第 8 章 使用 RHEL for Edge Simplified Installer 镜像的 Ignition 工具

流程

1. 创建一个 Butane Config 文件，并将它保存为 .bu 格式。对于 RHEL for Edge 镜像，您必须将 variant 条目指定为 r4e，将 version 条目指定为 1.0.0。版本 1.0.0 上的 butane r4e 变体以 Ignition spec 版本 3.3.0 为目标。以下是 Butane Config YAML 文件的一个示例：

   variant: r4e
   version: 1.0.0
   ignition:
     config:
       merge:
         - source: http://192.168.122.1:8000/sample.ign
   passwd:
     users:
       - name: core
         groups:
           - wheel
         password_hash: password_hash_here
         ssh_authorized_keys:
           - ssh-ed25519 some-ssh-key-here
   storage:
     files:
       - path: /etc/NetworkManager/system-connections/enp1s0.nmconnection
         contents:
           inline: |
             [connection]
             id=enp1s0
             type=ethernet
             interface-name=enp1s0
             [ipv4]
             address1=192.168.122.42/24,192.168.122.1
             dns=8.8.8.8;
             dns-search=
             may-fail=false
             method=manual
         mode: 0600
       - path: /usr/local/bin/startup.sh
         contents:
           inline: |
             #!/bin/bash
             echo "Hello, World!"
         mode: 0755
   systemd:
     units:
       - name: hello.service
         contents: |
           [Unit]
           Description=A hello world
           [Install]
           WantedBy=multi-user.target
         enabled: true
       - name: fdo-client-linuxapp.service
         dropins:
           - name: log_trace.conf
             contents: |
               [Service]
               Environment=LOG_LEVEL=trace

2. 运行以下命令以使用 Butane Config YAML 文件，并生成一个 JSON 格式的 Ignition 配置：

   $ ./path/butane example.bu
   {"ignition":{"config":{"merge":[{"source":"http://192.168.122.1:8000/sample.ign"}]},"timeouts":{"httpTotal":30},"version":"3.3.0"},"passwd":{"users":[{"groups":["wheel"],"name":"core","passwordHash":"password_hash_here","sshAuthorizedKeys":["ssh-ed25519 some-ssh-key-here"]}]},"storage":{"files":[{"path":"/etc/NetworkManager/system-connections/enp1s0.nmconnection","contents":{"compression":"gzip","source":"data:;base64,H4sIAAAAAAAC/0yKUcrCMBAG3/csf/ObUKQie5LShyX5SgPNNiSr0NuLgiDzNMPM8VBFtHzoQjkxtPp+ITsrGLahKYyyGtoqEYNKwfeZc32OC0lKDb179rfg/HVyPgQ3hv8w/v0WT0k7T+7D/S1Dh7S4MRU5h1XyzqvsHVRg25G4iD5kp1cAAAD//6Cvq2ihAAAA"},"mode":384},{"path":"/usr/local/bin/startup.sh","contents":{"source":"data:;base64,IyEvYmluL2Jhc2gKZWNobyAiSGVsbG8sIFdvcmxkISIK"},"mode":493}]},"systemd":{"units":[{"contents":"[Unit]\nDescription=A hello world\n[Install]\nWantedBy=multi-user.target","enabled":true,"name":"hello.service"},{"dropins":[{"contents":"[Service]\nEnvironment=LOG_LEVEL=trace\n","name":"log_trace.conf"}],"name":"fdo-client-linuxapp.service"}]}}

   运行 Butane Config YAML 文件以检查并生成 Ignition Config JSON 文件后，在使用不支持的字段时（如分区）时可能会收到警告。您可以修复这些字段并重新运行检查。