Lab : Python Deploy Flask Q 09

DevOps
#1

hi

IN Lab : Python Deply Flask Q 9 below is the question and hint

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Question
Run Gunicorn with 3 workers in background and confirm with curl

Check

  • info_outline Hint

Stop previously started process by pressing Ctrl + C . Run nohup gunicorn app:app -w 3 & and curl localhost:8000

  • Tasks not completed!

  • Check gunicorn running with 3 workers?

logs

===========================================================

Result :

The checks does not pass . Can you please review and confirm why ?
I have included the output of "tail -f /home/thor/nohup.out " and output of " ps -ef | grep gunicorn " for verification.

Below is my working

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thor@host01 /opt/simple-webapp-flask$
thor@host01 /opt/simple-webapp-flask$ nohup gunicorn app:app -w 3 &
[1] 214
thor@host01 /opt/simple-webapp-flask$ nohup: ignoring input and appending output to ‘/home/thor/nohup.out’

thor@host01 /opt/simple-webapp-flask$ curl localhost:8000
Welcome!thor@host01 /opt/simple-webapp-flask$
thor@host01 /opt/simple-webapp-flask$
thor@host01 /opt/simple-webapp-flask$ ps -ef | grep gunicorn
thor       178     1  0 20:15 pts/1    00:00:00 [gunicorn] <defunct>
thor       214    47  0 20:23 pts/1    00:00:00 /usr/bin/python2 /usr/bin/gunicorn app:app -w 3
thor       219   214  0 20:23 pts/1    00:00:00 /usr/bin/python2 /usr/bin/gunicorn app:app -w 3
thor       224   214  0 20:23 pts/1    00:00:00 /usr/bin/python2 /usr/bin/gunicorn app:app -w 3
thor       228   214  0 20:23 pts/1    00:00:00 /usr/bin/python2 /usr/bin/gunicorn app:app -w 3
thor       237    47  0 20:24 pts/1    00:00:00 grep --color=auto gunicorn
thor@host01 /opt/simple-webapp-flask$
thor@host01 /opt/simple-webapp-flask$ pwd
/opt/simple-webapp-flask
thor@host01 /opt/simple-webapp-flask$
thor@host01 /opt/simple-webapp-flask$ ls -al
total 32
drwxr-xr-x 3 root root 4096 Jan 19 20:11 .
drwxr-xr-x 1 root root 4096 Jan 19 20:09 ..
-rw-r--r-- 1 root root  254 Jan 19 20:11 app.py
-rw-r--r-- 1 root root  187 Jan 19 20:09 Dockerfile
drwxr-xr-x 8 root root 4096 Jan 19 20:09 .git
-rw-r--r-- 1 root root 1075 Jan 19 20:09 LICENSE
-rw-r--r-- 1 root root 1081 Jan 19 20:09 README.md
-rw-r--r-- 1 root root    6 Jan 19 20:09 requirements.txt
thor@host01 /opt/simple-webapp-flask$
thor@host01 /opt/simple-webapp-flask$ tail -f /home/thor/nohup.out
[2021-01-19 20:15:31 +0000] [173] [INFO] Starting gunicorn 19.10.0
[2021-01-19 20:15:31 +0000] [173] [INFO] Listening at: http://127.0.0.1:8000 (173)
[2021-01-19 20:15:31 +0000] [173] [INFO] Using worker: sync
[2021-01-19 20:15:31 +0000] [178] [INFO] Booting worker with pid: 178
[2021-01-19 20:23:03 +0000] [214] [INFO] Starting gunicorn 19.10.0
[2021-01-19 20:23:03 +0000] [214] [INFO] Listening at: http://127.0.0.1:8000 (214)
[2021-01-19 20:23:03 +0000] [214] [INFO] Using worker: sync
[2021-01-19 20:23:03 +0000] [219] [INFO] Booting worker with pid: 219
[2021-01-19 20:23:03 +0000] [224] [INFO] Booting worker with pid: 224
[2021-01-19 20:23:03 +0000] [228] [INFO] Booting worker with pid: 228



^C
thor@host01 /opt/simple-webapp-flask$
thor@host01 /opt/simple-webapp-flask$
thor@host01 /opt/simple-webapp-flask$ history
    1  cd /opt
    2  sudo git clone https://github.com/mmumshad/simple-webapp-flask
    3  pwd
    4  ls -al
    5  cd simple-webapp-flask/
    6  ls -al
    7  sudo pip install -r requirements.txt
    8  alias c=clear
    9  c
   10  cat app.py
   11  sudo sed -i 's/8080/5000/g' app.py
   12  cat app.py
   13  sudo python app.py
   14  nohup python app.py &
   15  c
   16  clear
   17  ps -ef | grep app
   18  kill -9 python
   19  kill -9 140
   20  ps -ef | grep app
   21  c
   22  sudo pip install gunicorn
   23  nohup gunicorn app:app &
   24  ps -ef | grep gunicorn
   25  ls -al
   26  tail -f /home/thor/nohup.out
   27  cat app.py
   28  ps -ef | grep gunicorn
   29  curl localhost:8000
   30  curl localhost:5000
   31  curl www.localhost:5000/app
   32  kill -9 173 178
   33  curl localhost:5000
   34  curl localhost:8000
   35  ps -ef | grep gunicorn
   36  c
   37  ps -ef | grep gunicorn
   38  c
   39  nohup gunicorn app:app -w 3 &
   40  curl localhost:8000
   41  ps -ef | grep gunicorn
   42  pwd
   43  ls -al
   44  tail -f /home/thor/nohup.out
   45  history
thor@host01 /opt/simple-webapp-flask$
thor@host01 /opt/simple-webapp-flask$

Checks :

  • info_outline Hint

Stop previously started process by pressing Ctrl + C . Run nohup gunicorn app:app -w 3 & and curl localhost:8000

  • Tasks not completed!

  • Check gunicorn running with 3 workers?

#2

@ppnehe can you please check this

capture
capture1136×272 144 KB
capture
capture1177×347 31.2 KB

#3

hi

Yes This is captured in my working above . But why the checks not passing ?
Do you see checks passes in your attempts


thor@host01 /opt/simple-webapp-flask$ curl localhost:8000
Welcome!thor@host01 /opt/simple-webapp-flask$
thor@host01 /opt/simple-webapp-flask$
thor@host01 /opt/simple-webapp-flask$ ps -ef | grep gunicorn
thor       178     1  0 20:15 pts/1    00:00:00 [gunicorn] <defunct>
thor       214    47  0 20:23 pts/1    00:00:00 /usr/bin/python2 /usr/bin/gunicorn app:app -w 3
thor       219   214  0 20:23 pts/1    00:00:00 /usr/bin/python2 /usr/bin/gunicorn app:app -w 3
thor       224   214  0 20:23 pts/1    00:00:00 /usr/bin/python2 /usr/bin/gunicorn app:app -w 3
thor       228   214  0 20:23 pts/1    00:00:00 /usr/bin/python2 /usr/bin/gunicorn app:app -w 3
thor       237    47  0 20:24 pts/1    00:00:00 grep --color=auto gunicorn
thor@host01 /opt/simple-webapp-flask$
#4

I had the same issue

#5

@Javier, I could see that the check is passing. Could you please provide the screenshot of the issue

capture
capture1786×856 326 KB

?

#6

I got the same issue and solved it during the session by just killing gunicorn (pkill gunicorn) and start it again.
I run the whole lab again after that but I couldn’t replicate it anymore.