安裝jenkins

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#前置作業
yum install -y wget
systemctl stop firewalld
systemctl disable firewalld

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#安裝openjdk
yum install -y java-11-openjdk

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#設定jenkins的yum repo
wget -O /etc/yum.repos.d/jenkins.repo https://pkg.jenkins.io/redhat-stable/jenkins.repo
rpm --import https://pkg.jenkins.io/redhat-stable/jenkins.io.key


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#安裝jenkins
yum install -y jenkins


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#設定jenkins (以下步驟非必要，可以跳過)
4.jenkins預設是8080 port，可以利用以下設定檔去改變port
vi /etc/sysconfig/jenkins

加入以下設定可以預防發生Out of memory情況
JENKINS_JAVA_OPTIONS="-Djava.awt.headless=true -Xms1024m -Xmx1024m -XX:PermSize=128M -XX:PermSize=256M"

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#啟動jenkins
systemctl start jenkins
systemctl enable jenkins

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#最後打開網頁http://IP:8080/，一開始需要解鎖jenkins，密碼放在
cat /var/lib/jenkins/secrets/initialAdminPassword

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補充：
記得要校時，否則jenkins的schedule job可能會異常。

sudo apt-get update
sudo apt install openjdk-11-jdk -y

sudo wget -O /usr/share/keyrings/jenkins-keyring.asc https://pkg.jenkins.io/debian-stable/jenkins.io-2023.key
echo deb [signed-by=/usr/share/keyrings/jenkins-keyring.asc] https://pkg.jenkins.io/debian-stable binary/ | sudo tee /etc/apt/sources.list.d/jenkins.list > /dev/null

sudo apt-get update
sudo apt-get install -y jenkins

systemctl start jenkins
systemctl enable jenkins

sudo timedatectl set-timezone Asia/Taipei
sudo timedatectl set-ntp yes
sudo systemctl enable systemd-timesyncd
sudo systemctl restart systemd-timesyncd
sudo systemctl status systemd-timesyncd
sudo timedatectl