Docker deploys Nexus Maven private library

Docker deploys Nexus Maven private library

Environment:

Operating system: Linux Centos8
docker version: 20.10.23
docker image:

REPOSITORY TAG IMAGE ID CREATED SIZE
sonatype/nexus3 latest 589f7296a4a2 22 months ago 655MB

Nexus official website: https://www.sonatype.com/nexus-repository-oss

Effect

Steps

1. Pull the image

Command:

docker pull docker.io/sonatype/nexus3

Output:

Using default tag: latest
latest: Pulling from sonatype/nexus3
26f1167feaf7: Pull complete
adffa6963146: Pull complete
e88dfbe0ef6a: Pull complete
0d43c5e95446: Pull complete
8ff7b45a7e29: Pull complete
Digest: sha256:eff4fb12346ceb5cd424732ee9f2765c0db0f8d5032cdb2f7f7e17acc349f651
Status: Downloaded newer image for sonatype/nexus3:latest
docker.io/sonatype/nexus3:latest

Check the image to make sure the image is successfully pulled:

# View image command
docker images
# Output results
REPOSITORY TAG IMAGE ID CREATED SIZE
sonatype/nexus3 latest 589f7296a4a2 22 months ago 655MB
...

2. Create a hanging directory

# Create a hanging directory
mkdir -p /SystemUtils/Data/Nexus3/nexus-data
# Set permissions for the newly created directory so that the docker container has permission to access it.
sudo chmod 777 /SystemUtils/Data/Nexus3/nexus-data

3. Run the container

Run the container:

docker run -id --name nexus \
-p 8000:8081 \
-e NEXUS_CONTEXT=nexus \
-v /SystemUtils/Data/Nexus3/nexus-data:/nexus-data \
docker.io/sonatype/nexus3

Command analysis:

Command	Description
docker run	Container run command
-id	Indicates running in the background
–name nexus	Specify the container name, here The name is nexus
-p 8000:8081	The host port and the container port are mapped, here The host port is 8000 and the container port is 8081
-e NEXUS_CONTEXT=nexus	is an environment variable, Usually used to set the Nexus context path when starting the Nexus service. This environment variable can be used to specify the root path of the Nexus service when it is running, such as http://localhost:8081/nexus.
-v /SystemUtils/Data/Nexus3/nexus-data:/nexus-data	Change the container The directory is hung on the host machine
docker.io/sonatype/nexus3	Mirror name, indicating the running Which image is it?
Check whether the container runs successfully:

# View currently running containers
docker ps
# Output results
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
92d88dd2a1dd sonatype/nexus3 "sh -c ${SONATYPE_DI…" 2 hours ago Up 2 hours 0.0.0.0:8000->8081/tcp, :::8000->8081/tcp

If the query is not found here, the operation failed.
At this time, check the log analysis error command: docker logs -f [container id/container name]

docker logs -f 92d88dd2a1dd

Then analyze the problem and solve it based on the log results.
I encountered the following error here

mkdir: cannot create directory '../sonatype-work/nexus3/log': Permission denied
mkdir: cannot create directory '../sonatype-work/nexus3/tmp': Permission denied
OpenJDK 64-Bit Server VM warning: Cannot open file ../sonatype-work/nexus3/log/jvm.log due to No such file or directory

Warning: Cannot open log file: ../sonatype-work/nexus3/log/jvm.log
Warning: Forcing option -XX:LogFile=/tmp/jvm.log
java.io.FileNotFoundException: ../sonatype-work/nexus3/tmp/i4j_ZTDnGON8hezynsMX2ZCYAVDtQog=.lock (No such file or directory)
        at java.io.RandomAccessFile.open0(Native Method)
        at java.io.RandomAccessFile.open(RandomAccessFile.java:316)
        at java.io.RandomAccessFile.<init>(RandomAccessFile.java:243)
        at com.install4j.runtime.launcher.util.SingleInstance.check(SingleInstance.java:72)
        at com.install4j.runtime.launcher.util.SingleInstance.checkForCurrentLauncher(SingleInstance.java:31)
        at com.install4j.runtime.launcher.UnixLauncher.checkSingleInstance(UnixLauncher.java:88)
        at com.install4j.runtime.launcher.UnixLauncher.main(UnixLauncher.java:67)
java.io.FileNotFoundException: /nexus-data/karaf.pid (Permission denied)
        at java.io.FileOutputStream.open0(Native Method)
        at java.io.FileOutputStream.open(FileOutputStream.java:270)
        at java.io.FileOutputStream.<init>(FileOutputStream.java:213)
        at java.io.FileOutputStream.<init>(FileOutputStream.java:101)
        at org.apache.karaf.main.InstanceHelper.writePid(InstanceHelper.java:126)
        at org.apache.karaf.main.Main.launch(Main.java:271)
        at org.sonatype.nexus.karaf.NexusMain.launch(NexusMain.java:113)
        at org.sonatype.nexus.karaf.NexusMain.main(NexusMain.java:52)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:498)
        at com.exe4j.runtime.LauncherEngine.launch(LauncherEngine.java:85)
        at com.install4j.runtime.launcher.UnixLauncher.main(UnixLauncher.java:69)
java.lang.RuntimeException: /nexus-data/log/karaf.log (No such file or directory)
        at org.apache.karaf.main.util.BootstrapLogManager.getDefaultHandlerInternal(BootstrapLogManager.java:102)
        at org.apache.karaf.main.util.BootstrapLogManager.getDefaultHandlersInternal(BootstrapLogManager.java:137)
        at org.apache.karaf.main.util.BootstrapLogManager.getDefaultHandlers(BootstrapLogManager.java:70)
        at org.apache.karaf.main.util.BootstrapLogManager.configureLogger(BootstrapLogManager.java:75)
        at org.apache.karaf.main.Main.launch(Main.java:272)
        at org.sonatype.nexus.karaf.NexusMain.launch(NexusMain.java:113)
        at org.sonatype.nexus.karaf.NexusMain.main(NexusMain.java:52)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:498)
        at com.exe4j.runtime.LauncherEngine.launch(LauncherEngine.java:85)
        at com.install4j.runtime.launcher.UnixLauncher.main(UnixLauncher.java:69)
Caused by: java.io.FileNotFoundException: /nexus-data/log/karaf.log (No such file or directory)
        at java.io.FileOutputStream.open0(Native Method)
        at java.io.FileOutputStream.open(FileOutputStream.java:270)
        at java.io.FileOutputStream.<init>(FileOutputStream.java:213)
        at org.apache.karaf.main.util.BootstrapLogManager$SimpleFileHandler.open(BootstrapLogManager.java:193)
        at org.apache.karaf.main.util.BootstrapLogManager$SimpleFileHandler.<init>(BootstrapLogManager.java:182)
        at org.apache.karaf.main.util.BootstrapLogManager.getDefaultHandlerInternal(BootstrapLogManager.java:100)
        ... 12 more
Error creating bundle cache.
Unable to update instance pid: Unable to create directory /nexus-data/instances

Encountering this error means that the created container cannot write data to the hanging directory, so the authorization step in the second step is indispensable.

4. Access the warehouse console

Access address: http://IP of your deployment:Port of your deployment/nexus
What I deploy here is: http://192.168.2.190:8000/nexus
Enter the address into the browser address bar and press Enter to enter, as shown below

Click Sign in in the upper right corner to log in

The default user is: admin
The initial password needs to be checked inside the container, as follows:
Enter the container command: docker exec -it [container name/container id] /bin/bash

docker exec -it 92d88dd2a1dd /bin/bash

Enter the password storage directory

# Enter directory
cd /nexus-data/
# View directory contents
ls -l
# Output results
bash-4.4$ ls -l
total 32
-rw-r--r-- 1 nexus nexus 36 Nov 11 14:29 admin.password
drwxr-xr-x 3 nexus nexus 21 Nov 11 14:29 blobs
drwxr-xr-x 336 nexus nexus 8192 Nov 11 14:29 cache
drwxr-xr-x 6 nexus nexus 113 Nov 11 14:29 db
drwxr-xr-x 3 nexus nexus 19 Nov 11 14:29 elasticsearch
drwxr-xr-x 3 nexus nexus 45 Nov 11 14:29 etc
drwxr-xr-x 2 nexus nexus 6 Nov 11 14:29 generated-bundles
drwxr-xr-x 2 nexus nexus 33 Nov 11 14:25 instances
drwxr-xr-x 3 nexus nexus 19 Nov 11 14:25 javaprefs
-rw-r--r-- 1 nexus nexus 1 Nov 11 14:29 karaf.pid
drwxr-xr-x 3 nexus nexus 18 Nov 11 14:29 keystores
-rw-r--r-- 1 nexus nexus 14 Nov 11 14:29 lock
drwxr-xr-x 3 nexus nexus 112 Nov 11 14:29 log
drwxr-xr-x 2 nexus nexus 6 Nov 11 14:29 orient
-rw-r--r-- 1 nexus nexus 5 Nov 11 14:29 port
drwxr-xr-x 2 nexus nexus 6 Nov 11 14:29 restore-from-backup
drwxr-xr-x 7 nexus nexus 4096 Nov 11 14:29 tmp

View password

cat admin.password
# or
viadmin.password
# Remember to exit when using vi

It is over now. After obtaining the password, log in with the user name. After logging in, you will be prompted to update the password. Just follow the prompts to perform the grouping.