from gcloud or the web console? What other software was running on the machine, and how long was the VM successfully running for before this? Is there anything ti indicate that it has reboot recently, or any information in the system logs indicating a problem? How was your data stored (database, on disk somewhere, etc)?

I don't have any immediate answers, but these details might help the support team brainstorm what the issue could be.

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[Joel Mandébi]

Thanks for you answer.

Well I'm doing some java web development so I installed Glassfish server 4.1 and Mysql. Everything was fine until the hard drive of the VM got almost full. The Web application started becoming slow and I couldn't connect using ssh so I rebooted the VM 2 days ago. I then could connect remotely to free some space(deleted unused files...). The same problem happened again today so I rebooted the computer but this time everything had just disappeared when I got to the VM using SSH.

Details about the VM

- Machine type: n1-standard-2 (2 vCPUs, 7.5 GB memory)

-CPU platform: Intel Sandy Bridge

- region/zone: us-central1-a

- I have a "standard persistent disk" of 25 GB from which the system boots and another one of 20 GB

- It is a normal VM

- A created the VM from the web console

- Data were stored in a Mysql database and also I had some files on the disk 

Le dimanche 22 janvier 2017 22:01:32 UTC-6, Paul Nash a écrit :

Hi Joel, sorry to hear that. Hard to say if this is an application level issue or a system issue. For starters, can you tell us more about the VM? Like, what region/zone is it running in? Do you just have one disk attached? Is this a normal VM, or preemptible? How did you create the VM, e.g., did you create it from Cloud Launcher, or is it created from gcloud or the web console? What other software was running on the machine, and how long was the VM successfully running for before this? Is there anything ti indicate that it has reboot recently, or any information in the system logs indicating a problem? How was your data stored (database, on disk somewhere, etc)?

I don't have any immediate answers, but these details might help the support team brainstorm what the issue could be.

On Sun, Jan 22, 2017 at 7:52 PM, Joel Mandébi <joelm...@gmail.com> wrote:

Hey I'm facing a strange problem.

One of my VM instances just lost all its data. I had some java applications running. Without any apparent reason, all the applications just stopped working. When I remotely accessed my VM by SSH, all my data had been erased, only the operating system and applications installed in the operating system are still there. Even the "apt-get" isn't working anymore (Look at a copy of my terminal down here).

-bash-4.2$ apt-get install java

-bash: apt-get: command not found

-bash-4.2$ 

 Finally I'm seeing "bash-4.2$ " in the prompt instead of my username. I'm really confused about what is actually going on. Can anyone help me? 

Thanks in advance

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[Carlos (Cloud Platform Support)]

Hi Joel,

Have you checked the messages on the serial console? You can get them from the CLI or by accessing your Cloud Console -> Compute Engine-> VM Instances -> “your VM” -> View Serial Port.   The output might provide additional information. What does your application logs indicate?.   I can only think on one scenario where information is deleted: using Local SSDs and stooping or deleting the VM.