VMAppExtension not running in Linux VMSS

Brano 15

Recently, VM App Extensions are not starting on VM scale set with Linux OS (Ubuntu 22_04-lts-gen2). It's failing with:

The handler for VM extension type 'Microsoft.CPlat.Core.VMApplicationManagerLinux' has reported terminal failure for VM extension 'VMAppExtension' with error message: '[ExtensionOperationError] Non-zero exit code: 127, /var/lib/waagent/Microsoft.CPlat.Core.VMApplicationManagerLinux-1.0.12/bin/install.sh [stdout] [stderr] /usr/bin/env: ‘bash\r’: No such file or directory '. 'Install handler failed for the extension. More information on troubleshooting is available at https://aka.ms/vmextensionlinuxtroubleshoot'

I tried to SSH to the VM and manually execute the script with the same error. When using dos2unix to convert line endings, script is not failing locally. Could there be some issue with the file format of the install.sh in the VMAppExtension?

Pierre HARDY 21 Reputation points

2023-04-26T18:10:22.38+00:00

I have the same problem but with a Linux virtual machines (ubuntu 18.04 and 20.04)

DL-3648 10

Same error with 1.0.12 on multiple linux distros. It looks like bad line endings, use cat -e to display content, are causing the install.sh script to fail. Version 1.0.11 install.sh has line endings as $ only.

cat -e /var/lib/waagent/Microsoft.CPlat.Core.VMApplicationManagerLinux-1.0.12/bin/install.sh

#!/usr/bin/env bash^M$
set -euo pipefail^M$
^M$
readonly SCRIPT_DIR=$(dirname "$0")^M$
readonly ARCHITECTURE=$( [[ "$(uname -p)" == "unknown" ]] && echo "$(uname -m)" || echo "$(uname -p)" ) #ternary operator^M$
^M$
if [ $ARCHITECTURE == "arm64" ] || [ $ARCHITECTURE == "aarch64" ]; then^M$
    mv -f "$SCRIPT_DIR/extension-launcher-arm64" "$SCRIPT_DIR/extension-launcher"^M$
    mv -f "$SCRIPT_DIR/vm-application-manager-arm64" "$SCRIPT_DIR/vm-application-manager"^M$
else^M$
    rm -f "$SCRIPT_DIR/extension-launcher-arm64"^M$
    rm -f "$SCRIPT_DIR/vm-application-manager-arm64"^M$
fi^M$
^M$

Also, the extension status is listed as 'Failed' but attempts to remove it with powershell had no effect.

Remove-AzVMExtension -VMName $vm.Name -ResourceGroupName $vm.ResourceGroupName -Name VMAppExtension
Virtual machine extension removal operation
This cmdlet will remove the specified virtual machine extension. Do you want to continue?
[Y] Yes  [N] No  [S] Suspend  [?] Help (default is "Y"): y

RequestId IsSuccessStatusCode StatusCode ReasonPhrase
--------- ------------------- ---------- ------------
                         True  NoContent No Content

In order to clear everything up I had to select "Extension + Applications", "VM Applications" tab, then uninstall the app. That action removed both the app (which oddly enough was listed as successfully installed - definitely not the case) and the VMAppExtension.

vantubbe 0 Reputation points

2023-05-01T16:44:23.4+00:00

I've been experiencing this issue as well. I'm assuming we could work around by installing an application with a custom script, but defeats the whole point of using VM applications.
NGANDU-BISEBA Gabriel 20 Reputation points

2023-05-03T05:39:42.94+00:00

We also have the same issue. Microsoft should really start looking at this and answering this issue because there is nothing us user can do to mitigate the problem.
DL-3648 10 Reputation points

2023-05-05T03:28:09.9066667+00:00

Quick update to the 4 other people in the world using this Azure feature:

I have a support ticket open with Microsoft since last Friday. A few emails back and forth trying to setup screen share TS session. I explained this can be recreated in the region my VMs run for any newly deployed linux distro (probably every Azure region with v1.0.12 linux vmapp extension) and the line ending problem is not going to be specific to our tenant. Waiting on further support feedback.

1 answer

DL-3648 10 Reputation points

2023-05-08T19:42:33.6666667+00:00

v1.0.13 has been released (in all US regions at least) with proper line endings for linux systems. Test deploys are running as expected.
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