talook

Single web front end for jsonstats.

Features

• Only requires Python (w/ simplejson if 2.4 or 2.5)
• Python 2.4+ compatible
• Simple filesystem based caching
• Access and application logging
• JSON based configuration
• Bookmarkable hosts
• host and environment REST endpoints
• Ajaxy
• Unit tested
• Optional reload of standalone server on configuration update

Unittests

Use ./setup.py test from the main directory to execute unittests.

Configuration

Configuration of the server is done in JSON and is by default kept in the current directories config.json file. You can override the location by setting TALOOK_CONFIG_FILE environment variable or using the -c/--config switch on the all in one server.

Name	Type	Required	Value
cachedir	str	False	Full path to the cache directory. If this is empty the cache is disabled
cachetime	dict	False	kwargs for Python's datetime.timedelta 1
endpoint	str	True	Endpoint url to pull json data from with a %s placeholder for hostname
extranotes	str	False	URL of external page with more info about a host with a %s placeholder for hostname
hosts	dict	True	hostname: environment pairs
logdir	str	True	Full path to the log directory
staticdir	str	True	Full path to the static files directory
templatedir	str	True	Full path to the templates directory
timeout	int	False	Seconds a request will wait before timing out (default: 5)

Example Configurations

Without Cache

{
    "hosts": {
        "somehost.example.com": "prod",
        "another.host.example.com": "prod",
        "aqasystem.example.com": "qa",
        "127.0.0.1": "dev"
    },

    "extranotes": "http://munin.mysite.com/%s.html",
    "endpoint": "http://%s:8008/",
    "templatedir": "/var/www/talook/templates/",
    "logdir": "/var/logs/talook/",
    "staticdir": "/srv/www/talook/static/",
    "timeout": 3
}

With Cache

{
    "hosts": {
        "somehost.example.com": "prod",
        "another.host.example.com": "prod",
        "aqasystem.example.com": "qa",
        "127.0.0.1": "dev"
    },

    "extranotes": "http://munin.mysite.com/%s.html",
    "endpoint": "http://%s:8008/",
    "templatedir": "/var/www/talook/templates/",
    "cachedir": "/var/cache/talook/",
    "cachetime": {"hours": 1},
    "logdir": "/var/logs/talook/",
    "staticdir": "/srv/www/talook/static/",
    "timeout": 3
}

URLS

/

Index page. What a user will interact with.

/hosts.json

Returns JSON data listing all configured hosts.

/envs.json

Returns JSON data listing all configured environments.

/host/$HOSTNAME.json

Returns stats for a specific host in JSON format. Cache is used if available.

/statict/$FILENAME

Returns a static file from the static directory.

/#!/host/$HOSTNAME

Returns stats for a specific host in the UI. This is helpful for bookmarking hosts.

Logging

There are two log file which are produced by a running instance.

• talook_access.log: Access log similar to apache's access log.
• talook_app.log: Application level logging which logs some logic results.

Running

Simple

1. Edit the configuration file
2. Check to see what options you want to use with --help
3. python server.py --listen 0.0.0.0 --port 8008 --config ./config.json

Standalone Server Options

$ ./server.py --help
Usage: server.py [options]

Options:
  -h, --help            show this help message and exit
  -c CONFIG, --config=CONFIG
                        Config file to read (Default: config.json
  -p PORT, --port=PORT  Port to listen on. (Default: 8080)
  -l LISTEN, --listen=LISTEN
                        Address to listen on. (Default: 0.0.0.0)
  -r, --reload          Enable reloading on config change. (Default: False)

In Apache

mod_wsgi can be used with Apache to mount talook. While the standalone server will work just fine for some environments it's important to remember it's single threaded and won't perform well under some conditions. There are example files in contrib/apache/ which can help set an instance up. Note that the wsgi process owner will need to be able to write and/or read from the locations listed in the config.json just like in the standalone server!

• talook.wsgi: The WSGI file that mod_wsgi will use.
• talook.conf: The configuration file which mounts the WSGI application.

SELinux

One or both may be needed when using mod_wsgi on Apache if SELinux is enabled.

• setsebool -P httpd_can_network_connect 1
• semanage port -a -t http_port_t -p tcp 8008

Packaging

RPM

To generate an RPM issue the following command:

$ make rpm

You'll then be able to install and run talook as a system service.