为什么 docker 在证书文件上推送注册表错误？

Question

如此处所述How to setup docker private registry on ubuntu 16.04、

我把/etc/hosts改成这样：

192.168.1.154 registry-server
192.168.1.90 registry-client

然后我拉取注册表镜像：

docker pull registry

然后我制作了证书文件

mkdir /etc/certs
cd /etc/certs
openssl req -newkey rsa:4096 -nodes -sha256 -keyout ca.key -x509 -days 365 -out ca.crt

我将 ca.crt 复制到客户端主机中的这些路径：

/etc/certs/
/etc/docker/certs.d/registry-server:5000/

然后我运行服务器主机上的容器：

docker run -d -p 5000:5000 --restart=always --name registry -v /etc/certs:/etc/certs -e REGISTRY_HTTP_TLS_CERTIFICATE=/etc/certs/ca.crt -e REGISTRY_HTTP_TLS_KEY=/etc/certs/ca.key registry

我标记了图片

docker tag phpmyadmin/phpmyadmin:latest registry-server:5000/pma-test

但是当我想将图片registry-server:5000/pma-test推送到服务器时：

docker push registry-server:5000/pma-test:latest

出现以下错误：

Error response from daemon: open /etc/docker/certs.d/registry-server:5000: permission denied

======================================

更新：

我运行journalctl -xe，发现了这些错误：

Sep 30 13:58:37 docker.dockerd[926]: time="2019-09-30T13:58:37.229097561Z" level=debug msg="Calling GET /_ping"

Sep 30 13:58:37 docker.dockerd[926]: time="2019-09-30T13:58:37.238248010Z" level=debug msg="Calling POST /v1.38/images/registry-server:5000/pma-test/push?tag="

Sep 30 13:58:37 docker.dockerd[926]: time="2019-09-30T13:58:37.238670117Z" level=debug msg="hostDir: /etc/docker/certs.d/registry-server:5000"

Sep 30 13:58:37 docker.dockerd[926]: time="2019-09-30T13:58:37.238797277Z" level=debug msg="FIXME: Got an API for which error does not match any expected type!!!: open /etc/docker/certs.d/registry-server:5000: permission denied" error_type="*os.PathError" module=api

Sep 30 13:58:37 docker.dockerd[926]: time="2019-09-30T13:58:37.238831133Z" level=error msg="Handler for POST /v1.38/images/registry-server:5000/pma-test/push returned error: open /etc/docker/certs.d/registry-server:5000: permission denied"

Sep 30 13:58:37 docker.dockerd[926]: time="2019-09-30T13:58:37.238861895Z" level=debug msg="FIXME: Got an API for which error does not match any expected type!!!: open /etc/docker/certs.d/registry-server:5000: permission denied" error_type="*os.PathError" module=api

Sep 30 13:58:37 audit[926]: AVC apparmor="DENIED" operation="open" profile="snap.docker.dockerd" name="/etc/docker/certs.d/registry-server:5000/" pid=926 comm="dockerd" requested_mask="r" denied_mask="r" fsuid=0 ouid=0

Sep 30 13:58:37 kernel: audit: type=1400 audit(1569851917.234:53): apparmor="DENIED" operation="open" profile="snap.docker.dockerd" name="/etc/docker/certs.d/registry-server:5000/" pid=926 comm="dockerd" requested_mask="r" denied_mask="r" fsuid=0 ouid=0

为什么会出现这个错误？

Docker 版本 19.03.2，构建 6a30dfc

docker-compose version 1.24.0, build 0aa59064

服务器和客户端主机：Ubuntu18.04

Answer 1

终于找到了：

我将以下行添加到 /var/lib/snapd/apparmor/profiles/snap.docker.docker

/etc/docker/certs.d/** r,

那我运行:

apparmor_parser -r /var/lib/snapd/apparmor/profiles/snap.docker.dockerd

问题解决了。

为什么 docker 在证书文件上推送注册表错误？

Why docker push registry errors on certificate file?

docker

ssl-certificate

docker-registry

self-signed

apparmor