Re: Cluster

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Clusterlabs' Pacemaker - https://wiki.clusterlabs.org/wiki/Pacemaker -
almost definitely can do what you want; it includes a bunch of very mature
primitives for things like master elections, reliable resource takeover,
etc.

Colm


On Fri, 30 Jul 2021 at 10:57, Harry Duncan <[email protected]> wrote:

> Hi Guys,
>
> I have a linux server running centos, and I want warm standby machines for
> failover if there is a problem.
>
> The server runs an application and has data. What differentiates a live
> server from warm backup is cron jobs.
>
> I want to write a script to take up and down the cron jobs, no biggie.
> What I'm looking for is a way to communicate state with other servers in
> the cluster where when taking the master role, the server can contact other
> known servers in the cluster and ask are you master, and drop the task of
> promotion with an error if a master answers.
>
> To achieve this, I need a way of communicating state. Is there anything in
> the FOSS world that you guys have experience of that fits this bill off the
> shelf or do I need to roll my own?
>
> TIA,
>
> Harry.
>
> --
> Irish Linux Users Group
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> .
>


-- 
Colm Buckley | [email protected]

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<div dir=3D"ltr">Clusterlabs&#39; Pacemaker -=C2=A0<a href=3D"https://wiki.=
clusterlabs.org/wiki/Pacemaker">https://wiki.clusterlabs.org/wiki/Pacemaker=
</a> - almost definitely can do what you want; it includes a bunch of very =
mature primitives for things like master elections, reliable resource takeo=
ver, etc.<div><br></div><div><blockquote style=3D"margin:0 0 0 40px;border:=
none;padding:0px"><div>Colm</div><div><br></div></blockquote></div></div><b=
r><div class=3D"gmail_quote"><div dir=3D"ltr" class=3D"gmail_attr">On Fri, =
30 Jul 2021 at 10:57, Harry Duncan &lt;<a href=3D"mailto:usr.src.linux@gmai=
l.com">[email protected]</a>&gt; wrote:<br></div><blockquote class=3D=
"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(2=
04,204,204);padding-left:1ex">Hi Guys,<div><br></div><div>I have a linux se=
rver running centos, and I want warm standby machines for failover if there=
 is a problem.</div><div><br></div><div>The server runs an application and =
has data. What differentiates a live server from warm backup is cron jobs.<=
/div><div><br></div><div>I want to write a script to take up and down the c=
ron jobs, no biggie. What I&#39;m looking for is a way to communicate state=
 with other servers in the cluster where when taking the master role, the s=
erver can contact other known servers in the cluster and ask are you master=
, and drop the task of promotion with an error if a master answers.</div><d=
iv><br></div><div>To achieve this, I need a way of communicating state. Is =
there anything in the FOSS world that you guys have experience of that fits=
 this bill off the shelf or do I need to roll my own?</div><div><br></div><=
div>TIA,</div><div><br></div><div>Harry.</div>

<p></p>

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n%40linux.ie</a>.<br>
</blockquote></div><br clear=3D"all"><div><br></div>-- <br><div dir=3D"ltr"=
 class=3D"gmail_signature"><div dir=3D"ltr"><div><div dir=3D"ltr"><span sty=
le=3D"color:rgb(153,153,153);font-size:x-small">Colm Buckley |=C2=A0</span>=
<a href=3D"mailto:[email protected]" style=3D"font-size:x-small" target=3D"_b=
lank">[email protected]</a><div><br></div></div></div></div></div>

<p></p>

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