Automatic Addition of Secondary IP Addresses in Azure fails

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Environment

SUSE Linux Enterprise Server 15 All Service Packs
SUSE Linux Enterprise Server 12 All Service Packs

Situation

Secondary TCPIP configurations based on Microsoft Azure IP settings are not automatically added after server reboots.

Failure to automatically add newly assigned secondary TCPIP addresses from Microsoft Azure IP configurations to SLES servers.

Resolution

Preferred Solution:

The cloud-netconfig package has been updated to correct this issue.

On SLES 15 with Public Cloud module, or on SLE Micro 5.x, the fix first appears in:

cloud-netconfig 1.8-150000.25.11.1

On SLES 12 with Public Cloud module, the fix first appears in:

cloud-netconfig 1.8-30.1

Alternative workaround:

If applying updates is not possible, a workaround exists:

1. Edit the network card configuration you wish to add the secondary IP address. For example, if your NIC is named "eth0" then the configuration file is /etc/sysconfig/network/ifcfg-eth0

2. Within that file, add the following contents:

CLOUD_NETCONFIG_MANAGE='yes' 
IPADDR_1='10.0.0.99/24' # Replace with the desired secondary IP address and subnet mask BOOTPROTO='dhcp' 
STARTMODE='auto' 
LABEL_1='<label of your choice>'

Replace 10.0.0.99/24 with your desired secondary IP address and subnet mask. Choose a label for LABEL_1 that makes sense for your use case.

3. After making the changes, save the file and restart the network services by running the following command:

systemctl restart wicked.service

Keep in mind that restarting the network services may result in a temporary disconnection of clients.

Following these steps, you can successfully add a secondary IP address to your system.

Cause

Recent changes in how Azure virtual metadata can be accessed have disrupted the functionality of "cloud-netconfig". As a result, the necessary data for adding IP addresses to network cards is not being retrieved successfully.

Disclaimer

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