I highly recommend using both **Monit AND upstart**.  Upstart makes it easy to deamonize node.js and Monit comes packed with tons of useful app checks including memory usage, http requests, cpu usage, ...

This is an example of the most basic setup you can get.  You could also easily add another monit config (with the same start and stop script) but using the PID file and monitoring process stats.

For the below configuration create a simple local-only request handler in your app that just responds with status 200 if all is well.

## Monit config:
    check host app_name with address 127.0.0.1
    	start &quot;/sbin/start app_name&quot;
    	stop &quot;/sbin/stop app_name&quot;
    	if failed port 80 protocol HTTP
    		request /ok
    		with timeout 5 seconds
    		then restart

## Upstart script (/etc/init/app_name):
    description &quot;app_name&quot;
    
    start on startup
    stop on shutdown
    
    script
        # Node needs HOME to be set
        export HOME=&quot;path/to/node/app&quot;
        
        exec sudo -u nodejs /usr/local/bin/node path/to/node/app/server.js production 2&gt;&gt;/var/log/app_name.error.log &gt;&gt;/var/log/app_name.log
    end script

Given that Upstart just checks the PID, a tool like Monit that makes an actual request will provide you an answer of app sanity more faithfully. A process may happily be running but stuck in some way such that it is not serving requests.

Take the following page:

    &lt;html&gt;
    &lt;head&gt;
    	&lt;script src=&quot;https://ajax.googleapis.com/ajax/libs/jquery/1.4.4/jquery.min.js&quot; type=&quot;text/javascript&quot;/&gt;
    &lt;/head&gt;
    &lt;body&gt;
    	&lt;div class=&quot;hashtag&quot;&gt;#one&lt;/div&gt;
    	&lt;div class=&quot;hashtag&quot;&gt;#two&lt;/div&gt;
    	&lt;form accept-charset=&quot;UTF-8&quot; action=&quot;/home/index&quot; method=&quot;post&quot;&gt;
    		&lt;textarea id=&quot;text-box&quot;/&gt;
    		&lt;input type=&quot;submit&quot; value =&quot;ok&quot; id=&quot;go&quot; /&gt;
    	&lt;/form&gt;

    	&lt;script type=&quot;text/javascript&quot;&gt;
            $(document).ready(function() {

                $(&quot;.hashtag&quot;).click(function() {
                    var txt = $.trim($(this).text());
                    $(&quot;#text-box&quot;).append(txt);
                });

            });
        &lt;/script&gt;
    &lt;/body&gt;
    &lt;/html&gt;

The behavior I would expect, and that I want to achieve is that when I click on one of the *divs* with class `hashtag` their content (&quot;#one&quot; and &quot;#two&quot; respectively) would be appended at the end of the text in *textarea* `text-box`.

This does happen when I click on the hash tags just after the page loads. However when I then also start editing the text in `text-box` manually and then go back to clicking on any of the hashtags they don&#39;t get appended on Firefox. On Chrome the most bizarre thing is happening - all the text I type manually gets replaced with the new hashtag and disappears.

&lt;br&gt;
I probably am doing something very wrong here, so I would appreciate if someone can point out my mistake here, and how to fix that.  

Thanks.

jQuery .append() not appending to textarea after text edited

I&#39;m trying to get Python support in gVim on Windows. Is there a way to accomplish that?

I&#39;m using:

 - Windows XP SP3
 - gVim v. 7.3
 - Python 2.7.13 (ActivePython through Windows Installer binaries)

How to enable Python support in gVim on Windows?

I&#39;m configuring my server to run node.js as a daemon. I&#39;ve setup Upstart to handle startup and shutdown of node, which works wonderfully. The next step is to make sure that node.js is restarted if it dies. A few of the [guides](http://howtonode.org/deploying-node-upstart-monit) have suggested using [Monit](http://mmonit.com/monit/) (or [Fugue](https://github.com/pgte/fugue)) to monitor the process (in Monit&#39;s case by doing an HTTP request to the server and waiting for a response).

I&#39;m happy to use something like Monit or Fugue, but I&#39;m not sure why one wouldn&#39;t (or couldn&#39;t) just use Upstart&#39;s [respawn feature](http://upstart.ubuntu.com/wiki/Stanzas#respawn). I assume Upstart will monitor the PID of the launched process and just kick it off again if it dies. What does Monit or Fugue give you that Upstart doesn&#39;t?

Is there benefit to using Monit instead of a basic Upstart setup?

<p>I'm configuring my server to run node.js as a daemon. I've setup Upstart to handle startup and shutdown of node, which works wonderfully. The next step is to make sure that node.js is restarted if it dies. A few of the <a href="http://howtonode.org/deploying-node-upstart-monit" target="_blank" rel="noopener noreferrer">guides</a> have suggested using <a href="http://mmonit.com/monit/" target="_blank" rel="noopener noreferrer">Monit</a> (or <a href="https://github.com/pgte/fugue" target="_blank" rel="noopener noreferrer">Fugue</a>) to monitor the process (in Monit's case by doing an HTTP request to the server and waiting for a response).</p>
<p>I'm happy to use something like Monit or Fugue, but I'm not sure why one wouldn't (or couldn't) just use Upstart's <a href="http://upstart.ubuntu.com/wiki/Stanzas#respawn" target="_blank" rel="noopener noreferrer">respawn feature</a>. I assume Upstart will monitor the PID of the launched process and just kick it off again if it dies. What does Monit or Fugue give you that Upstart doesn't?</p>


What&#39;s the best strategy for managing third-party Python libraries with Google App Engine?

Say I want to use Flask, a webapp framework. [A blog entry](http://www.franciscosouza.com/2010/08/flying-with-flask-on-google-app-engine/) says to do this, which doesn&#39;t seem right:

    $ cd /tmp/
    $ wget http://pypi.python.org/packages/source/F/Flask/Flask-0.6.1.tar.gz
    $ tar zxf Flask-0.6.1.tar.gz
    $ cp -r Flask-0.6.1/flask ~/path/to/project/
    (... repeat for other packages ...)

There must be a better way to manage third-party code, especially if I want to track versions, test upgrades or if two libraries share a subdirectory. I know that Python can import modules from zipfiles and that _pip_ can work with a wonderful REQUIREMENTS file, and I&#39;ve seen that _pip_ has a `zip` command for use with GAE.

(Note: There&#39;s a handful of similar questions — [1], [2], [3], [4], [5] — but they&#39;re case-specific and don&#39;t really answer my question.)

[1]: https://stackoverflow.com/questions/3899706/including-a-third-party-python-package-in-django-on-app-engine
[2]: https://stackoverflow.com/questions/4530183/python-eggs-on-google-app-engine
[3]: https://stackoverflow.com/questions/4090268/google-app-engine-python-virtualenv-and-mimetypes
[4]: https://stackoverflow.com/questions/2139693/unittest-import-error-with-virtualenv-google-app-engine-django
[5]: https://stackoverflow.com/questions/2743806/best-deployment-strategy-for-python-google-app-engine

How do I manage third-party Python libraries with Google App Engine? (virtualenv? pip?)

I&#39;m trying to understand why it can take from 20-60min to deploy a small application to Azure (using the configuration/package upload method, not from within VS).

I&#39;ve read through [this situation][1] and [this one][2] but I&#39;m still a little unclear - is there a weird non-technology ritual that occurs while the instances are distributing, like somebody over at Microsoft lighting a candle or doing a dance?


  [1]: http://msdn.microsoft.com/en-us/library/ff803362.aspx
  [2]: http://msdn.microsoft.com/en-us/library/ee517255.aspx

Why does Azure deployment take so long?

Let&#39;s say we have an application with a deployment target set to 3.0 and we want to raise the deployment target to 3.2.  Normally, the App Store won&#39;t let the App be installed on devices with an IOS version less then this, but what about devices which already had the App installed prior to the update?  Will they see the update but won&#39;t be able to install, will they just not see the update or, heavens forbid, will be able to install and the app just won&#39;t start?

I searched everywhere for this, but I can&#39;t find anything about raising the minimum OS version for an app update.

Thanks!

Raising minimum iOS Deployment Target Version for App Update

**Note**

*Given this OP was written about two years ago, rather than ask the same question again, I am wondering if step-by-step instructions exist, so that I can integrate a Noir or other Clojure web application into Apache, whether it&#39;s Jetty, Tomcat, or something else. Similar instructions exist for Django, and I think I understand that Python is being run in Django&#39;s case as an engine rather than a ring framework, so things are more complicated with Clojure web applications.* 

**End Note**

I&#39;m deeply in love with Clojure, and Compojure seems like a neat web framework.

But it all fell apart when I wanted to deploy my application on a regular application server like Tomcat as a WAR. I actually had to write custom Ring handlers for static files and resources that would work on both local Jetty and Tomcat because the stock handlers didn&#39;t, and I had to prepend the context root everywhere manually.

I am negatively amazed that I had to write all this code to create the simplest web application conceivable that would run on both Jetty and Tomcat. I have only three possible explanations for this:

1. Nobody uses Clojure/Compojure for anything other than local development with Jetty, i.e. in production
2. Everybody deploys Clojure/Compojure apps on a dedicated Jetty without context root (LIke people do it with Node.js apps)
3. There is a really simple way to circumvent the problems I ran into I wasn&#39;t aware of

Which of these is in your opinion the case? Or is it something else?

**Edit:**

Please note that creating a war file is a no-brainer with Maven/Leiningen and not what I mean. I&#39;m wondering that I have to write so much code to make Compojure work with Tomcat, basic stuff like static file serving and context root awareness that *should* work out of the box.

How To Integrate Clojure Web Applications in Apache

I&#39;m developing a deployment script for my git project and I just started using tags. I&#39;ve added a new tag called `v2.0`:

    git tag -a v2.0 -m &quot;Launching version 2.0&quot;

And I&#39;ve pushed this tag to the remote repository

    git push --tags

When I try to execute the deployment script and check out the `v2.0` tag I get this message:

&gt; *You are in &#39;detached HEAD&#39; state. You can look around, make experimental changes and commit them, and you can discard any commits
&gt; you make in this state without impacting any branches by performing
&gt; another checkout. If you want to create a new branch to retain commits
&gt; you create, you may do so (now or later) by using -b with the checkout
&gt; command again. Example:   git checkout -b new_branch_name HEAD is now
&gt; at*

Is that normal? The repository is in limbo because if I do:

    git branch

I get this output:

    * (no branch)
      master

Sorry if this is obvious but I couldn&#39;t figure it out.

Checking out Git tag leads to &quot;detached HEAD state&quot;

I want to ping a server from my node.js app.

Is that doable?

Thanks

How to &quot;Ping&quot; from a Node.js app?

How to best send additional data upon socket connection?

Client:

    socket.on(&#39;connect&#39;,function(){ 
    //I&#39;d like set some values and pass them up to the node server.
    });

Node.js Server:

    io.on(&#39;connection&#39;, function(client){
    //I&#39;d like to get the data here.
    });

For example sending a user name or email address etc.

Send additional data on socket connection

I am trying to use Socket.IO in Node.js, and am trying to allow the server to give an identity to each of the Socket.IO clients.  As the socket code is outside the scope of the http server code, it doesn&#39;t have easy access to the request information sent, so I&#39;m assuming it will need to be sent up during the connection.  What is the best way to

1) get the information to the server about who is connecting via Socket.IO

2) authenticate who they say they are (I&#39;m currently using Express, if that makes things any easier)

Socket.IO Authentication

I&#39;m using Node.js and wanting to incorporate CoffeeScript into my workflow. I have two use-cases:

 1. I want to be able to write JavaScript files which `require()` CoffeeScript modules
 2. I want to be able to load CoffeeScript modules from within the node REPL

**For case #1:** I can just compile from `.coffee` to `.js` and `require()` the `.js` module, as a workaround. 

**For case #2:** Right now I&#39;m `eval()`ing the output of `coffee-script.compile()`.

Is there a better, more unified way to do this?

require()&#39;ing a CoffeeScript file from a JavaScript file or REPL

I&#39;m trying to learn about new usages of javascript as a serverside language and as a functional language. Few days ago I heard about node.js and express framework. Then I saw about underscore.js as a set of utility functions. I saw [this question on stackoverflow
][1]. It says we can use underscore.js as a template engine. anybody know good tutorials about how to use underscore.js for templating, especially for biginners who have less experience with advanced javascript. Thanks 

  [1]: https://stackoverflow.com/questions/1787716/is-there-a-template-engine-for-node-js

How to use underscore.js as a template engine?

I&#39;m running Ubuntu 11.10 and have run `sudo apt-get install jenkins` to install Jenkins on this system.

I&#39;ve seen some tutorials on how to setup a reverse proxy (Apache, Nginx, etc), however this is a VM dedicated for just jenkins and I&#39;d like keep it as lean as possible while having jenkins running on port 80.

I&#39;ve found the upstart config in `/etc/init/jenkins.conf` and modified the port to 80 `env HTTP_PORT=80`

When I start jenkins via `service jenkins start`, `ps` reveals that it runs for a few seconds then terminates.

Is this because jenkins is running as the `jenkins` user on a privileged port? If so, how do I fix this? Any other ideas a welcome.

Here is the upstart config:

    description &quot;jenkins: Jenkins Continuous Integration Server&quot;
    author &quot;James Page &lt;james.page@ubuntu.com&gt;&quot;
    
    start on (local-filesystems and net-device-up IFACE!=lo)
    stop on runlevel [!2345]
    
    env USER=&quot;jenkins&quot;
    env GROUP=&quot;jenkins&quot;
    env JENKINS_LOG=&quot;/var/log/jenkins&quot;
    env JENKINS_ROOT=&quot;/usr/share/jenkins&quot;
    env JENKINS_HOME=&quot;/var/lib/jenkins&quot;
    env JENKINS_RUN=&quot;/var/run/jenkins&quot;
    env HTTP_PORT=80
    env AJP_PORT=-1
    env JAVA_OPTS=&quot;&quot;
    env JAVA_HOME=&quot;/usr/lib/jvm/default-java&quot;
    
    limit nofile 8192 8192
    
    pre-start script
        test -f $JENKINS_ROOT/jenkins.war || { stop ; exit 0; }
        $JENKINS_ROOT/bin/maintain-plugins.sh 	
        mkdir $JENKINS_RUN &gt; /dev/null 2&gt;&amp;1  || true
        chown -R $USER:$GROUP $JENKINS_RUN || true
    end script
    
    script
        JENKINS_ARGS=&quot;--webroot=$JENKINS_RUN/war --httpPort=$HTTP_PORT --ajp13Port=$AJP_PORT&quot;
        exec daemon --name=jenkins --inherit --output=$JENKINS_LOG/jenkins.log --user=$USER \
            -- $JAVA_HOME/bin/java $JAVA_OPTS -jar $JENKINS_ROOT/jenkins.war $JENKINS_ARGS \
            --preferredClassLoader=java.net.URLClassLoader
    end script



How to configure Jenkins to run on port 80

Im looking for something better than ``sudo restart projectname`` every time I issue a ``git pull origin master``, which pulls down my latest changes to a Django project. This ``restart`` command, I believe, is related to Upstart, which I use to start/top my Gunicorn server process.

This restart causes a brief outage. Users hitting the web server (nginx) will get a 500, because Gunicorn is still restarting. In fact, it seems to restart instantly, but it takes a few seconds for pages to load.

Any ideas on how to make this seamless? Ideally, I&#39;d like to issue my ``git pull`` and Gunicorn reloads automatically.

Content Type	Original Author	Original Content on Stackoverflow
Question	James Gregory	View Question on Stackoverflow
Solution 1 - Deployment	Daniel Beardsley	View Answer on Stackoverflow
Solution 2 - Deployment	flq	View Answer on Stackoverflow

Is there benefit to using Monit instead of a basic Upstart setup?

Deployment Problem Overview

Deployment Solutions

Solution 1 - Deployment

Monit config:

Upstart script (/etc/init/app_name):

Solution 2 - Deployment

How to enable Python support in gVim on Windows?

jQuery .append() not appending to textarea after text edited

Attributions