2

How can I write docker containers in a Swarm to write data to any file system mount such as EBS, EFS, or even read data from S3?

4

1 回答 1

4

使用 AWS 策略获得 EFS、EBS、S3 插件

完整的答案细节在https://github.com/codedellemc/rexray/issues/820#issuecomment-323624765。

  • 我使用 RexRay Docker Volume 插件来支持 EBS、EFS 和 S3
    • 该卷允许您在不使用任何 AWS API 的情况下自动将其中一个加载为容器内的文件系统挂载。也就是对容器透明！！！

这是示例

docker service create --replicas 10 
    --name echo-to-efs 
    --mount type=volume,source=echo_data,target=/test,volume-driver=rexray/efs 
    alpine /bin/sh -c 'echo "writing from $HOSTNAME" >> \
                 /test/echo.log ; cat /test/echo.log ; sleep 30'
iy4rzd4imq776abjlqdqf8l10

EFS MOUNTS 在此处输入图像描述

EBS MOUNTS 在此处输入图像描述

安装卷插件

使用他们的 docker 命令行参数对他们每个人重复...

[root@ip-10-zz-yy-xx ec2-user]# sudo docker plugin install --grant-all-permissions rexray/s3fs latest: Pulling from rexray/s3fs 5a6437c91cc6: Download complete Digest: sha256:6ba105974d5298ff49def3c83e5547d41e573e0a3cb8604f1dcb1a0f90ee070b Status: Downloaded newer image for rexray/s3fs:latest Installed plugin rexray/s3fs

Docker 插件 ls

  • 设置 UserData 以安装 3 个插件后，一切正常！

[ec2-user@ip-10-82-48-59 ~]$ docker plugin ls ID NAME DESCRIPTION ENABLED 0eb15d4a9594 rexray/s3fs:latest REX-Ray FUSE Driver for Amazon Simple Stor... true 6bae636cb377 rexray/ebs:latest REX-Ray for Amazon EBS true 9e231d9177c2 rexray/efs:latest REX-Ray for Amazon EFS true

Docker 容器自动创建/挂载卷

根据经验，我学到了以下内容：

  • EFS = 并发写入（x 个副本方案）
  • EBS = 单次写入（1 个复制场景）

因此，下面的示例显示了以下内容：

  • 创建 10 个 Docker 容器同时写入同一个文件

Last login: Mon Aug 21 00:34:46 2017 from 10.82.49.230 [ec2-user@ip-10-zz-yy-xx ~]$ docker service create --replicas 10 --name echo-to-efs
--mount type=volume,source=echo_data,target=/test,volume-driver=rexray/efs alpine /bin/sh -c 'echo "writing from $HOSTNAME" >> /test/echo.log ; cat /test/echo.log ; sleep 30' iy4rzd4imq776abjlqdqf8l10

  • 展示了他们中的docker ps一些人写作和失败
    • 如果有人可以解释为什么此案中有些失败，请告诉我...
    • 我有REXRAY_PREEMPT=true，不知道这是否无关

[ec2-user@ip-10-82-48-59 ~]$ docker service ps echo-to-efs ID NAME IMAGE NODE DESIRED STATE CURRENT STATE ERROR PORTS 8c8lxqcoc3n5 echo-to-efs.1 alpine:latest ip-10-82-48-59.vpc.internal Running Running 8 seconds ago 23meciw5cvad echo-to-efs.2 alpine:latest ip-10-82-49-52.vpc.internal Running Running 2 seconds ago si7lg30kb13b \_ echo-to-efs.2 alpine:latest ip-10-82-48-93.vpc.internal Shutdown Failed about a minute ago "starting container failed: er…" rmj163xu97ai echo-to-efs.3 alpine:latest ip-10-82-48-96.vpc.internal Running Running 7 seconds ago 5jtao2yu5udt echo-to-efs.4 alpine:latest ip-10-82-48-95.vpc.internal Running Running 8 seconds ago wot9hd5nbjsz echo-to-efs.5 alpine:latest ip-10-82-49-71.vpc.internal Running Running 7 seconds ago hcbbgfiuga9c echo-to-efs.6 alpine:latest ip-10-82-48-140.vpc.internal Running Starting 49 seconds ago wrnnrsm16usr \_ echo-to-efs.6 alpine:latest ip-10-82-48-25.vpc.internal Shutdown Rejected 58 seconds ago "create echo_data: VolumeDrive…" w3v4x0pf9uri \_ echo-to-efs.6 alpine:latest ip-10-82-48-37.vpc.internal Shutdown Rejected about a minute ago "create echo_data: VolumeDrive…" okgda40hb4hy \_ echo-to-efs.6 alpine:latest ip-10-82-49-107.vpc.internal Shutdown Rejected about a minute ago "create echo_data: VolumeDrive…" bzoafno0gb4d echo-to-efs.7 alpine:latest ip-10-82-48-74.vpc.internal Running Running 7 seconds ago rk7uebz4cdql echo-to-efs.8 alpine:latest ip-10-82-49-111.vpc.internal Running Running 6 seconds ago hy1rfid4zitl echo-to-efs.9 alpine:latest ip-10-82-48-162.vpc.internal Running Running 7 seconds ago k5lmmmu44yh3 echo-to-efs.10 alpine:latest ip-10-82-48-187.vpc.internal Running Running 8 seconds ago

  • 现在我们可以验证文件是否正在写入......

[ec2-user@ip-10-82-48-59 ~]$ docker service logs echo-to-efs echo-to-efs.1.8c8lxqcoc3n5@ip-10-82-48-59.vpc.internal | writing from 3da21bc313f7 echo-to-efs.3.rmj163xu97ai@ip-10-82-48-96.vpc.internal | writing from 3da21bc313f7 echo-to-efs.1.8c8lxqcoc3n5@ip-10-82-48-59.vpc.internal | writing from 334b26ce3747 echo-to-efs.7.bzoafno0gb4d@ip-10-82-48-74.vpc.internal | writing from 3da21bc313f7 echo-to-efs.7.bzoafno0gb4d@ip-10-82-48-74.vpc.internal | writing from 334b26ce3747 echo-to-efs.3.rmj163xu97ai@ip-10-82-48-96.vpc.internal | writing from 334b26ce3747 echo-to-efs.1.8c8lxqcoc3n5@ip-10-82-48-59.vpc.internal | writing from fcefd6eb5035 echo-to-efs.1.8c8lxqcoc3n5@ip-10-82-48-59.vpc.internal | writing from 84ffd56fdcfa echo-to-efs.1.8c8lxqcoc3n5@ip-10-82-48-59.vpc.internal | writing from b7ecbd01debe echo-to-efs.1.8c8lxqcoc3n5@ip-10-82-48-59.vpc.internal | writing from e5ef2a2821a2 echo-to-efs.1.8c8lxqcoc3n5@ip-10-82-48-59.vpc.internal | writing from 5179f81f04f9 echo-to-efs.1.8c8lxqcoc3n5@ip-10-82-48-59.vpc.internal | writing from 5e859dce0c2f echo-to-efs.7.bzoafno0gb4d@ip-10-82-48-74.vpc.internal | writing from fcefd6eb5035 echo-to-efs.3.rmj163xu97ai@ip-10-82-48-96.vpc.internal | writing from fcefd6eb5035 echo-to-efs.7.bzoafno0gb4d@ip-10-82-48-74.vpc.internal | writing from 84ffd56fdcfa echo-to-efs.7.bzoafno0gb4d@ip-10-82-48-74.vpc.internal | writing from b7ecbd01debe echo-to-efs.3.rmj163xu97ai@ip-10-82-48-96.vpc.internal | writing from 84ffd56fdcfa echo-to-efs.3.rmj163xu97ai@ip-10-82-48-96.vpc.internal | writing from b7ecbd01debe echo-to-efs.3.rmj163xu97ai@ip-10-82-48-96.vpc.internal | writing from e5ef2a2821a2 echo-to-efs.4.5jtao2yu5udt@ip-10-82-48-95.vpc.internal | writing from 3da21bc313f7 echo-to-efs.3.rmj163xu97ai@ip-10-82-48-96.vpc.internal | writing from 5179f81f04f9 echo-to-efs.7.bzoafno0gb4d@ip-10-82-48-74.vpc.internal | writing from e5ef2a2821a2 echo-to-efs.3.rmj163xu97ai@ip-10-82-48-96.vpc.internal | writing from 5e859dce0c2f ... ...

  • 现在查看文件中的当前值。
    • 此处的命令将同时挂载卷，然后从 EFS 挂载中读取文件。
    • 容器准备装载确实需要很长时间......就像2分钟......不确定这是否是预期的。

[ec2-user@ip-10-82-48-59 ~]$ docker run -ti --volume-driver=rexray/efs -v echo_data:/test alpine cat /test/echo.log Unable to find image 'alpine:latest' locally latest: Pulling from library/alpine Digest: sha256:1072e499f3f655a032e88542330cf75b02e7bdf673278f701d7ba61629ee3ebe Status: Downloaded newer image for alpine:latest writing from 3da21bc313f7 writing from 334b26ce3747 writing from fcefd6eb5035 writing from 84ffd56fdcfa writing from b7ecbd01debe writing from e5ef2a2821a2 writing from 5179f81f04f9 writing from 5e859dce0c2f writing from af94a5a29b4a writing from a3f860caaf03 writing from b7b3d30d2f8e writing from cf65a52760c0 writing from a551b529e599 writing from 0533784ce9e5 writing from d78f781baa4d writing from 06b84229ec32 writing from 4e3974cfb8a9 writing from 007cd66062e7 writing from 665f76589ae2 writing from 68b04985559a writing from 9a2e19e110fb writing from 1ed7903abf86 writing from 763c7eea52fb writing from 529c7fff9c71 writing from 7172d5fb56d9 writing from c33294ce8d9d writing from b95a5b5f1bc1 writing from ff269d8a78ba writing from b1299af12f30 writing from 4f970a6e234d writing from a4a1f331b3c9 writing from bb3915d9d242 writing from 0fbafba12a0c writing from 017f70a769da writing from 8d657b23571f writing from 570e2fa76e16 writing from 45a92f3d19b4 writing from 3b02cb3675e4 writing from e2d49358df6f

Docker 卷状态

  • Docker 卷现在使用插件映射所有挂载
    • 这对我来说是一个重大胜利！

[ec2-user@ip-10-82-48-59 ~]$ docker volume ls DRIVER VOLUME NAME rexray/s3fs:latest 7820-3357-5600-us-west-2 rexray/s3fs:latest cf-templates-8hmsxuf2muaa-us-west-2 rexray/efs:latest echo_data rexray/s3fs:latest marcello-12345 rexray/s3fs:latest marcello-testing-bucket-1 rexray/s3fs:latest marcello-testing-bucket-2 rexray/s3fs:latest new-config-publisher rexray/s3fs:latest publisher.intuit-caas rexray/s3fs:latest publisher.intuit-caas-new-update rexray/ebs:latest quay-registry-configs rexray/ebs:latest quay-registry-images-datastore rexray/ebs:latest quay-registry-mysql-datastore rexray/ebs:latest registry_configs rexray/ebs:latest registry_mysql-data rexray/s3fs:latest swarmbucket-vpc-155e5072

于 2017-08-21T01:19:00.367 回答