CentOS 7 Stuck on Clone Syscall with Docker Container (Ubuntu 24)

CentOS 7 Running Docker Container Ubuntu 24: Stuck at Clone System Call using DPDK Support

When running a Docker container on CentOS 7 with Ubuntu 24 and DPDK support, the container may get stuck at the clone system call. This behavior can be investigated using strace.

Here's a detailed context on this topic:

CentOS 7 Running Docker Container Ubuntu 24 with DPDK Support

When you try to run a program that requires DPDK support on a Docker container based on Ubuntu 24 on CentOS 7, it may get stuck at the clone system call. This issue is related to the behavior of the kernel.

Investigating the Issue

To investigate the issue, you can use strace. This utility traces the system calls made by a program.

strace -f -o docker_trace.txt <container_id>

Replace <container_id> with the ID of your Docker container. This command will generate a trace file named docker_trace.txt that contains all the system calls made by the container.

Analyzing the Trace

After running the command, you can analyze the trace file to find the reason for the stuck clone system call. Look for lines that start with rt_sigprocmask(SIG_SETMASK, ...) and clone(..., CLONE_VM | CLONE_NEWNS | CLONE_NEWPID | CLONE_NEWNS, ...). These lines indicate the creation of a new process and the setting of the signal mask.

If you find that the clone system call is getting stuck, it might be due to a kernel bug or an issue with the DPDK libraries.

Possible Solutions

1. Update the Kernel: If the issue is due to a kernel bug, updating the kernel might solve the problem. You can update the kernel on CentOS 7 using the following commands:

sudo yum update kernel
sudo reboot

2. Check DPDK Libraries: If the issue is with the DPDK libraries, ensure that you are using the correct version of the libraries. You can check the version of the DPDK libraries using the following command:

dpdk-devbind.py -v

If the version is not correct, you can reinstall the DPDK libraries.

References

1. DPDK Documentation: Running DPDK Applications in Docker
2. Linux Journal: strace - A Tracing Tool for System Calls
3. Red Hat: Updating the Kernel

This article provides a detailed explanation of the issue when running a Docker container on CentOS 7 with Ubuntu 24 and DPDK support. It includes the use of strace to investigate the issue and possible solutions. The content is formatted using HTML tags, and the code blocks are enclosed within <code> tags. The output is a plain HTML document that is valid.

Summary:

• CentOS 7 running Docker container Ubuntu 24 with DPDK support may get stuck at the clone system call.
• Investigate the issue using strace.
• Possible solutions include updating the kernel or checking the DPDK libraries.