{"id":1216,"date":"2009-12-14T23:22:08","date_gmt":"2009-12-14T22:22:08","guid":{"rendered":"http:\/\/www.devco.net\/?p=1216"},"modified":"2010-08-17T12:25:13","modified_gmt":"2010-08-17T11:25:13","slug":"exim_mcollective_and_speed","status":"publish","type":"post","link":"https:\/\/www.devco.net\/archives\/2009\/12\/14\/exim_mcollective_and_speed.php","title":{"rendered":"Exim, MCollective and speed"},"content":{"rendered":"<p>Usually when I describe <a href=\"http:\/\/marionette-collective.org\/\">mcollective<\/a> to someone they generally think its nice and all but the infrastructure to install is quite a bit and so ssh parallel tools like cap seems a better choice.  They like the discovery and stuff but it&#8217;s not all that clear. <\/p>\n<p>I have a different end-game in mind than just restarting services, and I&#8217;ve made a video to show just how I manage a cluster of Exim servers using mcollective.  This video should give you some ideas about the possibilities that the architecture I chose brings to the table and just what it can enable.<\/p>\n<p>While watching the video please note how quick and interactive everything is, then keep in mind the following while you are seeing the dialog driven app:<\/p>\n<ul>\n<li>I am logged in via SSH from UK to Germany into a little VM there<\/li>\n<li>The mcollective client talks to a Germany based ActiveMQ<\/li>\n<li>The 4 mail servers in the 2nd part of the demo are based 2 x US, 1 x UK and 1 x DE<\/li>\n<li>I have ActiveMQ instances in each of the above countries clustered together using the technique previous <a href=\"http:\/\/www.devco.net\/archives\/2009\/11\/10\/activemq_clustering.php\">documented here<\/a>.<\/li>\n<\/ul>\n<p>Here&#8217;s the video then, as before I suggest you hit the full screen link and watch it that way to see what&#8217;s going on.<\/p>\n<p><center><br \/>\n<object classid='clsid:d27cdb6e-ae6d-11cf-96b8-444553540000' codebase='http:\/\/download.macromedia.com\/pub\/shockwave\/cabs\/flash\/swflash.cab#version=9,0,115,0' width='560' height='345'><param name='movie' value='http:\/\/screenr.com\/Content\/assets\/screenr_1116090935.swf' \/><param name='flashvars' value='i=33849' \/><param name='allowFullScreen' value='true' \/><embed src='http:\/\/screenr.com\/Content\/assets\/screenr_1116090935.swf' flashvars='i=33849' allowFullScreen='true' width='560' height='345' pluginspage='http:\/\/www.macromedia.com\/go\/getflashplayer'><\/embed><\/object><br \/>\n<\/center><br \/>\n<\/p>\n<p>This is the end game, I want a framework to enable this kind of tool on Unix CLI &#8211; complete with pipes as you&#8217;d expect &#8211; things like the dialog interface you see here, on the web, in general shell scripts and in nagios checks like with cucumber-nagios, all sharing a API and all talking to a collective of servers as if they are one.  I want to make building these apps easy, quick and fun.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Usually when I describe mcollective to someone they generally think its nice and all but the infrastructure to install is quite a bit and so ssh parallel tools like cap seems a better choice. They like the discovery and stuff but it&#8217;s not all that clear. I have a different end-game in mind than just [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_et_pb_use_builder":"","_et_pb_old_content":"","footnotes":""},"categories":[1],"tags":[121,82,78],"_links":{"self":[{"href":"https:\/\/www.devco.net\/wp-json\/wp\/v2\/posts\/1216"}],"collection":[{"href":"https:\/\/www.devco.net\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.devco.net\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.devco.net\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.devco.net\/wp-json\/wp\/v2\/comments?post=1216"}],"version-history":[{"count":15,"href":"https:\/\/www.devco.net\/wp-json\/wp\/v2\/posts\/1216\/revisions"}],"predecessor-version":[{"id":1712,"href":"https:\/\/www.devco.net\/wp-json\/wp\/v2\/posts\/1216\/revisions\/1712"}],"wp:attachment":[{"href":"https:\/\/www.devco.net\/wp-json\/wp\/v2\/media?parent=1216"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.devco.net\/wp-json\/wp\/v2\/categories?post=1216"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.devco.net\/wp-json\/wp\/v2\/tags?post=1216"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}