I am trying to create a Python Flask API on WSGI that I want to run on Google Cloud Run.
The code is stored in a Github repository. In https://console.cloud.google.com/run I have added the Github repository so that when a new push is made to main branch then a build will be done.
The code is a Flask API running on WSGI webserver. I get some error messages when I try to run it on Google Run: ERROR: build step 2 "gcr.io/google.com/cloudsdktool/cloud-sdk:slim" failed: step exited with non-zero status: 1
config/flask-site-nginx.conf
server {
location / {
try_files $uri @yourapplication;
}
location @yourapplication {
include uwsgi_params;
uwsgi_pass unix:///tmp/uwsgi.sock;
}
}
config/nginx.conf
# based on default config of nginx 1.12.1
# Define the user that will own and run the Nginx server
user nginx;
# Define the number of worker processes; recommended value is the number of
# cores that are being used by your server
# auto will default to number of vcpus/cores
worker_processes auto;
# altering default pid file location
pid /tmp/nginx.pid;
# turn off daemon mode to be watched by supervisord
daemon off;
# Enables the use of JIT for regular expressions to speed-up their processing.
pcre_jit on;
# Define the location on the file system of the error log, plus the minimum
# severity to log messages for
error_log /var/log/nginx/error.log warn;
# events block defines the parameters that affect connection processing.
events {
# Define the maximum number of simultaneous connections that can be opened by a worker process
worker_connections 1024;
}
# http block defines the parameters for how NGINX should handle HTTP web traffic
http {
# Include the file defining the list of file types that are supported by NGINX
include /etc/nginx/mime.types;
# Define the default file type that is returned to the user
default_type text/html;
# Don't tell nginx version to clients.
server_tokens off;
# Specifies the maximum accepted body size of a client request, as
# indicated by the request header Content-Length. If the stated content
# length is greater than this size, then the client receives the HTTP
# error code 413. Set to 0 to disable.
client_max_body_size 0;
# Define the format of log messages.
log_format main '$remote_addr - $remote_user [$time_local] "$request" '
'$status $body_bytes_sent "$http_referer" '
'"$http_user_agent" "$http_x_forwarded_for"';
# Define the location of the log of access attempts to NGINX
# access_log /var/log/nginx/access.log main;
access_log /dev/stdout main;
# Define the parameters to optimize the delivery of static content
sendfile on;
tcp_nopush on;
tcp_nodelay on;
# Define the timeout value for keep-alive connections with the client
keepalive_timeout 65;
# Define the usage of the gzip compression algorithm to reduce the amount of _data to transmit
#gzip on;
# Include additional parameters for virtual host(s)/server(s)
include /etc/nginx/conf.d/*.conf;
}
supervisord.conf
[supervisord]
nodaemon=true
[program:uwsgi]
command=/usr/local/bin/uwsgi --ini /etc/uwsgi/uwsgi.ini --die-on-term
stdout_logfile=/dev/stdout
stdout_logfile_maxbytes=0
stderr_logfile=/dev/stderr
stderr_logfile_maxbytes=0
[program:nginx]
command=/usr/sbin/nginx
stdout_logfile=/dev/stdout
stdout_logfile_maxbytes=0
stderr_logfile=/dev/stderr
stderr_logfile_maxbytes=0
uwsgi.ini
[uwsgi]
module = src.wsgi
callable = app
uid = nginx
gid = nginx
socket = /tmp/uwsgi.sock
chown-socket = nginx:nginx
chmod-socket = 664
cheaper = 1
processes = %(%k + 1)
src/__init__.py
(empty file)
src/main.py
import os
from flask import Flask
from flask_cors import CORS
app = Flask(__name__)
cors = CORS(app)
app.config['CORS_HEADERS'] = 'Content-Type'
# Routes
@app.route('/', methods=['GET'])
def __index():
return "Hello from Flask API running on WSGI"
# - Main start ----------------------------------------------------------------
if __name__ == "__main__":
# Start app
print("main() :: Flask API is starting at: http://127.0.0.1:8080")
app.run(debug=True, host="0.0.0.0", port=int(os.environ.get("PORT", 8080)))
src/wsgi.py
import os
from src.main import app
if __name__ == "__main__":
print("wsgi() :: Flask API is starting at: http://127.0.0.1:8080")
app.run(debug=True, host="0.0.0.0", port=int(os.environ.get("PORT", 8080)))
Dockerfile
# Specify Python
FROM python:latest
# Copy files
RUN mkdir /app
WORKDIR /app
COPY . .
# Install Nginx web server
RUN apt-get update
RUN apt-get install -y --no-install-recommends \
libatlas-base-dev gfortran nginx supervisor
# Install uWSGI Web Server Gateway Interface
RUN pip install uwsgi
# Install requiremets
RUN pip install -r requirements.txt
# Configure Nginx and uWSGI
RUN useradd --no-create-home nginx
RUN rm /etc/nginx/sites-enabled/default
RUN rm -r /root/.cache
COPY config/nginx.conf /etc/nginx/
COPY config/flask-site-nginx.conf /etc/nginx/conf.d/
COPY config/uwsgi.ini /etc/uwsgi/
COPY config/supervisord.conf /etc/
CMD ["/usr/bin/supervisord"]
requirements.txt
flask
flask-unittest
Flask-RESTful
flask-cors
When I try to push the code Google Run builds it but it gives me errors:
Creating revision:
The user-provided container failed to start and listen on the port defined provided by the PORT=8080 environment variable. Logs for this revision might contain more information. Logs URL: https://console.cloud.google.com/logs/viewer?project=engineering-infra&resource=cloud_run_revision/service_name/template-google-cloud-run-backend/revision_name/template-google-cloud-run-backend-00009-rew&advancedFilter=resource.type%3D%22cloud_run_revision%22%0Aresource.labels.service_name%3D%22template-google-cloud-run-backend%22%0Aresource.labels.revision_name%3D%22template-google-cloud-run-backend-00009-rew%22 For more troubleshooting guidance, see https://cloud.google.com/run/docs/troubleshooting#container-failed-to-start
Routing traffic
Pending
Building and deploying from repository:
Trigger execution failed: source code could not be built or deployed; find more information in build logs Revision 'template-google-cloud-run-backend-00009-rew' is not ready and cannot serve traffic. The user-provided container failed to start and listen on the port defined provided by the PORT=8080 environment variable. Logs for this revision might contain more information. Logs URL: https://console.cloud.google.com/logs/viewer?project=engineering-infra&resource=cloud_run_revision/service_name/template-google-cloud-run-backend/revision_name/template-google-cloud-run-backend-00009-rew&advancedFilter=resource.type%3D%22cloud_run_revision%22%0Aresource.labels.service_name%3D%22template-google-cloud-run-backend%22%0Aresource.labels.revision_name%3D%22template-google-cloud-run-backend-00009-rew%22 For more troubleshooting guidance, see https://cloud.google.com/run/docs/troubleshooting#container-failed-to-start
The build logs gives me:
Step #2 - "Deploy": 219f975b51dc: Pull complete
Step #2 - "Deploy": Digest: sha256:8dde46b24ab5c496d1fb11bdd87a68a07f8d752098caac87bc60d59d904a1ff5
Step #2 - "Deploy": Status: Downloaded newer image for gcr.io/google.com/cloudsdktool/cloud-sdk:slim
Step #2 - "Deploy": gcr.io/google.com/cloudsdktool/cloud-sdk:slim
Step #2 - "Deploy": Deploying...
Step #2 - "Deploy": Creating Revision....failed
Step #2 - "Deploy": Deployment failed
Step #2 - "Deploy": ERROR: (gcloud.run.services.update) The user-provided container failed to start and listen on the port defined provided by the PORT=8080 environment variable. Logs for this revision might contain more information.
Step #2 - "Deploy":
Step #2 - "Deploy": Logs URL: https://console.cloud.google.com/logs/viewer?project=engineering-infra&resource=cloud_run_revision/service_name/template-google-cloud-run-backend/revision_name/template-google-cloud-run-backend-00009-rew&advancedFilter=resource.type%3D%22cloud_run_revision%22%0Aresource.labels.service_name%3D%22template-google-cloud-run-backend%22%0Aresource.labels.revision_name%3D%22template-google-cloud-run-backend-00009-rew%22
Step #2 - "Deploy": For more troubleshooting guidance, see https://cloud.google.com/run/docs/troubleshooting#container-failed-to-start
Finished Step #2 - "Deploy"
ERROR
ERROR: build step 2 "gcr.io/google.com/cloudsdktool/cloud-sdk:slim" failed: step exited with non-zero status: 1
