elasticsearch - travis 上的 Elasticsearch docker 失败，文件夹访问被拒绝

Question

我在 travis 上使用 Elasticsearch docker 映像时遇到问题。

鉴于此docker-compose.yml文件：

version: '2'
services:
  elasticsearch:
    image: docker.elastic.co/elasticsearch/elasticsearch:6.4.2
    ports:
      - "9200:9200"
    environment:
      - "discovery.type=single-node"
      - "transport.host=127.0.0.1"
      - "xpack.security.enabled=false"
    volumes:
      - ./elasticsearch/data:/usr/share/elasticsearch/data
  kibana:
    image: docker.elastic.co/kibana/kibana:6.4.2
    ports:
      - "5601:5601"
    depends_on:
      - elasticsearch
    environment:
      - "ELASTICSEARCH_URL: http://elasticsearch:9200"

和以下.travis.yml文件：

before_install:
- docker-compose up -d
- docker-compose logs -f &
- wget -q --waitretry=1 --retry-connrefused -T 10 -O - http://127.0.0.1:9200
[...more stuff here...]

Elasticsearch 引擎无法启动，出现以下异常：

elasticsearch_1  | [2018-10-19T08:09:23,574][INFO ][o.e.n.Node               ] [] initializing ...
elasticsearch_1  | [2018-10-19T08:09:23,627][WARN ][o.e.b.ElasticsearchUncaughtExceptionHandler] [] uncaught exception in thread [main]
elasticsearch_1  | org.elasticsearch.bootstrap.StartupException: java.lang.IllegalStateException: Failed to create node environment
elasticsearch_1  |  at org.elasticsearch.bootstrap.Elasticsearch.init(Elasticsearch.java:140) ~[elasticsearch-6.4.2.jar:6.4.2]
elasticsearch_1  |  at org.elasticsearch.bootstrap.Elasticsearch.execute(Elasticsearch.java:127) ~[elasticsearch-6.4.2.jar:6.4.2]
elasticsearch_1  |  at org.elasticsearch.cli.EnvironmentAwareCommand.execute(EnvironmentAwareCommand.java:86) ~[elasticsearch-6.4.2.jar:6.4.2]
elasticsearch_1  |  at org.elasticsearch.cli.Command.mainWithoutErrorHandling(Command.java:124) ~[elasticsearch-cli-6.4.2.jar:6.4.2]
elasticsearch_1  |  at org.elasticsearch.cli.Command.main(Command.java:90) ~[elasticsearch-cli-6.4.2.jar:6.4.2]
elasticsearch_1  |  at org.elasticsearch.bootstrap.Elasticsearch.main(Elasticsearch.java:93) ~[elasticsearch-6.4.2.jar:6.4.2]
elasticsearch_1  |  at org.elasticsearch.bootstrap.Elasticsearch.main(Elasticsearch.java:86) ~[elasticsearch-6.4.2.jar:6.4.2]
elasticsearch_1  | Caused by: java.lang.IllegalStateException: Failed to create node environment
elasticsearch_1  |  at org.elasticsearch.node.Node.<init>(Node.java:277) ~[elasticsearch-6.4.2.jar:6.4.2]
elasticsearch_1  |  at org.elasticsearch.node.Node.<init>(Node.java:256) ~[elasticsearch-6.4.2.jar:6.4.2]
elasticsearch_1  |  at org.elasticsearch.bootstrap.Bootstrap$5.<init>(Bootstrap.java:213) ~[elasticsearch-6.4.2.jar:6.4.2]
elasticsearch_1  |  at org.elasticsearch.bootstrap.Bootstrap.setup(Bootstrap.java:213) ~[elasticsearch-6.4.2.jar:6.4.2]
elasticsearch_1  |  at org.elasticsearch.bootstrap.Bootstrap.init(Bootstrap.java:326) ~[elasticsearch-6.4.2.jar:6.4.2]
elasticsearch_1  |  at org.elasticsearch.bootstrap.Elasticsearch.init(Elasticsearch.java:136) ~[elasticsearch-6.4.2.jar:6.4.2]
elasticsearch_1  |  ... 6 more
elasticsearch_1  | Caused by: java.nio.file.AccessDeniedException: /usr/share/elasticsearch/data/nodes
elasticsearch_1  |  at sun.nio.fs.UnixException.translateToIOException(UnixException.java:90) ~[?:?]
elasticsearch_1  |  at sun.nio.fs.UnixException.rethrowAsIOException(UnixException.java:111) ~[?:?]
elasticsearch_1  |  at sun.nio.fs.UnixException.rethrowAsIOException(UnixException.java:116) ~[?:?]
elasticsearch_1  |  at sun.nio.fs.UnixFileSystemProvider.createDirectory(UnixFileSystemProvider.java:385) ~[?:?]
elasticsearch_1  |  at java.nio.file.Files.createDirectory(Files.java:682) ~[?:?]
elasticsearch_1  |  at java.nio.file.Files.createAndCheckIsDirectory(Files.java:789) ~[?:?]
elasticsearch_1  |  at java.nio.file.Files.createDirectories(Files.java:775) ~[?:?]
elasticsearch_1  |  at org.elasticsearch.env.NodeEnvironment.<init>(NodeEnvironment.java:203) ~[elasticsearch-6.4.2.jar:6.4.2]
elasticsearch_1  |  at org.elasticsearch.node.Node.<init>(Node.java:274) ~[elasticsearch-6.4.2.jar:6.4.2]
elasticsearch_1  |  at org.elasticsearch.node.Node.<init>(Node.java:256) ~[elasticsearch-6.4.2.jar:6.4.2]
elasticsearch_1  |  at org.elasticsearch.bootstrap.Bootstrap$5.<init>(Bootstrap.java:213) ~[elasticsearch-6.4.2.jar:6.4.2]
elasticsearch_1  |  at org.elasticsearch.bootstrap.Bootstrap.setup(Bootstrap.java:213) ~[elasticsearch-6.4.2.jar:6.4.2]
elasticsearch_1  |  at org.elasticsearch.bootstrap.Bootstrap.init(Bootstrap.java:326) ~[elasticsearch-6.4.2.jar:6.4.2]
elasticsearch_1  |  at org.elasticsearch.bootstrap.Elasticsearch.init(Elasticsearch.java:136) ~[elasticsearch-6.4.2.jar:6.4.2]
elasticsearch_1  |  ... 6 more

注意Caused by: java.nio.file.AccessDeniedException以上。该文件夹./elasticsearch/data存在，并且似乎travis:travis像往常一样归因于。

我需要帮助确定这里的根本原因，并找到一个希望不涉及使用chownor暴力破解权限的解决方案，并且该解决方案chmod也适用于我的本地计算机（即没有硬编码的 uid）。

标签： elasticsearchdocker-composetravis-ci

Answer 1

root默认情况下，Docker 容器始终以用户身份运行。因此，所有正在运行的进程、共享卷、文件夹、文件都将归root用户所有。

如果您不手动创建共享文件夹，docker 将创建它并归root用户所有：

$ ls -la
total 16
drwxrwxr-x  3 ubuntu ubuntu 4096 Oct 19 23:02 .
drwxrwxr-x 14 ubuntu ubuntu 4096 Oct 19 21:57 ..
-rw-rw-r--  1 ubuntu ubuntu  534 Oct 19 21:58 docker-compose.yaml
drwxr-xr-x  3 root   root   4096 Oct 19 23:02 elasticsearch

$ ls -laR elasticsearch
elasticsearch:
total 12
drwxr-xr-x 3 root   root   4096 Oct 19 23:02 .
drwxrwxr-x 3 ubuntu ubuntu 4096 Oct 19 23:02 ..
drwxr-xr-x 2 root   root   4096 Oct 19 23:02 data

elasticsearch/data:
total 8
drwxr-xr-x 2 root root 4096 Oct 19 23:02 .
drwxr-xr-x 3 root root 4096 Oct 19 23:02 ..

这就是为什么你有java.nio.file.AccessDeniedException.

如果我们在容器启动之前（在命令之前）创建./elasticsearch/data具有启动 docker 容器的用户权限的文件夹，则可以避免这种情况。docker-compose up对于您的特定情况，它是：

before_install:
- mkdir -p elasticsearch/data
- docker-compose up -d
- docker-compose logs -f &
- wget -q --waitretry=1 --retry-connrefused -T 10 -O - http://127.0.0.1:9200
[...more stuff here...]