Contents: Installation Problem creating docker file Problem starting Jenkins after initial container creation Problem with bad port on ssh connection General Timeout executing ssh commands ssh commands taking a long time

This page describes problems encountered using Fuego, and their solutions.

Note for Editors: please put each issue in it's own page section

Installation [edit section]

Problem creating docker file [edit section]

Make sure you are running on a 64-bit version of the Linux kernel on your host machine.

Problem starting Jenkins after initial container creation [edit section]

Doug Crawford reported a problem starting Jenkins in the container after his initial build.

$ sudo ./docker-create-container.sh
Created JTA container 6a420f901af7847f2afa3100d3fb3852b71bc65f92aecd13a9aefe0823d42b77
$ sudo ./docker-start-container.sh Starting JTA container
6a420f901af7847f2afa3100d3fb3852b71bc65f92aecd13a9aefe0823d42b77
[....] Starting Jenkins Continuous Integration Server: jenkinssu: System error  failed!
[ ok ] Starting OpenBSD Secure Shell server: sshd.
[ ok ] Starting network benchmark server.

The error string is jenkinssu: System error

Takuo Kogushi provides the following response:

I had the same issue. I did some search in the net and found it is not a problem of fuego itself. As far as I know there are two workarounds;

• 1) Rebuild and install libpam with --disable-audit option (in the container) or
• 2) Modify docker-create-container.sh to add --pid="host" option to docker create command

Here is a patch provided by Koguchi-san:

diff --git a/fuego-host-scripts/docker-create-container.sh b/fuego-host-scripts/docker-create-container.sh
index 2ea7961..24663d6 100755
--- a/fuego-host-scripts/docker-create-container.sh
+++ b/fuego-host-scripts/docker-create-container.sh
@@ -7,7 +7,7 @@ while [ -h "$SOURCE" ]; do # resolve $SOURCE until the file is no longer a symli  done  DIR="$( cd -P "$( dirname "$SOURCE" )" && pwd )"

-CONTAINER_ID=`sudo docker create -it -v $DIR/../userdata:/userdata --net="host" fuego`
+CONTAINER_ID=`sudo docker create -it -v $DIR/../userdata:/userdata --pid="host" --net="host" fuego`
 CONTAINER_ID_FILE="$DIR/../last_fuego_container.id"
 echo "Created Fuego container $CONTAINER_ID"
 echo $CONTAINER_ID > $DIR/../last_fuego_container.id

Actually I have not tried the first one and do not know if there is any side effects for the second. ---

This may be related to this docker bug: https://github.com/docker/docker/issues/5899

Problem with bad port on ssh connection [edit section]

ovgen.py doesn't parse SSH_PORT from:

• /home/jenkins/fuego/engine/scripts/overlays/base/base-board.fuegoclass because it is missing double quotes.

The symptom is the following: You see the following in the test log for some test you tried to run:

+++ sshpass -e ssh -o ServerAliveInterval=30 -o
StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null -o
ConnectTimeout=15 -p root@10.0.0.1 true
Bad port 'root@10.0.0.1'
+++ abort_job 'Cannot connect to 10.0.0.1 via ssh'
+++ set +

The error string here is "Bad port 'root@10.0.0.1'"

This occurs because the port is empty. It should have been passed to the ssh command after the '-p' command line option, but since it is empty, it uses the account-name@address combination as the argument.

The reason it is empty is that a bug in the base-board.fuegoclass is missing the double-quotes.

This is fixed in the tbird20d repository with the following commit:

• https://bitbucket.org/tbird20d/fuego-core/commits/abb2e7161ba66017a267c09897e5db4d938ab214

General [edit section]

Timeout executing ssh commands [edit section]

In some cases, the ssh command used by Fuego takes a very long time to connect. There is a timeout for the ssh commands, specified as 15 seconds in the cogent repository and 30 seconds in the tbird20d repository.

The timeout for ssh commands is specified in the file

• /home/jenkins/fuego/engine/scripts/overlays/base/base-params.fuegoclass

You can change ConnectTimeout to something longer by editing the file.

FIXTHIS - make ConnectTimeout for ssh connections a board-level test variable

ssh commands taking a long time [edit section]

Sometimes, even if the command does not time, the SSH operations on the target take a very long time for each operation.

The symptom is that when you are watching the console output for a test, the test stops at the point of each SSH connection to the target.

One cause of long ssh connection times can be that the target ssh server (sshd) is configured to do DNS lookups on each inbound connection.

To turn this off, on the target, edit the file:

• /etc/ssh/sshd_config and add the line:

UseDNS no

This line can be added anywhere in the file, but I recommend adding it right after the UsePrivilegeSeparation line (if that's there).