Bug List: (17 of 74)
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Bug 2038403 - SSH login fails with "client_loop: send disconnect: Broken pipe"
Summary: SSH login fails with "client_loop: send disconnect: Broken pipe"
Keywords:
Status: CLOSED NOTABUG
Alias: None
Product: Red Hat Enterprise Linux 9
Classification: Red Hat
Component: openssh
Version: CentOS Stream
Hardware: Unspecified
OS: Unspecified
low
low
Target Milestone: rc
: ---
Assignee: Dmitry Belyavskiy
QA Contact: Marek Havrila
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2022-01-07 20:28 UTC by Neal Gompa
Modified: 2022-05-31 13:18 UTC (History)
12 users (show)

Fixed In Version:
Doc Type: If docs needed, set a value
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Clone Of:
Environment:
Last Closed: 2022-05-31 13:15:47 UTC
Type: Bug
Target Upstream Version:
Embargoed:

Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Github OSInside kiwi pull 2046 0 None Merged Ensure SELinux labels are set based on the policy 2022-01-25 22:49:49 UTC
Red Hat Issue Tracker CRYPTO-7417 0 None None None 2022-05-31 13:18:16 UTC
Red Hat Issue Tracker RHELPLAN-107155 0 None None None 2022-01-07 20:33:16 UTC

Description Neal Gompa 2022-01-07 20:28:47 UTC 
Description of problem:
On my self-built cloud images, attempts to login to booted VMs fail with the error "client_loop: send disconnect: Broken pipe".

This last worked on an image I built on November 24, 2021. Images I've built this week have this problem. The compose "CentOS-Stream-9-20211222.0" is the compose where this problem is exhibited.

Version-Release number of selected component (if applicable):
8.7p1-5.el9

How reproducible:
Always

Steps to Reproduce:
1. git clone https://gitlab.com/Conan_Kudo/kiwi-cloud-imagebuild-test
2. sudo podman run --privileged --rm -it -v $PWD/kiwi-cloud-imagebuild-test:/code:z --workdir /code registry.fedoraproject.org:34 /bin/bash
3. dnf --assumeyes install kiwi-cli
4. ./kiwi-build --image-type=oem --image-profile=OpenStack --image-name=centos9 --output-dir $PWD/tmpoutput
5. Boot in OpenStack
6. Try to login to cloud-user (the cloud-init configured user)

Actual results:
SSH login fails with "client_loop: send disconnect: Broken pipe"

Expected results:
SSH login works.

Additional info:
I've got a sample image demonstrating this problem: https://ngompa.fedorapeople.org/centos/CentOS-9-Appliance.x86_64-0.0.0-20220106.qcow2
Comment 1 Jakub Jelen 2022-01-07 20:39:38 UTC 
Debug logs would be useful from both client and server.

Unfortunately, we can not support every rebuild. I can just confirm we have dozens tests that verify this particular use cases work with RHEL and CentOS builds we provide so this will most probably be some issue with the rebuild or with the infra.
Comment 2 Neal Gompa 2022-01-18 17:47:25 UTC 
(In reply to Jakub Jelen from comment #1)
> Debug logs would be useful from both client and server.
> 
> Unfortunately, we can not support every rebuild. I can just confirm we have
> dozens tests that verify this particular use cases work with RHEL and CentOS
> builds we provide so this will most probably be some issue with the rebuild
> or with the infra.

What would you like logs of? I'm still trying to figure out how to do a workaround login somehow to get logs...
Comment 3 Jakub Jelen 2022-01-24 13:34:51 UTC 
ssh client and sshd server one with LogLevel DEBUG3 in ssh_config and sshd_config.

You can probably access the VM through console to get the server logs, if you run it locally. Not sure about the OpenStack though ... but I believe there must be also some console access.
Comment 4 Neal Gompa 2022-01-25 22:49:50 UTC 
I figured out the issue. Apparently the SELinux policy wasn't being correctly applied, so "/var/run" was broken and sshd didn't work properly.

I fixed it in kiwi: https://github.com/OSInside/kiwi/pull/2046

You may want to make sure your image building tools are doing this properly too, as it was subtle and difficult to pin down.
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Bug List: (17 of 74)