如何在 Docker compose 3 中设置 path.repo？

Question

我有以下 Docker-compose 3 文件：

version: '3'
services:
  elasticsearch:
    image: docker.elastic.co/elasticsearch/elasticsearch-oss:6.2.4
    container_name: elasticsearch
    ...
    ...
    volumes:
      - /path/to/elasticsearch:/usr/share/elasticsearch/data
      - /path/to/elasticsearch/backup:/opt/elasticsearch/backup
    ports:
      - 9200:9200
    networks:
      - elasticnetwork

所以，我已经将我的 path.repo 设置为 /path/to/elasticsearch/backup。但是，运行 curl http://127.0.0.1:9200/_nodes/?pretty 会导致没有 path.repo：

"settings" : {
        ...
        "path" : {
          "logs" : "/usr/share/elasticsearch/logs",
          "home" : "/usr/share/elasticsearch"
        },
        ...
      },

我期待"repo" : ["/opt/elasticsearch/backup"]在路上看到。

Answer 1

如文档中所述，您必须path.repo在elasticsearch.yml文件中设置。此文件位于/usr/share/elasticsearch/config/图像中的目录中。

因此，您的撰写文件应如下所示：

    version: '3'
    services:
      elasticsearch:
        image: docker.elastic.co/elasticsearch/elasticsearch-oss:6.2.4
        container_name: elasticsearch
        volumes:
          - elastic-data:/usr/share/elasticsearch/data
          - elastic-backup:/usr/share/elasticsearch/backup
          - ./elasticsearch/elasticsearch.yml:/usr/share/elasticsearch/config/elasticsearch.yml
        ports:
          - 9200:9200
        environment:
          discovery.type: single-node
    volumes:
      elastic-data:
      elastic-backup:

你elasticsearch.yml应该有这些：

    cluster.name: "docker-cluster"
    network.host: 0.0.0.0
    
    # minimum_master_nodes need to be explicitly set when bound on a public IP
    # # set to 1 to allow single node clusters
    # # Details: https://github.com/elastic/elasticsearch/pull/17288
    # discovery.zen.minimum_master_nodes: 1
    path.repo: ["/usr/share/elasticsearch/backup"]

启动容器后，我可以repo在http://127.0.0.1:9200/_nodes/?pretty响应中看到：

    "settings" : {
            "cluster" : {
              "name" : "docker-cluster"
            },
            "node" : {
              "name" : "3cUpSf-"
            },
            "path" : {
              "logs" : "/usr/share/elasticsearch/logs",
              "home" : "/usr/share/elasticsearch",
              "repo" : [
                "/usr/share/elasticsearch/backup"
              ]
            },

来自评论：

在此映像中创建了一个名为 elasticsearch 的用户，并且 Elasticsearch 二进制文件在该用户的上下文中运行，而不是 root 用户，因此该用户/opt对容器内的目录没有写权限，但它对/usr/share/elastisearch目录有足够的权限。这就是我在上面的例子中使用这个目录而不是/opt/目录的原因。

Answer 2

version: "3"
services:
  elasticsearch:
    image: elasticsearch:6.8.2
    environment:
      - 'path.repo=/opt/elasticsearch/backup'