Installing Nexus on Linux (without container)
Download the Nexus archive and uncompress it into a target folder.
The application consists of two folders :
– nexus-3.XX.X
– sonatype-work
The first one contains the nexus application and the second contains the data (repository, blob, … elements and downloaded artifacts too).
Helpful commands
nexus start : run nexus in background
nexus run : run nexus in foreground
nexus stop : stop nexus
Good practices : run as nexus and not root
To to run Nexus with the root user but a dedicated user such as a nexus user.
To achieve that :
1) we create the user and add it in its group : sudo adduser nexus nexus
2) we edit the nexus-3.XXX/bin/nexus.rc file in this way : run_as_user="nexus"
3) we change the owners of the directories where nexus is installed to make nexus the proprietary and the group too : sudo chown -R nexus:nexus nexus-root-folder
4) (optional) Change the home directory of the nexus user in the nexus directory installation : sudo usermod -d /opt/nexus nexus
Run Nexus as a service without container
1) follow the good practice of the previous point : run as nexus and not root.
….
Run Nexus as a service with a Docker container
Here is for systemd/ubuntu.
1) Follow the good practice of the previous point : run as nexus and not root.
2) Run docker with :
– a (n)amed container to be able to reference it in the service scripts
– the nexus (u)ser
– an external port that suits to your need (here 8072)
– a policy that tries to (restart) it unless the container was stopped
– a named (v)olume that stores application data beyond a container launch
The volume declared by the nexus image (/nexus-data) is about the sonatype-work directory present in the classical package.
– the nexus3 image
docker run -d \ --name nexus \ -u nexus \ -p 8072:8081 \ --restart=unless-stopped \ -v nexus-data:/nexus-data \ sonatype/nexus3 |
3) Edit the nexus.rc in the container to specify nexus as user (see the above best practice)
4) Declare the service in your systemd
[Unit] Description=Nexus repository Requires=docker.service After=docker.service [Service] Restart=on-abort ExecStart=/usr/bin/docker start -a nexus ExecStop=/usr/bin/docker stop -t 2 nexus User=nexus [Install] WantedBy=default.target |
5) Enable the service : sudo systemctl enable nexus
6) Reload the systemd manager configuration : sudo systemctl daemon-reload