Tag: linux

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Enabling Docker service to listen on a port

By default the Docker service listens on a local socket. If you want to access the Docker service api remotely, you need to configure the service to listen on a port as well.

On Ubuntu 16.04, edit /lib/systemd/system/docker.service and change this line:

ExecStart=/usr/bin/dockerd -H fd://

to

ExecStart=/usr/bin/dockerd -H fd:// -H tcp://0.0.0.0:2376

Reload the systemd config:

sudo systemctl daemon-reload

and restart the service:

sudo systemctl restart docker.service

More info here.

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Setting up a local production Jira installation with MySQL

Download the Jira server install from here.

Follow the steps here to download and add the JDBC driver to your Jira server. Download and copy the mysql connector jar to

/opt/atlassian/jira/lib/

Chose the ‘set up myself’ option, and complete the form to point to your already installed MySQL db instance:

Configure your install properties:

On the next screen you’ll be prompted for your license key, or head over to the Atlassian site to purchase or create a trial key. When you enter your organization name (above) on the license site it will pick up your site id.

Create an admin user, continue and now you’re up and running!

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Troubleshooting User Data scripts when creating AWS EC2 instances

When an AWS EC2 User Data script fails, you’ll see something like this in /var/log/cloud-init.log in your instance:

2018-02-03 06:08:16,536 - util.py[DEBUG]: Failed running /var/lib/cloud/instance/scripts/part-001 [127]

Traceback (most recent call last):

  File "/usr/lib/python3/dist-packages/cloudinit/util.py", line 806, in runparts

    subp(prefix + [exe_path], capture=False)

  File "/usr/lib/python3/dist-packages/cloudinit/util.py", line 1847, in subp

    cmd=args)

cloudinit.util.ProcessExecutionError: Unexpected error while running command.

Command: ['/var/lib/cloud/instance/scripts/part-001']

Exit code: 127

Reason: -

Stdout: -

Stderr: -

2018-02-03 06:08:16,541 - cc_scripts_user.py[WARNING]: Failed to run module scripts-user (scripts in /var/lib/cloud/instance/scripts)

2018-02-03 06:08:16,541 - handlers.py[DEBUG]: finish: modules-final/config-scripts-user: FAIL: running config-scripts-user with frequency once-per-instance

It tells you something failed, but not what. The trouble seems that output from your user data script does not go to the cloud-init.log by default.

One of the answers in this post suggests to pipe your script commands and output to logger into a separate log file like this:

set -x
exec > >(tee /var/log/user-data.log|logger -t user-data ) 2>&1
echo BEGIN
date '+%Y-%m-%d %H:%M:%S'

Now running my script with a ‘apt-get update -y’ looks like:

+ echo BEGIN
BEGIN
+ date '+%Y-%m-%d %H:%M:%S'
2018-02-03 23:37:55
+ apt-get update -y
... output continues here

And further down, here’s my specific error I was looking for:

+ java -Xmx1024M -Xms1024M -jar minecraft_server.1.12.2.jar nogui

/var/lib/cloud/instance/scripts/part-001: line 11: java: command not found

My EC2 running the Ubuntu AMI does not have Java installed by default, so I need to install it with (adding to my User Data script):

apt-get install openjdk-8-jre-headless -y

… and now my script runs as expected.

 

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