Tuesday, October 1, 2019

How to setup SonaType Nexus 3 on Linux in EC2? Nexus installation on RedHat Linux | Install Nexus on RedHat Linux

Nexus is an open source, Java based binary repository manager, used for storing build artifacts. We will eventually integrate Nexus with Jenkins for uploading WAR/EAR/JAR files.

Here are the steps for installing Sonatype Nexus 3 in RHEL in EC2 on AWS. Please create a new Redhat EC2 instance with small type. Choose Redhat Enterprise 8.

Pre-requisites:
Make sure you open port 8081 in AWS security group

Installation Steps:

sudo yum install wget -y






Download Java 8
sudo yum install java-1.8.0-openjdk.x86_64 -y

you can confirm java is installed by typing the below command:
java -version

Execute the below command to navigate to /opt directory by changing directory:

cd /opt

Download Nexus Latest version

sudo wget -O nexus3.tar.gz https://download.sonatype.com/nexus/3/latest-unix.tar.gz

Extract Nexus
sudo tar -xvf nexus3.tar.gz
sudo mv nexus-3* nexus

Create a user called Nexus
sudo adduser nexus

Change the ownership of nexus files and nexus data directory to nexus user.
sudo chown -R nexus:nexus /opt/nexus
sudo chown -R nexus:nexus /opt/sonatype-work


Add Nexus as a user
sudo vi /opt/nexus/bin/nexus.rc
change as per above screenshot by removing # and adding nexus 
 
 
 
 

Modify memory settings in Nexus configuration file

sudo vi /opt/nexus/bin/nexus.vmoptions

Modify the above file as shown in below:

-Xms512m
-Xmx512m
-XX:MaxDirectMemorySize=512m
after making changes, press wq! to come out of the file.

Configure Nexus to run as a service

sudo vi /etc/systemd/system/nexus.service
Copy the below content highlighted in green color.

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


Create a link to Nexus
sudo ln -s /opt/nexus/bin/nexus /etc/init.d/nexus

Execute the following command to add nexus service to boot.

sudo chkconfig --add nexus
sudo chkconfig --levels 345 nexus on


Start Nexus
sudo service nexus start







Check whether Nexus service is running
sudo service nexus status


Check the logs to see if Nexus is running
tail -f /opt/sonatype-work/nexus3/log/nexus.log

You will see Nexus started..If you Nexus stopped, review the steps above. 
Now press Ctrl C to come out of this windows.

Once Nexus is successfully installed, you can access it in the browser by URL - http://public_dns_name:8081

Click on Sign in link
user name is admin and password can be found by executing below command:

sudo cat /opt/sonatype-work/nexus3/admin.password




Copy the password and click sign in.
Now setup admin password as admin123


You should see the home page of Nexus:



Please follow steps for integrating Nexus with Jenkins


Please watch my YouTube channel on demo on How to setup Nexus 3 on Red Hat Linux in AWS:


7 comments:

  1. hi.. this was useful.. i followed the same steps mentioned above.. Except the version of nexus as the one mentioned is unavailable.. the nexus simply wont start.. there is no log too to verify.. i am trying to get the nexus repo for a POC work i am doing.. Please help

    ReplyDelete
    Replies
    1. tail -f /opt/sonatype-work/nexus3/log/nexus.log
      This is how you check the logs

      Delete
  2. Hi, I have updated the version lately..Please try again now..

    ReplyDelete
  3. what should be the target groups for the LB application

    ReplyDelete
  4. I did the all steps and stack on:
    sudo chkconfig --add nexus
    error reading information on service nexus: No such file or directory

    and: curl localhost:8081
    curl: (7) Failed to connect to localhost port 8081: Connection refused


    can you help with that thank you

    ReplyDelete
  5. followed the same steps but service is stopping automatically not able access it.

    ReplyDelete

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