I am using Jenkins (2.32.2) Docker container with the Publish over ssh plugin (1.17) and I have added a new server manually.
The newly added server is another Docker container (both running with docker-compose) and I am using a password to connect to it, and everything works just fine when doing it manually, but the problem is when I'm rebuilding the image.
I am already using a volume for the jenkins gone directory and it works just fine. The problem is only on the initial installation (e.g. image build, not a container restart).
It seems like the problem is with the secret key, and I found out that I also need to copy some keys when creating my image.
See the credentials section at Publish over ssh documentation
I tried to copy all the "secrets" directory and the following files: secret.key, secret.key.not-so-secret, identity.key.enc - but I still can't connect after a fresh install.
What am I missing?
Edited:
I just tried to copy the whole jenkins_home directory on my DOCKERFILE and it works, so I guess that the problem is with the first load or something? maybe Jenkins changes the key / salt on the first load?
Thanks.
try to push out jenkins config to docker host of to os where docker host is being installed
docker run --name myjenkins -p 8080:8080 -p 50000:50000 -v /var/jenkins_home jenkins
or
docker run --name myjenkins -p 8080:8080 -p 50000:50000 -v ./local/conf:/var/jenkins_home jenkins
Related
I am trying a basic docker test in GCP compute instance. I pulled a tomcat image from the official repo. then ran a command to run the container. Command is :
docker run -te --rm -d -p 80:8080 tomcat
It created a container for me with below id.
3f8ce49393c708f4be4d3d5c956436e000eee6ba7ba08cba48ddf37786104a37
If I do docker ps, I get below
docker run -te --rm -d -p 80:8080 tomcat
3f8ce49393c708f4be4d3d5c956436e000eee6ba7ba08cba48ddf37786104a37
However the tomcat admin console does not open. The reason is tomcat image is trying to create the config files under /usr/local. However, it is a read only file system. So the config files are not created.
Is there a way to ask Docker to create the files in a different location? Or, is there any other way to handle it?
Thanks in advance.
I know my issue is already discussed in How to run shell script on host from docker container? but i think my issue is a littel bit more complicated.
At first I try to explain my situation. I'm using jenkins 2.x from a docker container in CentOS VM (Host). In jenkins i created a Job which checks out 3 files from SVN (2 Shell scripts and 1 .jar file). these files will be downloaded in jenkins workspace in jenkins docker container and also on host in a mounted directory like that:
volumes:
- ${DATA_HOME}/jenkins/data:/var/jenkins_home
One of these scripts will be executed from jenkins job and that executes the other script. The second script checks out a SVN directory and does much more stuffs.
So I want a new mounted volume in that directory all results of executed second script will be placed on Host. I think to connect to the host over 'SSH' and execute the script seems to be fine but how can i do that.
I hope I could explain my issue understandable
I will answer regarding "I think to connect to the host over 'SSH' and execute the script seems to be fine but how can i do that"
Pass Host machine Ip to your run command.
docker run --name redis --env pass=pass_my --add-host="hostmachine:192.168.1.23" -dit redis
Now,
docker exec -it redis ash
and run this command. This will do SSH from the container to host
ssh user_name#hostmachine 'ls; bash /home/user_name/Desktop/test.sh; docker run --name db -dit db; docker ps'
If you want something without password then set ssh-key in a container or you can also try
sshpass -p $pass ssh user_name#hostmachine 'ls;/home/user_name/Desktop/test.sh; docker run --name db -d
it db; docker ps'
or if you want to run the script that is inside container you can also do that just pass the script to ssh.
sshpass -p $pass ssh user_name#hostmachine < ./ab.sh
Note: $pass is password of host from ENV and hostmachine is host the we set during run command.
Based on comments in ans:
We can simply install any SSH plugin (SSH) or (Publish over SSH) and
it will work after providing username/password.
Only thing to watch out is that host name resolution does not work and we will need to provide an IP address.
As pointed out this is not the best approach, but sometimes in migration from older systems, we need to move one step at a time and this is the easiest step to take.
I am using jenkinssci/docker to setup some build automation on a server for a laravel project.
Using the command docker run -p 8080:8080 -p 50000:50000 -v jenkins_home:/var/jenkins_home jenkins/jenkins:lts, everything boots up fine, i create the admin login, create the project and link all of that together.
Yesterday i downloaded libraries to the container that this command gave me in docker using docker exec -u 0 -it <container_name_or_id> /bin/bash to get into the container as root to install things like php, composer, noodejs/npm. After this was done, i built the project and got a successful build.
Today I start the docker container using the same above command, build the project and build fails. The container no longer has any of the downloaded libraries (php, composer, node).
It is my understanding that including jenkins_home:/var/jenkins_home in the command to start the docker container, data would persist. This is wrong?
So my question is, how can i make it so that i can keep these libraries in the docker container that it builds?
I just started learning about these tools yesterday, so i'm not entirely sure I am even doing it the best. All i need is to be able to log into the server for Jenkins and build the project/ship the code to our staging/live servers.
side note: I am not currently using a Dockerfile. as mentioned here I am able to download tools in the container as root.
Your understanding is correct: you should use a persistent volume, otherwise you will lose your data every time the container is recreated.
I understand that you are running the container in a single machine with docker. You need to put a full path or relative path on the local folder of the volume definition to be sure that data persists, try with:
docker run -p 8080:8080 -p 50000:50000 -v ./jenkins_home:/var/jenkins_home jenkins/jenkins:lts
Look at the ./ on the local folder
Here my docker-compose.yml I'm using for a long time
version: '2'
services:
jenkins:
image: jenkins/jenkins:lts
volumes:
- ./jenkins:/var/jenkins_home
ports:
- 80:8080
- 50000:50000
Is basically the same but in yaml format
I am trying to integrate docker into my CI platform. After getting this working properly with a Docker-in-a-docker solution, I came across a blog post by one of the Docker maintainers, where he says that instead of using a Docker-in-a-docker solution for my CI, I should instead simply mount the /var/run/docker.sock to my CI container.
https://jpetazzo.github.io/2015/09/03/do-not-use-docker-in-docker-for-ci/
Simply put, when you start your CI container (Jenkins or other), instead of hacking something together with Docker-in-Docker, start it with:
docker run -v /var/run/docker.sock:/var/run/docker.sock ...
So I tried this. I ran the following command:
docker run -p 8080:8080 -p 50000:50000 -v /var/run/docker.sock:/var/run/docker.sock jenkins
Using jenkins as my CI container.
When running the above command, jenkins starts up properly, and I can jump into the container to see that the docker.sock file is located in the /var/run/ path.
However, when I run the command: docker, the machine returns with the following message:
bash: docker: command not found
Does anyone know what I am missing in order to make this work per the author's instructions?
I am using Docker v. 1.11.1, on a fresh CentOS 7 box.
Thanks in advance
Figured this out today. The above command will work so long as the docker daemon + dependencies are added to the container. In my case, I ended up writing a simple Dockerfile, which also included the line:
RUN curl -sSL https://get.docker.com/ | sh
This installed Docker on the container, and when I ran docker images from within the container, I could see all of the images from my host machine. I am now able to use all of the docker commands from within the container.
In Docker i have installed Jenkins successfully. When i create a new job and i would like to execute a sh file from my workspace, what is the best way to add a file to my workspace with Docker? I started my container with this: docker run --name myjenkins -p 8080:8080 -p 50000:50000 -v /var/jenkins_home jenkins
You could copy a file from your file system to the container with a simple command from your terminal.
docker cp [OPTIONS] LOCALPATH|- CONTAINER:PATH
https://docs.docker.com/engine/reference/commandline/cp/
example:
docker cp /yourpaht/yourfile <containerId>:/var/jenkins_home
It depends a bit on how the planned lifecycle of your Jenkins container is. If it is just used temporarily and does no harm if the data is gone, docker cp as NickGnd suggested will do the trick.
But since the working data of Jenkins like jobconfigs, system configs and workspaces will only live inside the container, all of it will be gone once the container is removed, so if you plan to have a longer running Jenkins environment, you might want to persist the data outside of the container so it will survive recreating the container, launching new container versions and so on. This can be done with the option --volume /path/on/host:/path/in/container or its short form -v on docker run.
There is also the option of --volumes-from which you can use to mount to keep the data in one "data container" and mount it into your Jenkins container.
For further information on this, please have a look at The docker volumes documentation