测试drone部署镜像又遇到N个坑。第一个就是拉取镜像被墙。好吧，这个可以通过国内镜像解决。另一个就是一直在报的错误
Failed to create btrfs snapshot: inappropriate ioctl for device
硬件设置还是synology 716 + II
.drone.yml
# workspace:
# base: /go
# path: src/test/demo
pipeline:
# build:
# image: golang:latest
# commands:
# - go test
publish:
image: plugins/docker
repo: sunsl/demo
tags : latest
debug: true
# services:
# database:
# image: mongo:latest
编译错误
群晖docker信息
从信息中可以看到 Storage Driver为btrfs
在Use the BTRFS storage driver文中有这样的提示：
Note: The btrfs storage driver is only supported on Docker CE on Ubuntu or Debian, and Docker EE / CS Engine on SLES.
折腾了一天多的时间，看到这里郁闷了，好吧暂时放弃在群晖下测试drone，换服务器测试.....
==,先梳理下思路，看看还有什么没测试到的地方
- docker运行在btrfs存储上
- docker启动drone的server和agent容器
- drone根据配置文件启动一个测试容器（与drone是同一层级的容器）
- 测试容器内启动一个docker并根据dockerfile生成镜像文件（Docker in Docker）
逐步测试：
- 在最外层测试创建镜像 (测试通过）
Dockerfile
FROM alpine
RUN echo "Hello docker!"
RUN echo "make dir"
RUN mkdir -p /data/db
RUN echo "expose port"
EXPOSE 8000
编译
sudo docker build -t sunsl/demo .
Sending build context to Docker daemon 2.048 kB
Step 1 : FROM alpine
---> 7328f6f8b418
Step 2 : RUN echo "Hello docker!"
---> Running in ce54f9d9a8e6
Hello docker!
---> ef0ff48accdc
Removing intermediate container ce54f9d9a8e6
Step 3 : RUN echo "make dir"
---> Running in 6fa6e5a214e9
make dir
---> eae38249e291
Removing intermediate container 6fa6e5a214e9
Step 4 : RUN mkdir -p /data/db
---> Running in 7ff9d7c7f1bd
---> cb5244f6649e
Removing intermediate container 7ff9d7c7f1bd
Step 5 : RUN echo "expose port"
---> Running in 36e80521a0b2
expose port
---> aa9dc796f37a
Removing intermediate container 36e80521a0b2
Step 6 : EXPOSE 8000
---> Running in 686876f7af63
---> b6081a0bce0d
Removing intermediate container 686876f7af63
Step 7 : RUN echo "completed!!!"
---> Running in c227d0885785
completed!!!
---> 610405572a84
Removing intermediate container c227d0885785
Successfully built 610405572a84
- 启动一个library/docker在其内部创建镜像（Docker in Docker） 测试正常！！！
sudo docker run -it --privileged --name some-docker -d docker:17.07.0-ce-dind
admin@sunsl-dev:~$ sudo docker run -it --privileged --name some-docker -d docker:17.07.0-ce-dind
f131d5b26279e7023d6c5a6224c63e1aaa96ff4882aa3975a14031293a51712c
admin@sunsl-dev:~$ sudo docker run -it --rm --link some-docker:docker docker sh
~ # mkdir docker
~ # vi Dockerfile
~ # docker build -t sunsl/demo .
Sending build context to Docker daemon 3.584kB
Step 1/7 : FROM daocloud.io/library/alpine:latest
---> 7328f6f8b418
Step 2/7 : RUN echo "Hello docker!"
---> Running in 3d04694eef2c
Hello docker!
---> 6635ba3812c5
Removing intermediate container 3d04694eef2c
Step 3/7 : RUN echo "make dir"
---> Running in 4d09d0b04bcb
make dir
---> 30fc023d529e
Removing intermediate container 4d09d0b04bcb
Step 4/7 : RUN mkdir -p /data/db
---> Running in 4947b984c06f
---> 34a97a2eb15e
Removing intermediate container 4947b984c06f
Step 5/7 : RUN echo "expose port"
---> Running in 4f70ac65e998
expose port
---> a45dd54382f5
Removing intermediate container 4f70ac65e998
Step 6/7 : EXPOSE 8000
---> Running in 172ee2942a7e
---> c41f37ed56d8
Removing intermediate container 172ee2942a7e
Step 7/7 : RUN echo "completed!!!"
---> Running in a73429ff68c8
completed!!!
---> ba0d6edfd0db
Removing intermediate container a73429ff68c8
Successfully built ba0d6edfd0db
Successfully tagged sunsl/demo:latest
- 测试是否与群晖登录权限有关 （无效）
手动测试全部正常，考虑是否是与权限有关。因不知道drone是否在启动docker in docker是追加了权限，所以尝试启动群晖的root权限运行drone并设置docker的--privileged参数 。参考：群晖root密码设置
4.想到一个问题，在手动测试docker in docker时的info信息如下：
admin@sunsl-dev:~$ sudo docker run -it --rm --link some-docker:docker docker info
……
Server Version: 17.07.0-ce-rc2 #版本号
Storage Driver: vfs #这里才是重点
……
Kernel Version: 3.10.102
Operating System: Alpine Linux v3.6 (containerized)
OSType: linux
Architecture: x86_64
CPUs: 4
Total Memory: 7.719GiB
……
详细测试记录：docker run docker 手动测试记录
看到区别了吗？群晖存存格式是btrfs,而docker内用的是vfs格式！！！跪了！！！
然后....TMD继续找资料，如何设置配置文件啊。
storage_driver
supports aufs, overlay or vfs drivers
.drone.yml
……省略其它pipeline部分
publish:
image: plugins/docker
registry: 192.168.123.202:55000
repo: 192.168.123.202:55000/sunsl/demo
tags : latest
debug: true
insecure: true #私有仓库未设置HTTPS需要启用这个选项
storage_driver: vfs #出错原因就是它
……省略其它pipeline部分
两天的成果啊！！！
参考：
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