When you want to track the metrics from your Fedora 4 repository, this guide can help you install and configure a Graphite instance.
You will need the following software pre-installed:
- Apache HTTPD
- mod_wsgi
- Cairo
- Python (2.6, 2.7)
- Django (1.6)
- Various Python modules
- pycairo
- django-tagging
- json or simplejson
You can find the original Graphite installation instructions here, for the sake of completeness much will be repeated below.
Download Whisper, Carbon and Graphite-web
Clone the GitHub repositories (use either the 0.9.x [stable] branch or master [unstable/alpha] branch).
Note: The source files found at https://launchpad.net/graphite/+download/ are very out of date and do not support Django versions greater than 1.4.
My starting directory looks like.
/Users/fedora_user/graphite_downloads] > ll total 0 drwxr-xr-x 19 fedora_user staff 646 5 Sep 12:31 carbon drwxr-xr-x 23 fedora_user staff 782 4 Sep 15:37 graphite-web drwxr-xr-x 10 fedora_user staff 340 5 Sep 08:58 whisper
Install whisper
cd whisper sudo python setup.py install cd ..
Install Carbon
cd carbon sudo python setup.py install cd ..
This installs to /opt/graphite by default.
Install Graphite-web
cd graphite-web sudo python check-dependencies.py
Check for any fatal errors and resolve them, (ie. missing modules, libraries). There are 3 warnings that can be ignored (they are related to optional features). Once you are ready.
sudo python setup.py install cd ..
Configure Graphite
cd /opt/graphite/conf cp carbon.conf.example carbon.conf cp storage-schemas.conf.example storage-schemas.conf cp graphite.wsgi.example graphite.wsgi
This setups up a default data retention period of gathering data every second and storing it for 1 day. You can configure this by editing the storage-schemas.conf file.
Configure Apache
There is an Apache Virtual Hosts file provided in the graphite-web/examples directory. You can use this to configure your Apache installation.
Things to pay attention to in this file:
WSGISocketPrefix run/wsgi
this needs to be set to a directory that the webserver can write to and can be either a relative or an absolute path.
Both the <Location "/content/"> and <Location "/media/"> do not specify access. You may need to add them.
ie.
<Location "/content/"> SetHandler None </Location>
to
<Location "/content/"> SetHandler None Order deny,allow Allow from all </Location>
Setup Database
By default Graphite uses a sqlite3 database, but you can configure it to use a MySQL, Postgresql or Oracle database instead.
cd /opt/graphite/webapp/graphite cp local_settings.py.example local_settings.py
Then edit local_setttings.py.
- Set the SECRET_KEY
- Set Logging section to:
# Logging LOG_RENDERING_PERFORMANCE = True LOG_CACHE_PERFORMANCE = True LOG_METRIC_ACCESS = True
- Find the DATABASES variable and un-comment it.
- If you are NOT using a sqlite3 database, change the ENGINE parameter and add required parameters (username, password, hostname, port).
- Save the file.
Create the database
cd /opt/graphite/webapp/graphite sudo python manage.py syncdb
- If you are using the default sqlite3 database, create an administrator username/password when prompted and then re-open local_settings.py and add the administrator username/password to the DATABASES variable.
- If you receive an error "ImportError: cannot import name execute_manager", you have an old version of graphite-web that requires Django 1.4. Get the latest changes from the GitHub repositories.
Make sure that the entire storage directory (default /opt/graphite/storage) and all files are owned by the webserver process.
Start Data Collector
cd /opt/graphite/bin/ sudo python carbon-cache.py start Password: Starting carbon-cache (instance a)
This starts the listener on localhost:2003, this can be configured in /opt/graphite/conf/carbon.conf.
Note: On my MacBook Pro, I received the message
'WHISPER_FALLOCATE_CREATE is enabled but linking failed.'
This can be disabled by turning
WHISPER_FALLOCATE_CREATE = False
in /opt/graphite/conf/carbon.conf but will not harm the running process and does not need to be disabled.
Restart Apache
If all is well then browsing to your webserver's homepage should look something like this.
Connecting Fedora
To enable Metrics reporting to Graphite, activate the Spring profile metrics.graphite. The system properties fcrepo.metrics.host (defaults to localhost) and fcrepo.metrics.port (defaults to 2003) can also be set.
When testing with Maven use
MAVEN_OPTS="-Xmx512m -Dspring.profiles.active=metrics.graphite" mvn jetty:run
or add it to the web.xml
<context-param> <param-name>spring.profiles.active</param-name> <param-value>metrics.graphite</param-value> </context-param>
TODO: This method needs to be tested - Jared Whiklo