如何使用 Packer Salt provisioner 创建 docker 镜像？

Question

如何使用 Packer Salt 配置器创建 docker 图像？

这是我的 packer.json 文件。我会在下方评论

{
  "builders": [
    {
      "type": "docker",
      "image": "enonic/docker-salt-masterless-ubuntu",
      "export_path": "cassandra.tar" // Not sure what this is doing?
    }
  ],
  "provisioners": [
    {
      "type": "file",
      "source": "/srv/salt/cassandra", // This is where the cassandra directory is on my host machine which is ubuntu
      "destination": "/srv/salt/cassandra" // This is where I expect the cassandra directory on my host machine gets copied to inside a docker container
    },
    {
      "type": "salt-masterless",
      "local_state_tree": "/srv/salt/cassandra",
      "custom_state": "/srv/salt/cassandra/init.sls",
      "disable_sudo": true
    }
  ]
}

sudo docker build packer.json

我得到以下错误

Build 'docker' errored: Failed to upload to '/srv/salt/cassandra' in container: Error response from daemon: lstat /var/lib/docker/aufs/mnt/0c6a422400a073624a66b00580a6b9e5551e82a06495c46b1f840b38ca55699d/srv/salt: no such file or directory
. exit status 1.

==> Some builds didn't complete successfully and had errors:
--> docker: Failed to upload to '/srv/salt/cassandra' in container: Error response from daemon: lstat /var/lib/docker/aufs/mnt/0c6a422400a073624a66b00580a6b9e5551e82a06495c46b1f840b38ca55699d/srv/salt: no such file or directory

如果我能得到一个简单的工作示例，说明如何从主机使用 salt state 文件并使用加壳器构建 docker 映像，那就太好了。我的 cassandra 状态文件与 https://github.com/salt-formulas/salt-formula-cassandra

相同

我的 top.sls 文件看起来像这样

base:
  'client*-es-*':
    - roles-elasticsearch
  'client*-cassandra-*':
    - roles-cassandra


  'P@os:(Debian|Ubuntu) and P@roles:(elasticsearch|cassandra)':
    - match: compound
    - deb-common

  'roles:elasticsearch':
    - match: grain
    - disk-raid0-3volumes
    - disk-elasticsearch
    - elasticsearch
    - elasticsearch.cerebro
  'roles:cassandra':
    - match: grain
    - disk-raid0-3volumes
    - disk-cassandra
    - cassandra

我只想为 cassandra 构建一个 docker 容器镜像，而不是为我的 top.sls 中的所有内容构建一个容器镜像。那我该怎么做呢？

Answer 1

我将您的示例调整得更简单，只需安装 Apache 2。

shell provisioner 只是因为我不懂 salt 也没有花时间研究如何做 apt-get update。

首先，基础镜像已经安装了 salt，所以使用 skip_bootstrap。您不应将状态目录 上传到来宾（Docker 容器），因为这是自动完成的，所有这些都在文档Packer - Salt Masterless 中。 local_state_tree 应该指向盐州树 i.g 的底部。 /srv/salt 你的情况。

一个工作示例：

树

.
├── salt
│   ├── apache
│   │   └── init.sls
│   └── top.sls
└── template.json

Template.json

{
  "builders": [
    {
      "type": "docker",
      "image": "enonic/docker-salt-masterless-ubuntu",
      "export_path": "apache2.tar"
    }
  ],
  "provisioners": [
    {
      "type": "shell",
      "inline": [
        "apt-get update"
      ]
    },
    {
      "type": "salt-masterless",
      "local_state_tree": "salt",
      "skip_bootstrap": true,
      "disable_sudo": true
    }
  ]
}

top.sls

base:
  '*':
    - apache

apache/init.sls

apache2:
  pkg.installed: []
  service.running:
    - require:
      - pkg: apache2

Answer 2

您需要将 local_state_path 更改为 /srv/salt。

如何使用 Packer Salt provisioner 创建 docker 镜像？

How to use Packer Salt provisioner to create docker images?

salt-stack

packer