Have you checked your apache logs for error messages?
Cheers,
Bernard
________________________________
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of
Hardian Suprapto
Sent: Thursday, September 08, 2005 18:01
To: [EMAIL PROTECTED]
Cc: [email protected]
Subject: Re: [Ganglia-general] open web frontend from different
host using web browser
Hi Chang,
Thanks for the information, but I think my problem somewhat
simpler than what you have right now. In your reply, you mention that
you have at least three hosts act as ganglia server since all host A, B
and C have gmond and gmetad running. Correct me if I'm wrong, gmetad is
used for collecting data from all nodes that have gmond running inside
them, right?
But for my problem, I only have 1 server (server01) which has
gmond and gmetad running inside it and all other nodes only has gmond
running inside them. When I open my web browser like mozilla in server01
and display ganglia web side locally by typing: server01/ganglia, it's
working. I can see all the graphs and the data looks fine to me.
Then, I go to my laptop (which is still in the same LAN), I open
my web browser (Internet explorer) then I typed: server01/ganglia, the
ganglia web site is showing and I can browse around but most of the
graphs somehow couldn't show up. Some of them can, though. This is only
a hunch, is it because of the server01 was too busy collecting the data
from all gmond from every node? I did try to reduce the refreshing time
at gmetad.conf but it is still showing the same behaviour.
Do you know what went wrong? Cause, basically, we could see the
ganglia web site from any web browser from any computer inside my
network, right?
Thanks in advance, and I'd appreciate your response =)
With kind regards,
Hardian
Jr. System Engineer
michael chang <[EMAIL PROTECTED]> wrote:
On 9/8/05, Hardian Suprapto wrote:
> Hi All,
>
> Before I had problem with showing graphics using web
browser in localhost
> cause the graphs didn't show up. Now, I can see all
the graphs in ganglia
> web frontend using web browser in localhost by typing:
localhost/ganglia
>
> Now, I want to monitor it from my office using my web
browser in my laptop
> by typing:
> server01/ganglia
> lets say the host that have ganglia installed is
server01.
>
> I can see the ganglia website but the graphs couldn't
show up. Only 1 or 2
> graphs can show up. Then I go back to server01 and I
go to the web browser
> in server01 and as before, I can see all the graphs
and they are working
> just fine.
>
> Are there anybody who got the same experience as mine?
How to overcome this
> problem?
You can only monitor data recieved locally -- chances
are, the data is
being fully transmitted one-way, or the problem you
solved at one site
wasn't solved at the other.
I've found that even if you monitor from both locations,
more often
than not there is an inconsistancy; when various hosts
come and go,
syncronization needs to be performed (as far as I know,
it isn't being
performed at the moment in recent stable versions, but I
haven't been
able to check the very latest versions due to GCC
incompatabilities).
For example:
Host A, B, C, all come online. All have gmond and
gmetad, and A and C
both have web interfaces. A and B are at location 1, C
is at location
2. The three send monitor packets over a VPN interface
(e.g. a tun
interface provided by OpenVPN). Then, host C shuts down.
Then,
everyone goes down. Then host C comes up, and then B,
and then A,
then B goes down, and A reboot s, and then C goes down,
before A goes
down at the end.
If you examine the data, none of them will have the same
data on the
set. Makes for a very confusing read. That said, I'm
pretty sure
there's probably supposedly some scheme around this that
I haven't
figured out yet.
What I wouldn't want to do (but may end up doing) is
determining which
hosts enter the network, and updating the configs
manually for those
-- e.g. if I have 192.168.90.1, 192.168.90.6,
192.168.90.10, and
192.168.90.14, I don't want to update the config on all
machines (the
four existing, plus the new one) if I add a
192.168.90.18. However,
since OpenVPN seems like it's going to already require
something like
this (for my setup, anyways) I'll probably end up doing
similarly with
Ganglia. Of course, optimally, autodetection would be
awesome.
--
~Mike
- Just my two cents
- No man is an island, and no man is unable.
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