[Gluster-devel] New project on the Forge - gstatus

[Vijay Bellur]

On 02/10/2014 02:00 AM, Paul Cuzner wrote:
>
> Hi,
>
> I've started a new project on the forge, called gstatus.- wiki page is
> https://forge.gluster.org/gstatus/pages/Home
>
> The idea is to provide admins with a single command to assess the state
> of the components of a cluster - nodes, bricks and volume states -
> together with capacity information.
>
> It's the kind of feature that would be great (IMO) as a sub command of
> gluster i.e. gluster status - but as a stop gap here's the python
> project (we could even use this as a prototype!)
>
> On the wiki page, you'll find some additional volume status definitions
> that I've dreamt up - online-degraded, online-partial, to describe the
> effect brick down events have on a volume's data availability. There are
> output examples on the wiki, but here's some examples to show you what
> you currently get from the tool
>
> On my test 4-way cluster, this is what a healthy state looks like
>
> [root at rhs1-1 gstatus]# ./gstatus.py
> Analysis complete
>
> Cluster Summary:
> Version - 3.4.0.44rhs Nodes - 4/ 4 Bricks - 4/ 4 Volumes - 1/ 1
>
> Volume Summary
>    myvol     ONLINE (4/4 bricks online) - Distributed-Replicate
>              Capacity: 64.53 MiB/19.97 GiB (used,total)
>
> Status Messages
> Cluster is healthy, all checks successful
>
> And then if I take a *two nodes* down, that provide bricks to the *same
> replica set*, I see;
>
> Analysis complete
>
>
> Cluster Summary:
> Version - 3.4.0.44rhs Nodes - 2/ 4 Bricks - 2/ 4 Volumes - 0/ 1
>
> Volume Summary
> myvol   ONLINE_PARTIAL (2/4 bricks online) - Distributed-Replicate
>          Capacity: 32.27 MiB/9.99 GiB (used,total)
>
>
> Status Messages
>      - rhs1-4 is down
>      - rhs1-2 is down
>      - Brick rhs1-4:/gluster/brick1 is down/unavailable
>      - Brick rhs1-2:/gluster/brick1 is down/unavailable
>
>
>


This is great!

I think adding one more for the client stack would be neat. A tool 
similar to nfsstat/nfsiostat which can expose various counters in 
iostats xlator and also status information like brick connectivity from 
the client perspective. I also have a cool name for that - glusteriostat ;)

Cheers,
Vijay