Troubleshoot Podman - Administrator Guide - Cortex XSIAM - Cortex

Troubleshoot Podman - Administrator Guide - Cortex XSIAM - Cortex - Security Operations

Cortex XSIAM Documentation

Product

Cortex XSIAM

Creation date

2024-03-06

Last date published

2024-09-12

Category

Administrator Guide

Abstract

Troubleshoot process leak or installation issues for Podman.

Podman version 3.4.1 and lower has a known issue that dbus-daemon processes may leak when running in an environment containing the dbus-x11 OS package. The issue occurs when the dbus-x11 OS package is installed, for example when installing an X11 desktop environment like GNOME desktop on the host machine. If you experience this issue, you see a large number of dbus-daemon processes owned by the demisto OS user. To check if you are affected by the issue, run the following command:

ps -fe | grep demisto | grep dbus-daemon

To fix this issue:

Remove the dbus-x11 OS package and dependent packages by running the following command:
sudo yum remove dbus-x11
After removal you can kill the leaked dbus-daemon processes by running the following OS command:
pgrep -u demisto dbus-daemon | xargs sudo kill

When Podman fails to run with an “Invalid argument” error, such as:

ERRO[0000] running `/usr/bin/newuidmap 15936 0 1029 1 1 165536 65536 65537 200000 65536`: newuidmap: write to uid_map failed: Invalid argument
Error: cannot set up namespace using "/usr/bin/newuidmap": exit status 1

This can be caused by duplicate lines for Cortex XSIAM in /etc/subuid and /etc/subgid.

To fix this issue:

Check if the /etc/subuid file contains multiple lines that start with the Cortex XSIAM username (usually demisto). For example:
```
alice:100000:65536
demisto:165536:65536
demisto:200000:65536
splunk:331072:65536
```
If this is the case, edit the file as root, and remove the extra line(s) for Cortex XSIAM. The line you should keep is the one that ends with 200000:65536. Continuing with the above example, here is the end result:
```
alice:100000:65536
demisto:200000:65536
splunk:331072:65536
```
Repeat the above steps for the /etc/subgid file.

When encountering errors in Cortex XSIAM that are Podman related, such as:

failed to run "docker ps". stderr: [], err: [Timeout. Process killed (1400)
Timeout while waiting for pong response [error 'Read timed out (15s)
Error: error joining network namespace of container 06b8aec6eabe2e735128e3a72cb06c8ae2d97ade60a56ab555034442ea4e2a84: error retrieving network namespace at /tmp/podman-run-989/netns/cni-86dca01c-bd84-1aaf-85fb-72b659a8e42a: unknown FS magic on "/tmp/podman-run-993/netns/cni-86dca01c-bd84-1aaf-85fb-72b659a8e42a": 58465342

Verify that Podman is running properly and consider whether to delete Podman data directories.

Verify that Podman is running properly with the demisto OS user, by performing the following steps:
- Change the OS user to demisto by running the following command:
  sudo su - -s /bin/bash demisto
- Check that your system complies with the minimum requirements, and view general system information such as host architecture, CPU, OS, registries, container storage path, etc., by running the following command:
  podman info
- Check all active running containers, container names and IDs, by running the following command:
  podman ps
- Check that Podman is able to run a container, by running the following command:
  podman run --rm -t demisto/python3:3.10.4.29342 echo "podman is working"
If any of the Podman commands are not working, try running with the --log-level=debug to receive additional details as to why it is failing. For example:
podman -log-level=debug ps
podman --log-level=debug ps podman --log-level=debug run --rm -t demisto/python3:3.10.4.29342 echo "podman is working"
Reset the Podman Data Directories.
If the Podman commands in step 1 are failing, you should clean the Podman working directories. Sometimes Podman's data directories get corrupted (for example, as a result of insufficient disk space).
Note
This step removes all Podman images including any custom images you may have created.
1. Stop the engine by running the following command:
  sudo systemctl stop d1
2. Ensure that all Podman containers of the demisto user are stopped, by running the following command:
  ps -fe | grep demisto | grep 'podman run'
  If required, kill the running containers.
3. Delete the following directories (assuming the demisto OS user's home directory is at: /home/demisto)
  - sudo rm -rf /home/demisto/.cache/containers/
  - sudo rm -rf /home/demisto/.local/share/containers/
  - sudo rm -rf /tmp/podman-run-$(id -u demisto)
  - sudo rm -rf /tmp/containers-user-$(id -u demisto)
  - sudo rm -rf /tmp/tmp/run-$(id -u demisto)
  Note
  $(id -u demisto) is used to get the demisto user ID, which is part of the directory name. For example, /tmp/podman-run-993
  Not all the directories above may be present.
4. Start the engine by running the following command:
  sudo systemctl start d1
5. Verify that Podman is working properly with the demisto OS user by following step 1.

In some cases, if the Podman process crashes or is killed abruptly it can leave containers on disk. You might see errors such as error allocating lock for new container: allocation failed; exceeded num_lock when the maximum number of locks used to manage containers is exhausted due to the unused containers that remain.

Change to the demisto operating system user sudo su - -s /bin/bash demisto.
Run podman ps -a -f status=exited to check for unused containers.
Clean up the unused containers podman container cleanup --rm -a.
Note
When you run podman container cleanup --rm -a, you might see a message such as running or paused containers cannot be moved without force. The message can be safely ignored, as it only pertains to current running containers, which are not removed.
After cleanup, verify there are no remaining unused containers podman ps -a -f status=exited.

Script failed to run: Docker code runner got container error: [Docker code script is in inconsistent state, ... error: [exit status 126] stderr: [Error: OCI runtime error: crun: create keyring ...: Disk quota exceeded]

By default, Podman creates a keyring that is used by each container. The limit per user on the machine might be low and Podman can reach the limit when running more containers than the keyring limit. To check the keyring usage, run the sudo cat /proc/key-users operating system command.

The command returns the usage for each UID (to retrieve the demisto user UID, run id demisto ). The fourth column shows the number of keys used out of the total number available. For more information about keys, see Kernel Key Retention Service.

You can either increase the limit of max keyrings (increasing to 1000 is safe and reasonable) per user as specified by your Linux vendor documentation or you can disable keyring creation by Podman. We recommend disabling keyring creation, unless keyrings are used by Podman in other applications on the machine. To disable keyring creation by Podman, modify the containers.conf file and add the option keyring = false under the "[containers]" section. For more information, see the Containers Engine Configuration File.

If the procedure set out in the Verify Podman installation section above does not solve the Podman issue and you require assistance from Support, do the following:

Include the following files as part of the support case:
- /etc/containers/storage.conf
- /home/demisto/.config/containers/storage.conf
  If the file does not exist, indicate that there is no such file.
- /home/demisto/.config/containers/registries.conf
  If the file does not exist, indicate that there is no such file.
Include the output of the following commands as the demisto user.
Note
To change to the demisto OS user, run the following command:
sudo su - -s /bin/bash demisto
- podman info
- podman images
- podman --log-level=debug ps
- podman --log-level=debug run --rm -t demisto/python3:3.10.4.29342 echo "podman is working"

When installing a Cortex XSIAM engine on a RHEL system (version 8 or later), or when running an integration on such an engine, you get a permission error for a path under /run (for example /run/user/0 or /run/libpod).

In RHEL 9 only: Make sure the container-tools meta-package is installed, by running:
yum -y install container-tools
Run the following commands:
cp /etc/containers/storage.conf /home/demisto/.config/containers/storage.conf
chown demisto:demisto /home/demisto/.config/containers/storage.conf
chmod 600 /home/demisto/.config/containers/storage.conf
Edit /home/demisto/.config/containers/storage.conf.
- Under [storage], change runroot to some temporary directory that is accessible by user demisto.
  For example: runroot = "/tmp/podman-run-xsiam"
- Also under [storage], change graphroot (which is where container images are stored) to any location that is owned and accessible by user demisto. We recommend using this standard path:
  graphroot = "/home/demisto/.local/share/containers/storage"
- Under [storage.options.overlay], uncomment the following line (remove the # from the start):
  mount_program = "/usr/bin/fuse-overlayfs"
Save the file and run the following.
Note
You must switch to user demisto before running the "system migrate" (running it as root will have no effect).
su - demisto
podman system migrate
Also as user demisto, run the following to ensure the path changes were applied:
podman info | grep Root
You should see the correct runRoot and graphRoot settings.
Still as user demisto, verify the issue is resolved by running:
podman run hello-world
If the issue persists, purge Podman's database by running the following:
Note
The "system migrate" must be done by user demisto.
rm -rf /home/demisto/.local/share/containers/*
podman system migrate

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