未能在AmazonLinux2AMI和EC2上安装JDK 11

Question

我尝试使用以下Packer配置安装带有预安装Jenkins的EC2实例：

这里最重要的部分是setup.sh脚本，它安装Jenkins和Java

#!/bin/bash

echo "Installing Amazon Linux extras"
amazon-linux-extras install epel -y

echo "Install Jenkins stable release"
yum remove -y java
yum install -y java-11-openjdk-devel
wget -O /etc/yum.repos.d/jenkins.repo http://pkg.jenkins-ci.org/redhat-stable/jenkins.repo
rpm --import https://pkg.jenkins.io/redhat-stable/jenkins.io.key
yum install -y jenkins
chkconfig jenkins on

echo "Install git"
yum install -y git

echo "Setup SSH key"
mkdir /var/lib/jenkins/.ssh
touch /var/lib/jenkins/.ssh/known_hosts
chown -R jenkins:jenkins /var/lib/jenkins/.ssh
chmod 700 /var/lib/jenkins/.ssh
mv /tmp/id_rsa /var/lib/jenkins/.ssh/id_rsa
chmod 600 /var/lib/jenkins/.ssh/id_rsa
chown -R jenkins:jenkins /var/lib/jenkins/.ssh/id_rsa

echo "Configure Jenkins"
mkdir -p /var/lib/jenkins/init.groovy.d
mv /tmp/scripts/*.groovy /var/lib/jenkins/init.groovy.d/
chown -R jenkins:jenkins /var/lib/jenkins/init.groovy.d
mv /tmp/config/jenkins /etc/sysconfig/jenkins
chmod +x /tmp/config/install-plugins.sh
bash /tmp/config/install-plugins.sh
service jenkins start

通过以下链接查看所有其他配置文件：

https://github.com/mlabouardy/pipeline-as-code-with-jenkins/tree/master/chapter4/distributed/master

当我跑步时：

packer build template.json

我得到以下例外：

==> amazon-ebs: Job for jenkins.service failed because the control process exited with error code. See "systemctl status jenkins.service" and "journalctl -xe" for details.

如果我使用：：，那么一切都很完美。

yum install -y java-1.8.0-openjdk

而不是：

yum install -y java-11-openjdk-devel

我可以启动Jenkins，但我看到了以下警告：

Using Java 8 with the latest Jenkins is not recommended

有人知道如何使用Java 11来实现这种配置吗？

P.S.作为亚马逊机器图像的来源，我使用：

Amazon Linux 2 AMI (HVM), SSD Volume Type - ami-02e136e904f3da870 (64-bit x86) / ami-0e341fcaad89c3650 (64-bit Arm)

它可在“("source_ami”us-east-1“区域(us-east-1)中获得："ami-02e136e904f3da870”--AmazonLinux2AMI的确切id取决于该区域)。

下面是封隔器template.json，，用于从Source图像中烘焙Jenkins图像

{
    "variables" : {
        "region" : "us-east-1",
        "aws_profile": "ops-account",
        "source_ami" : "ami-02e136e904f3da870",
        "instance_type": "t2.micro",
        "ssh_key": "./jenkins_ssh"
    },
    "builders" : [
        {
            "type" : "amazon-ebs",
            "profile" : "{{user `aws_profile`}}",
            "region" : "{{user `region`}}",
            "instance_type" : "{{user `instance_type`}}",
            "source_ami" : "{{user `source_ami`}}",
            "ssh_username" : "ec2-user",
            "ami_name" : "jenkins-master-2.204.1",
            "ami_description" : "Amazon Linux Image with Jenkins Server",
            "run_tags" : {
                "Name" : "packer-builder"
            }
        }
    ],
    "provisioners" : [
        {
            "type" : "file",
            "source" : "./scripts",
            "destination" : "/tmp/"
        },
        {
            "type" : "file",
            "source" : "./config",
            "destination" : "/tmp/"
        },
        {
            "type" : "file",
            "source" : "{{user `ssh_key`}}",
            "destination" : "/tmp/id_rsa"
        },
        {
            "type" : "shell",
            "script" : "./setup.sh",
            "execute_command" : "sudo -E -S sh '{{ .Path }}'"
        }
    ]
}

Answer 1

在setup.sh中添加以下命令行解决了这个问题：

amazon-linux-extras install java-openjdk11 -y

看来，java-11-openjdk包是不可用的，在Amazon 2主存储库中安装。

但是它们现在是可用的，在Amazon 2附加存储库中。

Answer 2

大多数在EC2-用户中安装jenkins有问题的人。

Jenkins Redhat包要使用这个存储库，运行以下命令：

1. sudo wget -O /etc/yum.repos.d/jenkins.repo https://pkg.jenkins.io/redhat-stable/jenkins.repo
2. sudo rpm --import https://pkg.jenkins.io/redhat-stable/jenkins.io.key
3. yum install epel-release ( it will not work so use below command ) sudo amazon-linux-extras install epel
4. yum install java-11-openjdk-devel -y yum install java-11-openjdk-devel (它不能工作，所以请使用下面的命令)
5. yum search all "java"

之后：

yum install java-11-amazon-corretto.x86_64
java --version

在这里输入图像描述

在这里输入图像描述

1. yum install jenkins
2. systemctl start jenkins
3. systemctl enable jenkins

Answer 3

如果您在安装jdk 11之后启动jenkins时仍然面临错误？检查java版本的java -version。

如果它显示的是java1.8*默认情况下是amazon ec2，我们需要更改为指向jdk 11版本。试试下面的命令

选项--配置java ->选择2有两个程序提供'java‘。

选择命令

java-1.8.0-openjdk.x86_64 (/usr/lib/jvm/java-1.8.0-openjdk-1.8.0.342.b07-1.amzn2.0.1.x86_64/jre/bin/java) 2 *+ -11-openjdk.x86_64 (/usr/lib/jvm/java-11-openjdk-11.0.16.0.8-1.amzn2.0.1.x86_64/bin/java)

然后，java -version应该显示11个版本。现在安装jenkins并启动它应该不是问题。