When I start nexus3 in a docker container I get the following error messages.
$ docker run --rm sonatype/nexus3:3.8.0
Warning: Cannot open log file: ../sonatype-work/nexus3/log/jvm.log
Warning: Forcing option -XX:LogFile=/tmp/jvm.log
Java HotSpot(TM) 64-Bit Server VM warning: Cannot open file ../sonatype-work/nexus3/log/jvm.log due to Permission denied
Unable to update instance pid: Unable to create directory /nexus-data/instances
/nexus-data/log/karaf.log (Permission denied)
Unable to update instance pid: Unable to create directory /nexus-data/instances
It indicates that there is a file permission issue. I am using Red Hat Enterprise Linux 7.5 as host machine and the most recent docker version.
On another machine (ubuntu) it works fine.
The issue occurs in the persistent volume (/nexus-data). However, I do not mount a specific volume and let docker use a anonymous one.
If I compare the volumes on both machines I can see the following permissions:
For Red Hat, where it is not working is belongs to root.
$ docker run --rm sonatype/nexus3:3.8.0 ls -l /nexus-data
total 0
drwxr-xr-x. 2 root root 6 Mar 1 00:07 etc
drwxr-xr-x. 2 root root 6 Mar 1 00:07 log
drwxr-xr-x. 2 root root 6 Mar 1 00:07 tmp
On ubuntu, where it is working it belongs to nexus. Nexus is also the default user in the container.
$ docker run --rm sonatype/nexus3:3.8.0 ls -l /nexus-data
total 12
drwxr-xr-x 2 nexus nexus 4096 Mar 1 00:07 etc
drwxr-xr-x 2 nexus nexus 4096 Mar 1 00:07 log
drwxr-xr-x 2 nexus nexus 4096 Mar 1 00:07 tmp
Changing the user with the options -u is not an option.
I could solve it by deleting all local docker images: docker image prune -a
Afterwards it downloaded the image again and it worked. This is strange because I also compared the fingerprints of the images and they were identical.
An example of docker-compose for Nexus :
version: "3"
services:
#Nexus
nexus:
image: sonatype/nexus3:3.39.0
expose:
- "8081"
- "8082"
- "8083"
ports:
# UI
- "8081:8081"
# repositories http
- "8082:8082"
- "8083:8083"
# repositories https
#- "8182:8182"
#- "8183:8183"
environment:
- VIRTUAL_PORT=8081
volumes:
- "./nexus/data/nexus-data:/nexus-data"
Setup the volume :
mkdir -p ./nexus/data/nexus-data
sudo chown -R 200 nexus/ # 200 because it's the UID of the nexus user inside the container
Start Nexus
sudo docker-compose up -d
hf
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