In Lab - IP and Ports Q2 I get error when I try to execute below .
[thor@app01 simple-webapp-flask]$ cat /home/thor/nohup.out
Traceback (most recent call last):
File “app.py”, line 2, in
from flask import Flask
ImportError: No module named flask
I tried installing flask but it did not work as well . Can you please review and advise
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Q : In app01 server ensure that our app in /opt/simple-webapp-flask/ run on port 5000 and listen to 127.0.0.1 IP.
Run python app in background with nohup
Note: Nohup stands for no hang up, which can be executed as shown below.
nohup command-with-options &
Adding “&” at the end will move the process to run in background. When you execute a Unix job in the background ( using &) and logout from the session, your process will get killed. You can avoid this with nohup .
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Hint
line Hint
In app01 server run below
sudo sed -i 's/0.0.0.0/127.0.0.1/g;s/8080/5000/g' /opt/simple-webapp-flask/app.py;
cd /opt/simple-webapp-flask/; nohup python app.py &
thor@app01 simple-webapp-flask]$ pwd
/opt/simple-webapp-flask
[thor@app01 simple-webapp-flask]$ ls -al
total 32
drwxr-xr-x 3 root root 4096 Jan 27 00:30 .
drwxr-xr-x 1 root root 4096 Jan 27 00:29 ..
-rw-r--r-- 1 root root 256 Jan 27 00:30 app.py
-rw-r--r-- 1 root root 187 Jan 27 00:29 Dockerfile
drwxr-xr-x 8 root root 4096 Jan 27 00:29 .git
-rw-r--r-- 1 root root 1075 Jan 27 00:29 LICENSE
-rw-r--r-- 1 root root 1081 Jan 27 00:29 README.md
-rw-r--r-- 1 root root 6 Jan 27 00:29 requirements.txt
[thor@app01 simple-webapp-flask]$
[thor@app01 simple-webapp-flask]$ sudo pip install flask
Traceback (most recent call last):
File "/bin/pip", line 9, in <module>
load_entry_point('pip==21.0', 'console_scripts', 'pip')()
File "/usr/lib/python2.7/site-packages/pkg_resources.py", line 378, in load_entry_point
return get_distribution(dist).load_entry_point(group, name)
File "/usr/lib/python2.7/site-packages/pkg_resources.py", line 2566, in load_entry_point
return ep.load()
File "/usr/lib/python2.7/site-packages/pkg_resources.py", line 2260, in load
entry = __import__(self.module_name, globals(),globals(), ['__name__'])
File "/usr/lib/python2.7/site-packages/pip/_internal/cli/main.py", line 60
sys.stderr.write(f"ERROR: {exc}")
^
SyntaxError: invalid syntax
[thor@app01 simple-webapp-flask]$ sudo pip3 install flask
sudo: pip3: command not found
[thor@app01 simple-webapp-flask]$
[thor@app01 simple-webapp-flask]$ pip show flask
Traceback (most recent call last):
File "/usr/bin/pip", line 9, in <module>
load_entry_point('pip==21.0', 'console_scripts', 'pip')()
File "/usr/lib/python2.7/site-packages/pkg_resources.py", line 378, in load_entry_point
return get_distribution(dist).load_entry_point(group, name)
File "/usr/lib/python2.7/site-packages/pkg_resources.py", line 2566, in load_entry_point
return ep.load()
File "/usr/lib/python2.7/site-packages/pkg_resources.py", line 2260, in load
entry = __import__(self.module_name, globals(),globals(), ['__name__'])
File "/usr/lib/python2.7/site-packages/pip/_internal/cli/main.py", line 60
sys.stderr.write(f"ERROR: {exc}")
^
SyntaxError: invalid syntax
[thor@app01 simple-webapp-flask]$
[thor@app01 simple-webapp-flask]$ cat /home/thor/nohup.out
Traceback (most recent call last):
File "app.py", line 2, in <module>
from flask import Flask
ImportError: No module named flask
[thor@app01 simple-webapp-flask]$
[thor@app01 simple-webapp-flask]$ date
Wed Jan 27 00:35:56 UTC 2021
[thor@app01 simple-webapp-flask]$
[thor@app01 simple-webapp-flask]$ pwd
/opt/simple-webapp-flask
[thor@app01 simple-webapp-flask]$
[thor@app01 simple-webapp-flask]$ ls -al
total 32
drwxr-xr-x 3 root root 4096 Jan 27 00:30 .
drwxr-xr-x 1 root root 4096 Jan 27 00:29 ..
-rw-r--r-- 1 root root 256 Jan 27 00:30 app.py
-rw-r--r-- 1 root root 187 Jan 27 00:29 Dockerfile
drwxr-xr-x 8 root root 4096 Jan 27 00:29 .git
-rw-r--r-- 1 root root 1075 Jan 27 00:29 LICENSE
-rw-r--r-- 1 root root 1081 Jan 27 00:29 README.md
-rw-r--r-- 1 root root 6 Jan 27 00:29 requirements.txt
[thor@app01 simple-webapp-flask]$
[thor@app01 simple-webapp-flask]$
[thor@app01 simple-webapp-flask]$ sudo pip install flask
Traceback (most recent call last):
File "/bin/pip", line 9, in <module>
load_entry_point('pip==21.0', 'console_scripts', 'pip')()
File "/usr/lib/python2.7/site-packages/pkg_resources.py", line 378, in load_entry_point
return get_distribution(dist).load_entry_point(group, name)
File "/usr/lib/python2.7/site-packages/pkg_resources.py", line 2566, in load_entry_point
return ep.load()
File "/usr/lib/python2.7/site-packages/pkg_resources.py", line 2260, in load
entry = __import__(self.module_name, globals(),globals(), ['__name__'])
File "/usr/lib/python2.7/site-packages/pip/_internal/cli/main.py", line 60
sys.stderr.write(f"ERROR: {exc}")
^
SyntaxError: invalid syntax
[thor@app01 simple-webapp-flask]$ sudo pip3 install flask
sudo: pip3: command not found
[thor@app01 simple-webapp-flask]$
[thor@app01 simple-webapp-flask]$
[thor@app01 simple-webapp-flask]$ history
1 clear
2 pwd
3 ls -al
4 cd /opt
5 ls -al
6 clear
7 ls -al
8 cd simple-webapp-flask/
9 ls -al
10 cat app.py
11 sudo sed -i 's/8080/5000/g' app.py
12 sudo sed -i 's/0.0.0.0/127.0.0.1/g' app.py
13 cat app.py
14 clear
15 nohup python app.py &
16 ps -ef | grep app
17 ls -al
18 nohup python3 app.py &
19 ps -ef | grep python
20 clear
21 pwd
22 ls -al
23 sudo pip install flask
24 sudo pip3 install flask
25 pip show flask
26 cat /home/thor/nohup.out
27 date
28 pwd
29 ls -al
30 sudo pip install flask
31 sudo pip3 install flask
32 history
[thor@app01 simple-webapp-flask]$
