Jenkins installation on Centos behind Nginx

Step-1: Setting up Timezone
[code lang=”bash”]
sudo timedatectl set-timezone Asia/Kolkata
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Step-2: Download and install tools
[code lang=”bash”]
sudo yum install -y policycoreutils-python wget git
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Step-3: Download Java
[code lang=”bash”]
sudo wget –no-cookies –no-check-certificate –header “Cookie: gpw_e24=http%3A%2F%2Fwww.oracle.com%2F; oraclelicense=accept-securebackup-cookie” “http://download.oracle.com/otn-pub/java/jdk/8u141-b15/336fa29ff2bb4ef291e347e091f7f4a7/jdk-8u141-linux-x64.rpm”
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Step-4: Install java
[code lang=”bash”]
sudo rpm -ivh jdk-8u141-linux-x64.rpm
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Step-5: Setting Java Environmental Variables
[code lang=”bash”]
sudo vi /etc/profile.d/java.sh
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[code lang=”bash” title=”Java Environmental Variables”]
#!/bin/sh
JAVA_HOME=/usr/java/jdk1.8.0_141
PATH=$PATH:$JAVA_HOME/bin
export JAVA_HOME PATH
export CLASSPATH=.
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Step-6: Executing and sourcing the env file
[code lang=”bash”]
sudo chmod +x /etc/profile.d/java.sh
source /etc/profile.d/java.sh
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Step-7: Download Jenkins
[code lang=”bash”]
sudo wget https://pkg.jenkins.io/redhat-stable/jenkins-2.60.3-1.1.noarch.rpm
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Step-8: Install Jenkins
[code lang=”bash”]
sudo rpm -ivh jenkins-2.60.3-1.1.noarch.rpm
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Step-9: Create JENKINS_HOME directory
[code lang=”bash”]
sudo mkdir /opt/mycicd
sudo chown -R jenkins:jenkins /opt/mycicd
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Step-10: Edit Jenkins Options file
[code lang=”bash”]
sudo vi /etc/sysconfig/jenkins
JENKINS_HOME=/opt/mycicd
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Step-11: Start Jenkins
[code lang=”bash”]
sudo systemctl start jenkins
sudo systemctl enable jenkins
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Step-12: Download Nginx
[code lang=”bash”]
sudo wget https://nginx.org/packages/rhel/7/x86_64/RPMS/nginx-1.12.1-1.el7.ngx.x86_64.rpm
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Step-13: Install nginx
[code lang=”bash”]
sudo rpm -ivh nginx-1.12.1-1.el7.ngx.x86_64.rpm
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Step-14: Starting Nginx
[code lang=”bash”]
sudo systemctl start nginx
sudo systemctl enable nginx
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Step-15: Nginx Jenkins Configuration
[code language=”lang=bash””]
sudo vi /etcnginx/conf.d/jenkins.conf
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[code lang=”bash” title=”Jenkins Reverse Proxy Conflicts”]
upstream app_server {
server 127.0.0.1:8080 fail_timeout=0;
}

server {
listen 80;
listen [::]:80 default ipv6only=on;
server_name jenkins.yebbare.com;

location / {
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
proxy_set_header Host $host;
proxy_redirect off;

if (!-f $request_filename) {
proxy_pass http://app_server;
break;
}
}
}
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Step-16: Reload Nginx Configuration
[code lang=”bash”]
sudo nginx -t
sudo nginx -s reload
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Step-17: Nginx SELinux Module for Jenkins reverse proxy
[code lang=”bash”]
sudo cat /var/log/audit/audit.log | grep -i nginx | grep -i denied | audit2allow -M skynginx
sudo semodule -i skynginx.pp
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