Introduction:⌗

This article explains how to integrate uWSGI with New Relic for Python. We’ll use the admin script . This method is recommended because it is easy and doesn’t require making changes to your app code.

Variables:⌗ 

CentOS 7.3.1611
Python 3.4.5
uwsgi 2.0.15

Install Python 3 and uWSGI from EPEL (Extra Packages for Enterprise Linux) repository:

# yum install -y python34 python34-pip uwsgi uwsgi-plugin-python3

Create Python virtual environment:

# mkdir -p /projects/myapp
# virtualenv --python=/usr/bin/python3 /projects/myapp/venv34

Install New Relic agent in your virtualenv and generate the agent configuration file:

# source /projects/myapp/venv34/bin/activate
(venv34) # pip install newrelic
(venv34) # newrelic-admin generate-config YOUR_LICENSE_KEY newrelic.ini

We need to modify the existing systemd service unit for uWSGI to prefix the ExecStart command with newrelic-admin script:

# cp /usr/lib/systemd/system/uwsgi.service /etc/systemd/system/

# diff -u /usr/lib/systemd/system/uwsgi.service /etc/systemd/system/uwsgi.service
--- /usr/lib/systemd/system/uwsgi.service	2017-05-19 15:31:54.000000000 +0100
+++ /etc/systemd/system/uwsgi.service	2017-07-05 09:38:04.413117252 +0100
@@ -4,9 +4,10 @@
 
 [Service]
 EnvironmentFile=-/etc/sysconfig/uwsgi
+Environment="NEW_RELIC_CONFIG_FILE=/projects/myapp/newrelic.ini"
 ExecStartPre=/bin/mkdir -p /run/uwsgi
 ExecStartPre=/bin/chown uwsgi:uwsgi /run/uwsgi
-ExecStart=/usr/sbin/uwsgi --ini /etc/uwsgi.ini
+ExecStart=/projects/myapp/venv34/bin/python /projects/myapp/venv34/bin/newrelic-admin run-program /usr/sbin/uwsgi --ini /etc/uwsgi.ini
 ExecReload=/bin/kill -HUP $MAINPID
 KillSignal=SIGINT
 Restart=always

This is my uWSGI config for Django but the above setup should work with any other web framework like Flask etc.:

# cat /etc/uwsgi.d/myapp.ini
[uwsgi]

# Variables
base = /projects/myapp

# Generic Config
auto-procname = true
procname-prefix-spaced = [%i]
plugins = python3
virtualenv = %(base)/venv34
pythonpath = %(base)/myapp
module = myapp.wsgi
logto = /var/log/uwsgi/%n.log
socket = /run/uwsgi/%n.sock
chmod-socket = 777
harakiri = 30
vacuum = true
max-requests = 1000
enable-threads = true
processes = 50
cheaper-algo = spare
cheaper = 2
cheaper-step = 1

Reload the configuration and start uWSGI service:

# systemctl daemon-reload
# systemctl enable uwsgi.service
# systemctl start uwsgi.service