[1.0] rootless+cgroup2+systemd: improve error message when dbus-user-session is not installed #3186 #3212
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Before:
```console
$ docker --context=rootless run -it --rm alpine
docker: Error response from daemon: OCI runtime create failed: unable to start
container process: unable to apply cgroup configuration: unable to start unit
"docker-7ef2c29ccafc1ed9c7fd9859337e5b79870d8ccb282f560e43060a847a6c5310.scope"
(properties [{Name:Description Value:"libcontainer container
7ef2c29ccafc1ed9c7fd9859337e5b79870d8ccb282f560e43060a847a6c5310"} {Name:Slice
Value:"user.slice"} {Name:PIDs Value:@au [6286]} {Name:Delegate Value:true}
{Name:MemoryAccounting Value:true} {Name:CPUAccounting Value:true}
{Name:IOAccounting Value:true} {Name:TasksAccounting Value:true}
{Name:DefaultDependencies Value:false}]): read unix @->/run/systemd/private:
read: connection reset by peer: unknown.
```
After:
```console
$ docker --context=rootless run -it --rm alpine
docker: Error response from daemon: OCI runtime create failed: unable to start
container process: unable to apply cgroup configuration: unable to start unit
"docker-8527d83e046da46d1b56b1c6a89324e687da1c365e044b8dde52cfbf1c461c5a.scope"
(properties [{Name:Description Value:"libcontainer container
8527d83e046da46d1b56b1c6a89324e687da1c365e044b8dde52cfbf1c461c5a"} {Name:Slice
Value:"user.slice"} {Name:PIDs Value:@au [10012]} {Name:Delegate Value:true}
{Name:MemoryAccounting Value:true} {Name:CPUAccounting Value:true}
{Name:IOAccounting Value:true} {Name:TasksAccounting Value:true}
{Name:DefaultDependencies Value:false}]): failed to connect to dbus (hint: for
rootless containers, maybe you need to install dbus-user-session package, see
https://github.com/opencontainers/runc/blob/master/docs/cgroup-v2.md): read
unix @->/run/systemd/private: read: connection reset by peer: unknown.
```
For moby/moby issue 42793
Signed-off-by: Akihiro Suda <akihiro.suda.cz@hco.ntt.co.jp>
(cherry picked from commit 1f5798f)
Signed-off-by: Akihiro Suda <akihiro.suda.cz@hco.ntt.co.jp>
|
@thaJeztah PTAL |
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Cherry-pick #3186 (clean)