<html>
<head>
<meta content="text/html; charset=windows-1252"
http-equiv="Content-Type">
</head>
<body bgcolor="#FFFFFF" text="#000000">
Hi,<br>
<br>
On 05/10/2015 05:24 AM, Tiago Santos wrote:<br>
<blockquote
cite="mid:CA+aOaiJsQBOHYo7sjpQXyFaMkvXhm894pNVHG+jqCXnuP2GhoA@mail.gmail.com"
type="cite">
<div dir="ltr"><span style="font-size:13px">Hello folks,</span>
<div style="font-size:13px"><br>
</div>
<div style="font-size:13px"><br>
</div>
<div style="font-size:13px">I've been developing an initial
version of a fencing agent to allow management of Profitbricks
VMs (<a moz-do-not-send="true" href="http://profitbricks.com/"
target="_blank">http://profitbricks.com/</a>).</div>
<div style="font-size:13px"><br>
</div>
<div style="font-size:13px">The initial code can be seen at <a
moz-do-not-send="true"
href="https://github.com/tetreis/profitbricks_stonith_plugin/blob/master/profitbricks"
target="_blank">https://github.com/tetreis/profitbricks_stonith_plugin/blob/master/profitbricks</a><br>
</div>
<div style="font-size:13px"><br>
</div>
<div style="font-size:13px"><br>
</div>
<div style="font-size:13px">The fencing agent uses ProfitBricks
SOAP API, that can be found at <a moz-do-not-send="true"
href="https://devops.profitbricks.com/api/soap/"
target="_blank">https://devops.profitbricks.com/api/soap/</a></div>
</div>
</blockquote>
<blockquote
cite="mid:CA+aOaiJsQBOHYo7sjpQXyFaMkvXhm894pNVHG+jqCXnuP2GhoA@mail.gmail.com"
type="cite">
<div dir="ltr">
<div style="font-size:13px"><br>
</div>
<div style="font-size:13px">It uses a config file that
translates the provided node name to ProfitBricks server ID.
The call is like:</div>
<div style="font-size:13px"><br>
</div>
<div style="font-size:13px">
<div>/usr/lib/stonith/plugins/external/profitbricks action
hostname</div>
<div> Action can be: status, on, off, reset</div>
<div> Hostname needs to be on config file (/etc/pb.conf)</div>
</div>
<div style="font-size:13px"><br>
</div>
<div style="font-size:13px">It works fine on basic manual tests.</div>
</div>
</blockquote>
In general, we prefer that fence agents do not use configuration
files.<br>
<br>
If you don't have aversion against python, it should be pretty
simple to convert it to our fencing library that will provide
everything required (metadata, manual pages generation, ...). There
is already agent that<br>
uses SOAP (fence_vmware_soap*) so it can be used as a basis.<br>
<br>
If you have any question/problem, feel free to ask. <br>
<br>
m,<br>
<br>
(*) = it is more complex than it is required in your case as it uses
attributes in a strange way<br>
<br>
<blockquote
cite="mid:CA+aOaiJsQBOHYo7sjpQXyFaMkvXhm894pNVHG+jqCXnuP2GhoA@mail.gmail.com"
type="cite">
<div dir="ltr">
<div style="font-size:13px"><br>
</div>
<div style="font-size:13px"><br>
</div>
<div style="font-size:13px">It also replies correctly to:</div>
<div style="font-size:13px"><br>
</div>
<div style="font-size:13px">
<div># stonith -t external/profitbricks -h</div>
<div><br>
</div>
<div><br>
</div>
<div>STONITH Device: external/profitbricks - ProfitBricks host
reboot/poweron/poweroff/status</div>
<div><br>
</div>
<div>For more information see <a moz-do-not-send="true"
href="http://profitbricks.com/" target="_blank">http://profitbricks.com/</a></div>
<div><br>
</div>
<div>List of valid parameter names for external/profitbricks
STONITH device:</div>
<div><span style="white-space:pre-wrap"> </span>hostname</div>
<div>
<div>
<div>For Config info [-p] syntax, give each of the above
parameters in order as</div>
<div>the -p value.</div>
<div>Arguments are separated by white space.</div>
<div>Config file [-F] syntax is the same as -p, except #
at the start of a line</div>
<div>denotes a comment</div>
</div>
<div><br>
</div>
<div><br>
</div>
<div><br>
</div>
<div>But I'm having a hard time figuring out how to make it
work with STONITH (or maybe understanding how STONITH
works - sorry, I'm a total newbie on this) and how to
configure it with Pacemaker/Corosync.</div>
<div><br>
</div>
<div>All this to request your help on the following two
points:</div>
<div><br>
</div>
<div><br>
</div>
<div>1. When I run:</div>
<div><br>
</div>
<div># stonith -t external/profitbricks -p status node1<br>
</div>
<div><br>
</div>
<div>I get a node reset.</div>
<div><br>
</div>
<div>And when I run:</div>
<div><br>
</div>
<div># stonith -t external/profitbricks -p node1<br>
</div>
<div><br>
</div>
<div>I get the default stonith usage help, like if my syntax
is wrong.</div>
<div><br>
</div>
<div>I've read and researched a lot, but couldn't figure out
what I'm doing wrong here, although it seems to be pretty
basic mistake.</div>
<div><br>
</div>
<div><br>
</div>
<div><br>
</div>
<div>2. I have a setup with Pacemaker/Corosync configured.
Virtual/floating IP (resource) works just fine and solid.
Then I'm trying to add STONITH using the ProfitBricks
plugin. I have a file with the following configuration for
crm:</div>
<div><br>
</div>
<div>configure</div>
</div>
<div>
<div>
<div>primitive st-node1 stonith:external/profitbricks \</div>
<div>params hostname=node1</div>
<div>primitive st-node2 stonith:external/profitbricks \</div>
<div>params hostname=node2</div>
<div>location l-st-node1 st-node1 -inf: node1</div>
<div>location l-st-node2 st-node2 -inf: node2</div>
<div>commit</div>
</div>
<div><br>
</div>
<div>I call it like:</div>
<div><br>
</div>
<div>crm < file.config</div>
<div><br>
</div>
<div><br>
</div>
<div>Then I'll see on the fencing agent the usage error
(called when $1 is not recognised):</div>
<div><br>
</div>
<div>
<div>Usage: /usr/lib/stonith/plugins/external/profitbricks
action hostname</div>
<div> Action can be: status, on, off, reset</div>
<div> Hostname needs to be on config file
(/etc/pb.conf)</div>
</div>
<div><br>
</div>
<div><br>
</div>
<div>crm_mon will give me:</div>
<div><br>
</div>
<div>
<div># crm_mon -1</div>
<div>Last updated: Sat May 9 20:12:47 2015</div>
<div>Last change: Sat May 9 20:12:40 2015 via cibadmin on
node1</div>
<div>Stack: corosync</div>
<div>Current DC: node1 (1084751975) - partition with
quorum</div>
<div>Version: 1.1.10-42f2063</div>
<div>2 Nodes configured</div>
<div>3 Resources configured</div>
<div><br>
</div>
<div><br>
</div>
<div>Online: [ node1 node2 ]</div>
</div>
</div>
<div><br>
</div>
<div>
<div><br>
</div>
<div> VIP<span style="white-space:pre-wrap"> </span>(ocf::heartbeat:IPaddr2):<span
style="white-space:pre-wrap"> </span>Started node1</div>
<div><br>
</div>
<div>Failed actions:</div>
<div> st-node2_start_0 (node=node1, call=64, rc=1,
status=Error, last-rc-change=Sat May 9 20:12:41 2015</div>
<div>, queued=3195ms, exec=0ms</div>
<div>): unknown error</div>
<div> st-node1_start_0 (node=node2, call=18, rc=1,
status=Error, last-rc-change=Sat May 9 20:12:40 2015</div>
<div>, queued=4202ms, exec=0ms</div>
<div>): unknown error</div>
</div>
<div><br>
</div>
<div><br>
</div>
<div>And inside crm both services are stopped:</div>
<div><br>
</div>
<div>
<div># crm</div>
<div>crm(live)# resource list</div>
<div> VIP<span style="white-space:pre-wrap"> </span>(ocf::heartbeat:IPaddr2):<span
style="white-space:pre-wrap"> </span>Started</div>
<div> st-node1<span style="white-space:pre-wrap"> </span>(stonith:external/profitbricks):<span
style="white-space:pre-wrap"> </span>Stopped</div>
<div> st-node2<span style="white-space:pre-wrap"> </span>(stonith:external/profitbricks):<span
style="white-space:pre-wrap"> </span>Stopped</div>
</div>
<div><br>
</div>
<div><br>
</div>
<div>Would you guys help me figure out what's blocking me from
going ahead on this story?</div>
<div><br>
</div>
<div>I know the fencing agent is still not obeying all the
rules described at <a moz-do-not-send="true"
href="https://fedorahosted.org/cluster/wiki/FenceAgentAPI"
target="_blank"
style="color:rgb(31,141,214);text-decoration:none;font-family:proxima-nova,'Helvetica
Neue',Arial,sans-serif;font-size:14px;line-height:19.6000003814697px;white-space:pre-wrap">https://fedorahosted.org/cluster/wiki/FenceAgentAPI</a>,
but that's not the reason why I'm getting the errors. I
would like to understand what's going on before going ahead
in the hope to get better knowledge on the whole thing.</div>
<div><br>
</div>
<div><br>
</div>
<div>Sorry for the long email, and thank you so much in
advance for the help.</div>
<div><br>
</div>
<div><br clear="all">
<div>Cheers,</div>
</div>
</div>
-- <br>
<div class="gmail_signature">
<div dir="ltr">
<div>
<div dir="ltr"><b><span style="color:rgb(102,102,102)">Tiago
Santos</span></b><br>
</div>
</div>
</div>
</div>
<br>
</div>
<br>
<fieldset class="mimeAttachmentHeader"></fieldset>
<br>
<pre wrap="">_______________________________________________
Users mailing list: <a class="moz-txt-link-abbreviated" href="mailto:Users@clusterlabs.org">Users@clusterlabs.org</a>
<a class="moz-txt-link-freetext" href="http://clusterlabs.org/mailman/listinfo/users">http://clusterlabs.org/mailman/listinfo/users</a>
Project Home: <a class="moz-txt-link-freetext" href="http://www.clusterlabs.org">http://www.clusterlabs.org</a>
Getting started: <a class="moz-txt-link-freetext" href="http://www.clusterlabs.org/doc/Cluster_from_Scratch.pdf">http://www.clusterlabs.org/doc/Cluster_from_Scratch.pdf</a>
Bugs: <a class="moz-txt-link-freetext" href="http://bugs.clusterlabs.org">http://bugs.clusterlabs.org</a>
</pre>
</blockquote>
<br>
</body>
</html>