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75b2ce7fd2
This returns list of all the services registered, with their current
status, past events, health state, etc.
New CLI is `osctl service [<id>]`: without `<id>` it prints list of all
the services, with specific `<id>` it provides details for a service.
I decided to create "parallel" data structures in protobuf as Go
structures don't map nicely onto what protoc generates: pointers vs.
values, additional fields like mutexes, etc. Probably there's a better
approach, I'm open for it.
For CLI, I tried to keep CLI stuff in `cmd/` package, and I also created
simple wrapper to remove duplicated code which sets up client for each
command.
Examples:
```
$ osctl service
SERVICE STATE HEALTH LAST CHANGE LAST EVENT
containerd Running OK 21s ago Health check successful
kubeadm Running ? 2s ago Started task kubeadm (PID 280) for container kubeadm
kubelet Running ? 0s ago Started task kubelet (PID 383) for container kubelet
ntpd Running ? 14s ago Started task ntpd (PID 129) for container ntpd
osd Running ? 14s ago Started task osd (PID 126) for container osd
proxyd Waiting ? 14s ago Waiting for conditions
trustd Running ? 14s ago Started task trustd (PID 125) for container trustd
udevd Running ? 14s ago Started task udevd (PID 130) for container udevd
```
```
$ osctl service proxyd
ID proxyd
STATE Running
HEALTH ?
EVENTS [Preparing]: Running pre state (22s ago)
[Waiting]: Waiting for conditions (22s ago)
[Preparing]: Creating service runner (6s ago)
[Running]: Started task proxyd (PID 461) for container proxyd (6s ago)
```
Signed-off-by: Andrey Smirnov <smirnov.andrey@gmail.com>