{"id":15,"date":"2006-04-24T13:36:19","date_gmt":"2006-04-24T21:36:19","guid":{"rendered":"http:\/\/blog.danielparnell.com\/?p=15"},"modified":"2006-04-24T16:53:07","modified_gmt":"2006-04-25T00:53:07","slug":"multiple-ruby-on-rails-applications-under-different-folders-served-by-apache-on-mac-os-x","status":"publish","type":"post","link":"https:\/\/blog.danielparnell.com\/?p=15","title":{"rendered":"Multiple ruby on rails applications under different folders served by Apache on Mac OS X"},"content":{"rendered":"

I’ve been doing quite a bit of development recently using Ruby on Rails under Mac OS X. Unfortunately it can be a little tricky to get rails apps deployed nicely under Apache. The machine I’m using is an aging G4 with very little RAM so running rails apps in CGI mode is <\/span>very<\/span> slow<\/span>! Initially I tried FastCGI, but I found it to be unreliable :(\u00c2\u00a0
After a bit of looking about on the net I came across SCGI ( <\/span>http:\/\/www.mems-exchange.org\/software\/scgi\/<\/a><\/span> ) and some code to use it to run rails. apps ( <\/span>http:\/\/www.zedshaw.com\/projects\/scgi_rails\/<\/a><\/span> <\/span>).\u00c2\u00a0
Installing these pieces is pretty straight forward\u00c2\u00a0
\u00c2\u00a0
1. download and install the SCGI apache module\u00c2\u00a0
2. install the cmdparse gem (<\/span>sudo gem install cmdparse<\/span>)\u00c2\u00a0
3. install the highline gem (<\/span>sudo gem install highline<\/span>)\u00c2\u00a0
4. install the SCGI rails runner\u00c2\u00a0
5. configure your rails apps for SCGI by executing <\/span>scgi_ctrl config<\/span> in each rails app root folder\u00c2\u00a0
\u00c2\u00a0
Make sure that each of your rails apps has a different port selected in the config\/scgi.yaml file\u00c2\u00a0
\u00c2\u00a0
Next we need to update <\/span>the Apache config file \/etc\/httpd\/httpd.conf<\/span>\u00c2\u00a0
\u00c2\u00a0
<\/span>LoadModule scgi_module libexec\/httpd\/mod_scgi.so\u00c2\u00a0
AddModule mod_scgi.c\u00c2\u00a0
<\/span>\u00c2\u00a0
<\/span><IfModule mod_scgi.c>\u00c2\u00a0
  # matches locations with a dot following at least one more characters, that is,\u00c2\u00a0
  # things like *,html, *.css, *.js, which should be delivered directly from\u00c2\u00a0
  # the filesystem\u00c2\u00a0
  <locationmatch \\..+$>\u00c2\u00a0
    # don’t handle those with SCGI\u00c2\u00a0
    SCGIHandler Off\u00c2\u00a0
  <\/locationmatch> \u00c2\u00a0
<\/IfModule>\u00c2\u00a0
<\/span>\u00c2\u00a0
<\/span>Alias \/app1 “\/Library\/WebServer\/RailsApps\/app1\/public”\u00c2\u00a0
SCGIMount \/tbgmon 127.0.0.1:9999\u00c2\u00a0
<directory “\/Library\/WebServer\/RailsApps\/app1\/public”>\u00c2\u00a0
  Options +FollowSymLinks\u00c2\u00a0
  Order allow,deny\u00c2\u00a0
  allow from all\u00c2\u00a0
<\/directory>\u00c2\u00a0
\u00c2\u00a0
Alias \/app2 “\/Library\/WebServer\/RailsApps\/app2\/public”\u00c2\u00a0
SCGIMount \/app2 127.0.0.1:9998\u00c2\u00a0
<Directory “\/Library\/WebServer\/RailsApps\/app2\/public”>\u00c2\u00a0
  Options +FollowSymLinks\u00c2\u00a0
  Order allow,deny\u00c2\u00a0
  Allow from all\u00c2\u00a0
<\/Directory><\/span>\u00c2\u00a0
<\/span>\u00c2\u00a0
Now we start each of the SCGI server processes by running the <\/span>scgi_ctrl start<\/span> command in each rails app root folder, bounce apache using <\/span>sudo apachectrl graceful<\/span> and the rails apps should be up and running from <\/span>http:\/\/localhost\/app1\/<\/a><\/span> and <\/span>http:\/\/localhost\/app2\/<\/a><\/span>\u00c2\u00a0
\u00c2\u00a0
That is only half of the story however. We need to have the SCGI server processes start when the machine boots. The way to do this under Mac OS X is to create a startup item. A startup item consists of a couple of files in a folder under \/Library\/StartupItems. One is a .plist file and the other is a shell script.\u00c2\u00a0
\u00c2\u00a0
Create a folder called SCGI under \/Library\/StartupItems and then create the file StartupParameters.plist with the following content\u00c2\u00a0
\u00c2\u00a0
<\/span>{\u00c2\u00a0
  Description = “SCGI”;\u00c2\u00a0
  Provides = (“SCGI”);\u00c2\u00a0
  Uses = (“Web Server”);\u00c2\u00a0
}<\/span>\u00c2\u00a0
\u00c2\u00a0
Next create a file called SCGI and paste in this text\u00c2\u00a0
\u00c2\u00a0
<\/span>#!\/bin\/sh\u00c2\u00a0
\u00c2\u00a0
##\u00c2\u00a0
# SCGI\u00c2\u00a0
##\u00c2\u00a0<\/p>\n

. \/etc\/rc.common<\/span>\u00c2\u00a0
\u00c2\u00a0
StartService ()\u00c2\u00a0
{\u00c2\u00a0
\u00c2\u00a0\u00c2\u00a0\u00c2\u00a0\u00c2\u00a0echo “Starting SCGI servers”\u00c2\u00a0
\u00c2\u00a0\u00c2\u00a0\u00c2\u00a0\u00c2\u00a0\u00c2\u00a0
\u00c2\u00a0\u00c2\u00a0\u00c2\u00a0\u00c2\u00a0pushd \/Library\/WebServer\/RailsApps\/app1\/ > \/dev\/null ; \/usr\/bin\/scgi_ctrl start ; popd > \/dev\/null\u00c2\u00a0
\u00c2\u00a0\u00c2\u00a0\u00c2\u00a0\u00c2\u00a0pushd \/Library\/WebServer\/RailsApps\/app2\/ > \/dev\/null ; \/usr\/bin\/scgi_ctrl start ; popd > \/dev\/null\u00c2\u00a0
}\u00c2\u00a0
\u00c2\u00a0
StopService ()\u00c2\u00a0
{\u00c2\u00a0
\u00c2\u00a0\u00c2\u00a0\u00c2\u00a0\u00c2\u00a0echo “Stopping SCGI servers”\u00c2\u00a0
\u00c2\u00a0\u00c2\u00a0\u00c2\u00a0\u00c2\u00a0ps ax | grep scgi | grep ruby | awk ‘{print $1}’ | xargs kill\u00c2\u00a0
}\u00c2\u00a0
\u00c2\u00a0
RestartService ()\u00c2\u00a0
{\u00c2\u00a0
\u00c2\u00a0\u00c2\u00a0\u00c2\u00a0\u00c2\u00a0StopService\u00c2\u00a0
\u00c2\u00a0\u00c2\u00a0\u00c2\u00a0\u00c2\u00a0StartService\u00c2\u00a0
}\u00c2\u00a0
\u00c2\u00a0
RunService “$1”<\/span>\u00c2\u00a0
\u00c2\u00a0
According to the SCGI rails runner docs there is an option to choose the root folder of the rails app, but I couldn’t get it to work. I suppose I should contact the author about it one of these days ;)\u00c2\u00a0
\u00c2\u00a0
Now with any luck the next time your machine reboots the SCGI servers should be started and Apache should forward requests on to your rails apps.\u00c2\u00a0
<\/span><\/p>\n","protected":false},"excerpt":{"rendered":"

I’ve been doing quite a bit of development recently using Ruby on Rails under Mac OS X. Unfortunately it can be a little tricky to get rails apps deployed nicely under Apache. The machine I’m using is an aging G4 with very little RAM so running rails apps in CGI mode is very slow! Initially … <\/p>\n

Continue reading “Multiple ruby on rails applications under different folders served by Apache on Mac OS X”<\/span><\/a><\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"jetpack_post_was_ever_published":false,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":false,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2}},"categories":[3,8,6],"tags":[],"class_list":["post-15","post","type-post","status-publish","format-standard","hentry","category-mac-os-x","category-rails","category-web","entry"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"","jetpack_shortlink":"https:\/\/wp.me\/p561S3-f","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/blog.danielparnell.com\/index.php?rest_route=\/wp\/v2\/posts\/15","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/blog.danielparnell.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/blog.danielparnell.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/blog.danielparnell.com\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/blog.danielparnell.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=15"}],"version-history":[{"count":0,"href":"https:\/\/blog.danielparnell.com\/index.php?rest_route=\/wp\/v2\/posts\/15\/revisions"}],"wp:attachment":[{"href":"https:\/\/blog.danielparnell.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=15"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blog.danielparnell.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=15"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blog.danielparnell.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=15"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}