I develop my python applications with Pycharm and I love it. Recently, I discovered grunt and the superb watch-action of grunt.
I want to start grunt watch, and maybe some other applications, in the background when I start my Django server using run. I know, how to start applications before launch but Pycharm waits for their exit before starting the django server. So this is not the right way, because I need the application to run in the background.
Any ideads how to achieve this?
You can setup an external tool as a launcher for the background task.
I am currently on mac, hopefully you can adapt the idea with some dos commands. Let's assume the background task can be started from task.py
Step 1: Create a "launcher script", saved as bg_run.sh in this example. Note the fork instruction & to run the task in a new process.
run_task() {
python /Path/To/Task/task.py
}
run_task &
Step 2: Create an external tool in Preferences | Tools | External Tools to run that script.
Step 3: Add that external tool to run before launch in the Run/Debug Configurations.
Note: The question on how to kill that background task is left open ;)
Related
I have a batch job that i want to deploy from Teamcity to several servers,
to access several servers i use Winexe tool.
the batch is running but i can't see the session because it's started from teamcity,
but i can see that its running when looking at the process list.
My issue is that sometimes this job is having some errors,
which are being displayed on the cmd window when i run it manualy
but since i'm running it through TeamCity i can't see the CMD window so i can't see the error.
My question is:
Is there any way to open the CMD through teamcity so it will open and displayed on the desktop when i access the server as the same user?
note: bare in mind that i need to deploy it to several servers so i can't install several
agents via ZIP File.
So I found kind of a work-around to solve this problem,
I created a schedule task in windows that will run my batch.
when creating this task you need to set those settings:
1.) Run as: the user name that TeamCity is logging in.
2.) check the Run only if logged on check box.
3.) in the security tab give the user you use full permitions.
In order to run the schedule task you need to run this batch script:
Schtasks.exe /Run /TN name_of_schedule_task
We have a project with different processes, and run it by calling erl -pa ebin, mymodule_supervisor:start_link().
We have set up an ubuntu instance on Amazon EC2. Being new to this, how can we run the project remotely, so we can close the connection and the project will continue to run?
We can run the Erlang shell in the background, but we can't our project on it. It would be perfect to see an example.
Method 1: You could build a release package from your code. If done right, this will embed a complete Erlang system (along with your application and its dependencies) in an easily distributable tar file. Using an automatically generated script the node can then be started as a daemon, running in the background even after you close your shell.
A good way to get started is to use Rebar, which already supports release handling out of the box.
Method 2: Use tmux or screen (both easily installed on Ubuntu) to start your node and detach the session. If you choose tmux, the following should work:
Start tmux simply by running tmux from a shell.
From within tmux, start your node with the erl command as before.
Detach your session using Ctrl-b followed by d. Exit your shell. The node should still be running.
The "proper" way to start the supervisor is to call its start_link function from within the start function of your Erlang application.
Does anyone know a good method to debug server side code?
I tried enable Node.js debug then use node-inspector but it does not show any of my code.
I end up using console.log but this is very inefficient.
Update: I found the following procedure works on my Linux machine:
When you run Meteor, it will spawn two processes
process1: /usr/lib/meteor/bin/node /usr/lib/meteor/app/meteor/meteor.js
process2: /usr/lib/meteor/bin/node /home/paul/codes/bbtest_code/bbtest02/.meteor/local/build/main.js --keepalive
You need to send kill -s USR1 on process2
Run node-inspector and you can see your server code
On my first try, I modify the last line on meteor startup script in /usr/lib/meteor/bin/meteor to
exec "$DEV_BUNDLE/bin/node" $NODE_DEBUG "$METEOR" "$#"
and run NODE_DEBUG=--debug meteor on command prompt. This only put --debug flag on process1 so I only see meteor files on node-inspector and could not find my code.
Can someone check this on Windows and Mac machine?
In Meteor 0.5.4 this has become a lot easier:
First run the following commands from the terminal:
npm install -g node-inspector
node-inspector &
export NODE_OPTIONS='--debug-brk'
meteor
And then open http://localhost:8080 in your browser to view the node-inspector console.
Update
Since Meteor 1.0 you can just type
meteor debug
which is essentially a shortcut for the above commands, and then launch node inspector in your browser as mentioned.
Update
In Meteor 1.0.2 a console or shell has been added. It may come in handy to output variables and run commands on the server:
meteor shell
Meteor apps are Node.js apps. When running a Meteor app with the meteor [run] command, you can configure the NODE_OPTIONS environment variable to start node in debug mode.
Examples of NODE_OPTIONS environment variable values:
--debug
--debug=47977 - specify a port
--debug-brk - break on the first statement
--debug-brk=5858 - specify a port and break on the first statement
If you export NODE_OPTIONS=--debug, all meteor command run from the same shell will inherit the environment variable. Alternatively, you can enable debugging just for one run, with NODE_OPTIONS="--debug=47977" meteor.
To debug, run node-inspector in a different shell, then go to http://localhost:8080/debug?port=<the port you specified in NODE_OPTIONS>, regardless of what node-inspector tells you to run.
To start node.js in debug mode, I did it this way:
open /usr/lib/meteor/app/meteor/run.js
before
nodeOptions.push(path.join(options.bundlePath, 'main.js'));
add
nodeOptions.push('--debug');
Here are additional practical steps for your to attach debugger eclipse:
use '--debug-brk' instead of '--debug' here, because it's easier for me to attach node.js using eclipse as debugger.
add 'debugger;' in the code where you want to debug.(I prefer this way personally)
run meteor in console
attach to node.js in eclipse(V8 tools, attach to localhost:5858)
run, wait for debugger to be hit
when you start meteor in your meteor app folder, you'll see that "debugger listening on port 5858" in console.
On Meteor 1.0.3.1 (update to Sergey.Simonchik answer)
Start your server with meteor run --debug-port=<port-number>
Point browser to http://localhost:6222/debug?port=<port-number>
Where <port-number> is a port you specify.
In your code add a debugger; where you want to set your break point.
Depending on where debugger; is invoked, it will either break on your client or server browser window with inspector opened.
I like to set breakpoints via a GUI. This way I don't have to remember to remove any debugging code from my app.
This is how I managed to do it server side for my local meteor app:
meteor debug
start your app this way.
Open Chrome to the address it gives you. You MAY need to install https://github.com/node-inspector/node-inspector (it might come bundled with Meteor now? not sure)
You'll see some weird internal meteor code (not the app code you wrote). Press play to run the code. This code simply starts up your server to listen for connections.
Only after you press play you'll see a new directory in your debugger folder structure called "app". In there are your meteor project files. Set a breakpoint in there one the line you want.
Open the local address of your app. This will run your server side code and you you should be able to hit your breakpoint!
Note: you have to reopen the inspector and go through this process again each time your app restarts!
As of Meteor 1.0.2 probably the best way for server-side debugging is directly via the new built-in shell: with running server run meteor shell. More info here: https://www.meteor.com/blog/2014/12/19/meteor-102-meteor-shell
I am not sure why it was not working for you.
I am able to use it by following steps on console (Mac).
$ ps
$ kill -s USR1 *meteor_node_process_id*
$ node-inspector &
Above steps are mentioned on https://github.com/dannycoates/node-inspector. It is for attaching node-inspector to running node process.
I wrote a small meteor package called meteor-inspector which simplifies the use of node-inspector to debug meteor apps. It internally manages the lifecycle of node-inspector and hence, the user does not need to restart the debugger manually after some files have changed.
For more details and concrete usage instructions take a look at https://github.com/broth-eu/meteor-inspector.
for meteor 1.3.5.2, run
meteor debug --debug-port 5858+n
n is a non-zero number, this will cause node-inspector use 8080+n as web port.
WebStorm, the powerful IDE free for open source developers, makes it much easier to debug server-side.
I've tested it on Windows, and the configuration was painless - see my answer.
A inspector that solve my issues is meteor server console. Here is the process I followed to install it:
In your project folder, add the smart package server-eval:
mrt add server-eval
For Meteor 1.0:
meteor add gandev:server-eval
Restart meteor.
Download crx Chrome extension file from here.
Open extensions page in Chrome and drag crx file to extensions page.
Restart Chrome.
Check the web inspector out to eval server side code:
In comparison with node-inspector, I have a clearer output.
If you prefer to use nodeJS' official debugger you can call NODE_OPTIONS='--debug' meteor and then (on a different shell) node debug localhost:5858.
Normally, we start a pylons web application via command line:
pastser serve --reload development.ini
I wanna know can we start it programmaticly? In a python script file?
I want this because I can start it in IDE, and use the debugger
#!/usr/bin/env python
from paste.script.serve import ServeCommand
ServeCommand("serve").run(["--reload", "development.ini"])
...some IDEs (e.g. pydev) won't support breakpoints in debug mode if you have --reload enabled. Simply remove it from the list you pass to .run() to disable the reload functionality and enable IDE breakpoints.
That sounds like a job for a shell script - you could launch it from a Python script, but a shell script is likely to be cheaper in terms of mental effort.
In order to run one application, a batch file has to be kicked off (which does things like start Jetty, display live logs, etc). The application will work only if this batch file is running. I am hence forced to have this batch file running and not logout from the Windows server.
Can this batch file be run as a service? I am experimenting with one of the suggestions from a similar question.
NSSM is totally free and hyper-easy, running command prompt / terminal as administrator:
nssm install "YourCoolServiceNameLabel"
then a dialog will appear so you can choose where is the file you want to run.
to uninstall
nssm remove "YourCoolServiceNameLabel"
There's a built in windows cmd to do this: sc create. Not as fancy as nssm, but you don't have to download an additional piece of software.
sc create "ServiceName" start= demand displayname= "DisplayName" binpath= [path to .bat file]
Note
start=demand means you must start the service yourself. Options include: boot, system, auto, demand, disabled, delayed-auto
whitespace is required after =
I did encounter an error on service start that the service did not respond in a timely manner, but it was clear the service had run the .bat successfully. Haven't dug into this yet but this thread experienced the same thing and solved it using nssm to install the service.
No need for extra software. Use the task scheduler -> create task -> hidden. The checkbox for hidden is in the bottom left corner. Set the task to trigger on login (or whatever condition you like) and choose the task in the actions tab. Running it hidden ensures that the task runs silently in the background like a service.
Note that you must also set the program to run "whether the user is logged in or not" or the program will still run in the foreground.
On Windows 2019 Server, you can run a Minecraft java server with these commands:
sc create minecraft-server DisplayName= "minecraft-server" binpath= "cmd.exe /C C:\Users\Administrator\Desktop\rungui1151.lnk" type= own start= auto
The .lnk file is a standard windows shortcut to a batch file.
--- .bat file begins ---
java -Xmx40960M -Xms40960M -d64 -jar minecraft_server.1.15.1.jar
--- .bat file ends ---
All this because:
service does not know how to start in a folder,
cmd.exe does not know how to start in a folder
Starting the service will produce "timely manner" error, but the log file reveals the server is running.
If you need to shut down the server, just go into task manager and find the server java in background processes and end it, or terminate the server from in the game using the /stop command, or for other programs/servers, use the methods relevant to the server.
As Doug Currie says use RunAsService.
From my past experience you must remember that the Service you generate will
have a completely different set of environment variables
have to be carefully inspected for rights/permissions issues
might cause havoc if it opens dialogs asking for any kind of input
not sure if the last one still applies ... it was one big night mare in a project I worked on some time ago.
While it is not free (but $39), FireDaemon has worked so well for me I have to recommend it. It will run your batch file but has loads of additional and very useful functionality such as scheduling, service up monitoring, GUI or XML based install of services, dependencies, environmental variables and log management.
I started out using FireDaemon to launch JBoss application servers (run.bat) but shortly after realized that the richness of the FireDaemon configuration abilities allowed me to ditch the batch file and recreate the intent of its commands in the FireDaemon service definition.
There's also a SUPER FireDaemon called Trinity which you might want to look at if you have a large number of Windows servers on which to manage this service (or technically, any service).
Since NSSM is no longer maintained, you can consider using WinSW. It has binaries that would work with or without .Net.
Basically you create an XML file and then install it. Here is a sample of a minimal XML:
<service>
<!-- ID of the service. It should be unique across the Windows system-->
<id>myapp</id>
<!-- Path to the executable, which should be started -->
<!-- CAUTION: Don't put arguments here. Use <arguments> instead. -->
<executable>%BASE%\myExecutable.exe</executable>
</service>
And then you can install and start it:
winsw install myapp.xml
winsw start myapp.xml
Install NSSM and run the .bat file as a windows service.
Works as expected
My easest way is using opensource svcbatch (https://github.com/mturk/svcbatch/) as wrapper of CMD(BAT) in sc :
sc create myservice binPath= ""%cd%\svcbatch.exe" myservice.bat"