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Setup a Jenkins Server on CentOS 7

How to setup a Jenkins Server on CentOS 7

Get Jenkins packages#

# get packages$ yum install java-1.8.0-openjdk.x86_64$ wget -O /etc/yum.repos.d/jenkins.repo http://pkg.jenkins-ci.org/redhat-stable/jenkins.repo$ rpm --import http://pkg.jenkins-ci.org/redhat-stable/jenkins-ci.org.key

Install packages#

# install pkgs$ yum install -y jenkins docker vim git

Enable Firewall#

# fw rules$ firewall-cmd --zone=public --add-port=8080/tcp --permanent$ firewall-cmd --zone=public --add-service=http --permanent$ firewall-cmd --reload

Enable at Startup#

# start & enable$ systemctl start jenkins$ systemctl enable jenkins

Login to web UI#

$ http:// localhost or Ip address:8080

retrieve initial password#

$ grep -A 5 password /var/log/jenkins/jenkins.log

Git working with proxy#

git config --global http.proxy http://proxyuser:[email protected]:8080

Permissions for docker.sock#

needs sudo setup (build into playbook) then selinux 'chmod 777' basically (fix this to be secure)

[[email protected] run]# setfacl -m u::rwx,g::rwx,o::rwx docker.sock[[email protected] run]# getfacl docker.sock# file: docker.sock# owner: root# group: rootuser::rwxgroup::rwxother::rwx

Docker through Proxy (centos)#

if you get this error:

+ docker pull ruby:2.3.1Trying to pull repository docker.io/library/ruby ...Pulling repository docker.io/library/rubyNetwork timed out while trying to connect to https://index.docker.io/v1/repositories/library/ruby/images. You may want to check your internet connection or if you are behind a proxy.[Pipeline] }

Edit /etc/sysconfig/docker and add the following lines:

HTTP_PROXY='http://user:[email protected]:proxy-port'HTTPS_PROXY='http://user:[email protected]:proxy-port'

restart docker:

# systemctl restart docker

note: check 'setenforce' is set to 'permissive' (setenforce 0) so the docker.sock permissions dont get reverted on docker restart.

Docker image through a Proxy#

commands in your image need to go through a proxy too (figure out how to redirect ALL docker traffic to proxy)

stage("Install Bundler") {      sh "gem install -p http://proxy.darksyde.net:80 bundler --no-rdoc --no-ri"}

http://nknu.net/proxy-configuration-for-docker-on-centos-7/

Running Docker images#

need firewall rule: [[email protected] ~]# firewall-cmd --zone=public --add-port=4000/tcp --permanent

Publish Docker images to Private Registry#

bootstrap of jenkins build needs keys setup to talk to registry

References#