Troubleshooting
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Support
Section titled “Support”If you have questions that are not answered here or in other documentation, create a service request in the STACKIT Help Center.
Common issues (NLB + ALB)
Section titled “Common issues (NLB + ALB)”The following issues apply to both STACKIT Network Load Balancer and Application Load Balancer:
Security group assignment to target virtual machines
Section titled “Security group assignment to target virtual machines”Works as intended: All required security groups for STACKIT Load Balancers, including traffic configurations to target virtual machines, are created and assigned automatically during setup. No manual steps are needed.
For example: When you create a load balancer named “demo-lb-01”, a security group named loadbalancer/demo-lb-01/backend is created and added to the servers in the target pool. Ingress ports open according to the ports configured in the target pool.
Internal IP addresses may change after OpenStack resource loss
Section titled “Internal IP addresses may change after OpenStack resource loss”Internal IP addresses are dynamically assigned using OpenStack DHCP. During normal operation, the same internal IP address is reassigned. However, if OpenStack resources are lost, the internal IP address may change.
Loss of all connections during failover
Section titled “Loss of all connections during failover”Because of the active/passive configuration, a connection reset will occur during failover, which may take up to a few seconds. Additionally, sessions will not be transferred to the new VM and clients will need to reconnect.
NLB-specific issues
Section titled “NLB-specific issues”This section lists current known issues for STACKIT Network Load Balancer.
Service plans currently only available via API
Section titled “Service plans currently only available via API”We are currently working on a change to bring service plans as an option into our STACKIT Portal UI and developer tools. For now, you can create your load balancer with the tool of your choice and then use an API call to modify your plan.
Terraform or OpenTofu tries to change the security group of my target servers when using STACKIT Network Load Balancer
Section titled “Terraform or OpenTofu tries to change the security group of my target servers when using STACKIT Network Load Balancer”This is expected. STACKIT Network Load Balancer automatically creates and updates security groups for its targets. The security group field will change accordingly. To avoid this behavior in Terraform, use the lifecycle meta-argument.
If you want to manage your security groups manually, you can use the disableTargetSecurityGroupAssignment option. You can find more details about target security groups under “basic concepts”.
ALB-specific issues
Section titled “ALB-specific issues”This section lists current known issues for STACKIT Application Load Balancer.
Creation currently only available through API
Section titled “Creation currently only available through API”You can create Application Load Balancers only via the API. A portal interface is in development.