environmental information

	operating system	Nexus edition	port
Old server	Centos7.7	V3.*	8081
New server	Centos7.9	V3.*	8081

Nexus It mainly consists of two parts , Installation directory and data directory ,nexus The migration only needs to copy two directories from the old server to the new server .

Migration operations

1. Copy the old environment file to the corresponding directory of the new environment

Old environment directory

The installation directory ：/opt/nexus3/

Data directory ：/opt/sonatype-work/nexus3/

New environment Directory

The installation directory ：/opt/nexus3/

Data directory ：/home/nexus-data/

modify < The installation directory >/bin/nexus.vmoptions file , Custom data directory

-Dkaraf.data=/home/nexus-data
-XX:LogFile=/home/nexus-data/log/jvm.log
-Djava.io.tmpdir=/home/nexus-data/tmp

2. establish nexus user （ password nexus）

$ useradd nexus

$ passwd nexus  

$ su - nexus 

3. start-up nexus application

$ /opt/nexus3/bin/nexus start

If you view the log in real time, you can use  run start-up

$ /opt/nexus3/bin/nexus run

4. Firewall settings （ A choice ）

1)  If you turn off the firewall ：

$ systemctl stop firewalld

2)  If open firewall

$ systemctl status firewalld # View firewall status

$ firewall-cmd --zone=public --list-ports # Check the port opening

$ firewall-cmd --zone=public --add-port=8081/tcp --permanent

$ firewall-cmd --reload # Refresh firewall settings

$ firewall-cmd --zone=public --list-ports

  Verify whether the service is started successfully in the browser http://<ip>:8081

5. To configure nexus service , And set the power on self starting

$ vi /usr/lib/systemd/system

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21

[Unit]Description=nexus After=network.target    [Service] Type=forking ExecStart=/opt/nexus3/bin/nexus start ExecStop=/opt/nexus3/bin/nexus stop User=nexus # start-up nexus Users of the process , You need to confirm whether the directory has access rights    [Install] WantedBy=multi-user.target # Command line mode

$ systemctl daemon-reload # Reload service profile

$ systemctl enable nexus # Set power on self start

$ systemctl start nexus 

$ systemctl status nexus 

Add ：

• How to find nexus Two file directories

1)  The installation directory

# whereis nexus

nexus:/opt/nexus3/bin/nexus /opt/nexus3/bin/nexus.rc /opt/nexus3/bin/nexus.vmoptions

/opt/nexus3/bin/nexus by nexus The executable of , Judge nexus Installed in the /opt/nexus3 Under the table of contents

2）  Data directory

# whereis nexus

nexus:/opt/nexus3/bin/nexus /opt/nexus3/bin/nexus.rc /opt/nexus3/bin/nexus.vmoptions

# cat /opt/nexus3/bin/nexus.vmoptions

.......

-Dkaraf.data=../sonatype-work/nexus3

.......

# cd /opt/nexus3/bin/nexus.vmoptions/sonatype-work/nexus3 

nexus3 Modify the port