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توضیحات

Dadd administers daemons.

ویژگی	مقدار
سیستم عامل	-
نام فایل	dadd-0.2.4
نام	dadd
نسخه کتابخانه	0.2.4
نگهدارنده	[]
ایمیل نگهدارنده	[]
نویسنده	Eric Larson
ایمیل نویسنده	eric@ionrock.org
آدرس صفحه اصلی	https://github.com/ionrock/dadd
آدرس اینترنتی	https://pypi.org/project/dadd/
مجوز	BSD

==== Dadd ==== Dadd administers daemons! Dadd is a different kind of process manager. There are many great tools like supervisord and daemontools for managing long running processes. These tools can be configured to add and remove processes as you need to scale. Dadd does something different. Here is what dadd does: 1. Start a process on a host in a temporary directory 2. Daemonize the process 3. On completion of the process, the temporary directory is cleaned up 4. If something failed, dadd notifies and records the logs That is it! Why Dadd? ========= Many distributed computing platforms rely on each worker being released with the code that will be run by the worker. `Celery <http://www.celeryproject.org/>`_ is a good example of this paradigm. The problem with this style is that it is really easy to interrupt your workers with new releases. Dadd starts the process and immediately daemonizes it so that if a dadd worker gets restarted, the work currently being done is not effected. Dadd also makes each process reasonably atomic. It makes no assumptions on the host other than having python installed and virtualenv. When a process is started files can be downloaded and Python dependencies installed in order to run some code. Dadd is not meant to automatically scale a system or provide stats on processes. It is meant to *run* a process as a daemon. It is the responsibility of the process to integrate with other systems. Dadd expects the process to exit on its own. Defining Processes ================== Processes are defined via a spec. A spec is just some JSON that defines a couple keys. Here is an example: :: { "cmd": "python -m mypackage" "download_urls": [ "https://s3.com/mybucket/some_data.json", ], "config": { "db": "postgres://username:pw@dbhost:5432/mydb", }, "python_deps": [ "mypackage" ], "python_cheeseshop": "http://cheese.mydomain.net" } When you want to run a process, you POST the spec to the dadd master server. It will find a host to run it on and send it along to the worker. The worker will then set up a temp directory and allow a `dadd run` process download any files, install a virtualenv along with the `python_deps` and run the command. Any configuration provided in the spec will be written to the temporary directory as JSON. The filename will be available to the process in the environment via the `APP_SETTINGS_JSON` env var. If you need to install packages from a specific cheese shop, you can provide a `python_cheeseshop` in the spec and it will be used when installing any Python dependencies. Dadd Processes ============== Dadd comes with a command line tool that starts the different dadd processes. Dadd Master ----------- Running `dadd master` will start the master server. This maintains the list of processes and hosts. When you try to start a process it will try to find a host. If a host is not found, that host will be removed from the lists of hosts. Dadd Worker ----------- Run `dadd worker` starts up a worker process. The if a master is defined in the config or environment it will register itself so that it can start accepting jobs from the master. This registration happens periodically like a heartbeat in order to keep the workers in sync with the master. Dadd Runner ----------- The `dadd run` command runs a process as a deamon and does the build process prior to running the command. If the master is specified in the config and the spec contains a process ID on the master, it will notify the master of its state as well as upload its log on failure. * Free software: BSD license .. * Documentation: https://dadd.readthedocs.org.

نحوه نصب

نصب پکیج whl dadd-0.2.4:

pip install dadd-0.2.4.whl

نصب پکیج tar.gz dadd-0.2.4:

pip install dadd-0.2.4.tar.gz