Ec2 Configure: Error: Cannot Find M4 Utility. Install M4 and Try Again.

Sonatype Nexus is one of the best open-source artifact management tools. It is some tool that you cannot avoid in your CI/CD pipeline. It effectively manages deployable artifacts.

Sonatype Nexus Arrangement Requirements

1. Minimum 1 VCPU & 2 GB Retentivity
2. Server firewall opened for port 22 & 8081
3. OpenJDK eight
4. All Nexus processes should run as a non-root nexus user.

Notation: For product setup, please consider minimum product hardware requirements based on the nexus usage and data storage. Bank check out the official arrangement requirements document for detailed information

Sonatype Nexus 3 on Linux ec2

This article guides yous to install and configure Sonatype Nexus 3 in a secure way on an ec2 Linux System.

Annotation: This was tested on a Redhat automobile and information technology will work on Centos or related Linux flavors as well.

Step 1: Login to your Linux server and update the yum packages. Also install required utilities.

          sudo yum update -y sudo yum install wget -y        

Footstep 2: Install OpenJDK one.viii

          sudo yum install java-1.8.0-openjdk.x86_64 -y        

Pace 3: Create a directory named app and cd into the directory.

          sudo mkdir /app && cd /app        

Step 4: Download the latest nexus. You can get the latest download links fo for nexus from here.

          sudo wget -O nexus.tar.gz https://download.sonatype.com/nexus/three/latest-unix.tar.gz        

Untar the downloaded file.

          sudo tar -xvf nexus.tar.gz        

Rename the untared file to nexus.

          sudo mv nexus-three* nexus        

Step 5: As a adept security practice, it is not advised to run nexus service with root privileges. So create a new user named nexus to run the nexus service.

          sudo adduser nexus        

Change the ownership of nexus files and nexus data directory to nexus user.

          sudo chown -R nexus:nexus /app/nexus sudo chown -R nexus:nexus /app/sonatype-piece of work        

Step 6: Open up /app/nexus/bin/nexus.rc file

          sudo vi  /app/nexus/bin/nexus.rc        

Uncomment run_as_user parameter and set information technology every bit following.

          run_as_user="nexus"        

Footstep vii: If you desire to change the default nexus information directory, open up the nexus properties file and change the data directory -Dkaraf.data parameter to a preferred location as shown below. If you lot don't specify anything, by default nexus data directory will be set up to /app/sonatype-piece of work/nexus3

Tip: For production setup, it is is always better to mountain the nexus data directory to a split data deejay attached to the server. So that backup and restore tin can be done easily.

          sudo half dozen /app/nexus/bin/nexus.vmoptions        

An example configuration is shown below.

          -Xms2703m -Xmx2703m -XX:MaxDirectMemorySize=2703m -Xx:+UnlockDiagnosticVMOptions -Xx:+UnsyncloadClass -Xx:+LogVMOutput -XX:LogFile=../sonatype-work/nexus3/log/jvm.log -Xx:-OmitStackTraceInFastThrow -Djava.net.preferIPv4Stack=truthful -Dkaraf.abode=. -Dkaraf.base of operations=. -Dkaraf.etc=etc/karaf -Djava.util.logging.config.file=etc/karaf/coffee.util.logging.properties -Dkaraf.data=/nexus/nexus-data -Djava.io.tmpdir=../sonatype-work/nexus3/tmp -Dkaraf.startLocalConsole=simulated        

Running Nexus every bit a System Service

It is better to have systemd entry to manage nexus using systemctl. Follow the steps given below for adding nexus as a systemd service.

Create a nexus systemd unit file.

          sudo vi /etc/systemd/organization/nexus.service        

Add the post-obit contents to the unit of measurement file.

          [Unit] Description=nexus service After=network.target  [Service] Type=forking LimitNOFILE=65536 User=nexus Grouping=nexus ExecStart=/app/nexus/bin/nexus start ExecStop=/app/nexus/bin/nexus finish User=nexus Restart=on-abort  [Install] WantedBy=multi-user.target        

Manage Nexus Service

At present we have all the configurations in place to run nexus.

Execute the following command to add nexus service to boot.

          sudo chkconfig nexus on        

To get-go the Nexus service, use the post-obit command. If you are having trouble starting nexus, please check the troubleshooting section below.

          sudo systemctl start nexus        

The above command will start the nexus service on port 8081. To admission the nexus dashboard, visit http://:8081. You will be able to see the nexus homepage as shown beneath.

To log in, use the default username and password.

Default username is admin

You lot can find the default admin password in /app/sonatype-work/nexus3/admin.password file. The path will exist shown in the login screen every bit prove beneath.

          cat /app/sonatype-work/nexus3/admin.password        

Once you lot login, you volition be prompted to reset the password.

For stopping nexus, execute

          sudo systemctl stop nexus        

For restarting nexus,

          sudo systemctl restart nexus        

Sonatype Nexus non Starting [Troubleshooting]

Sometimes, if the server is enabled with SELINUX, you lot might get the following error. (Usually on Centos Servers)

          Chore for nexus.service failed considering the control process exited with mistake code. Come across "systemctl status nexus.service" and "journalctl -xe" for details.        

Execute the following command and see the actual error.

          journalctl -xe        

Check the output for the following SELINUX issue.

          SELinux is preventing /usr/lib/systemd/systemd from execute access on the file nexus.        

To rectify this outcome, add together a SELinux policy to allow Systemd to admission the nexus binary in path /app/nexus/bin/nexus using the following control.

          sudo chcon -R -t bin_t /app/nexus/bin/nexus        

Now, first the Nexus server again.

          sudo systemctl start nexus        

You Might Like

How to cheque the Nexus version in Linux?

Yous can find the Nexus version from the Dashboard. Besides, if you desire to detect the version from the Linux command line, execute the following control.
curl --include --silent http://localhost:8081/ | grep Server

How to start Nexus in Linux?

Nexus binary comes equally an executable. You tin utilize the binary path to kickoff nexus. For background execution, you tin create a systemd file with nexus configurations.

smithhartur.blogspot.com

Source: https://devopscube.com/how-to-install-latest-sonatype-nexus-3-on-linux/

Share this post