Docker EXEC Operations - Level 2 - Task failed with error - - 'apache2' is not configured to use correct port

KodeKloud Engineer
#1

Hi Team,
Hope you are doing great !

Kindly guide me where I am going wrong :-

  1. In understanding the question regarding the ports or issue.
    – example :- port should be 80:5002 and I am giving 5002:5002
  2. Or I am missing some steps which is being checked by the python script and result is failed task with error given below.

Question Screenshot :-

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Things I have tried to verify from my side.

  • First stopped and removed old container then :-
    Created a new container with port number 5002:5002 as per the task given with same

    • name = kkloud,
    • image ubuntu 18:04,
    • installed apache2 inside the container using apt command.
    • changed apache default port 80 to 5002 by updating the file inside container
      file name :- /etc/apache2/ports.conf

  • Check and Verification done from my side

    • Checked docker ps output container is running & it showed mapping of ports like this 5002:5002.

    • Checked from inside the container -

      • correct port number is showing in the file /etc/apache2/ports.conf
      • Apache services are running , even restarted it once and again verified it was running.
      • did the curl on localhost port 5002 (from inside the container) and its working.
      • Installed netstat and verified port 5002 is listing.

    • From the Host CLI verified using -

      • curl on port 5002 - it was working got the output.
      • Installed netstat and verified port 5002 is listing.

    • Since this task failed , I tried once again but got similar error for port 6400 for “Apache server 2”

---------> Relevant Screenshot and Error message I have shared below <----------

**Error :- **
====

  • ‘apache2’ is not configured to use correct port i.e ‘5002’ in ‘kkloud’ container on App Server 3
    FAILED docker-exec.py::test_docker_exec - AssertionError: - ‘apache2’ is not …

Screenshot for curl from host (App Server 3) is working fine for the url : - http://localhost:5002/

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Even i have checked for listing port from host and inside the container and its fine.
Screenshot for netstat command output from Host (App Server 3)

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**

Since 1st Attempt it failed so I tried 2nd time still getting similar error

**

**Error :- **
====

  • ‘apache2’ is not configured to use correct port i.e ‘6400’ in ‘kkloud’ container on App Server 2
    FAILED docker-exec.py::test_docker_exec - AssertionError: - ‘apache2’ is not …
    Error Screenshot Below
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Screenshot for kkloud container file output :-etc/apache2/ports.conf

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Screenshot for curl from host (App Server 2) is working fine for the url : - http://localhost:6400/

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#2

Hi have faced the same issue with this question.

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#3

Hi @Arunabh & @anusharma0426,
Thanks for highlighting this. We will check and get back to you.

If possible, please DM the exact steps you performed in the lab.

Regards,

#4

Hi @Arunabh,
I checked this task and didn’t find any issues. We don’t need to kill and recreate the container.
We need to configure the Apache server this way; it should show the index page on localhost:<PORT>.

Also, I don’t see any line where it says to expose the container port on the host port.

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Regards,

#5

Hi @Tej-Singh-Rana , thanks for your reply.
General info/steps I have shared with you in my previous post.

I have tried multiple ways , but to keep it simple you can go with below first and let me know if any doubt or confusion in my steps.

STEPS :-

1) List the container using “docker ps -a”

  • Stop and Remove the container using docker stop , docker rm

2) Create a shell script (start_apache.sh) on Host current directory- with below content

#!/bin/bash

Update package lists and install Apache

apt-get update
apt-get install -y apache2

Change Apache’s default port from 80 to 5002

sed -i ‘s/Listen 80/Listen 5002/’ /etc/apache2/ports.conf

Redirect Apache’s error log to standard output (useful for troubleshooting)

ln -sf /dev/stdout /var/log/apache2/error.log

Start Apache in the foreground

apache2ctl -D FOREGROUND

3) Give executable permission :- chmod +x start_apache.sh

4) Create a container using the below command :-
docker run -d -p 5002:5002 --name kkloud -v “$(pwd)/start_apache.sh:/start_apache.sh” ubuntu:18.04 /bin/bash -c “/start_apache.sh”

5) Verify container is running using docker ps ,check its output for ports or use this command
example :-
docker port kkloud
5002/tcp → 0.0.0.0:5002
5002/tcp → :::5002

6) do curl and test
example :-
$ curl http://localhost:5002/

------------------------------------------------------------------------------------------------------------- +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++

Exact steps I have tried in my AWS VM and its working fine see the screenshot

since Kodekloud Lab is using private Ip , so we can’t see it in browser
But in My AWS i can see the index.html on port 5002 as i have public IP address.

AWS VM :- able to access apache2 on port 5002 and below is screenshot for webpage

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We can user w3m or lynx etc… which ever you want to use to check webpage from linux terminal in lab also.

I have shared screenshot from AWS VM cli for apache2 webpage on port 5002
$ w3m http://localhost:5002/

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#6

Hi @Arunabh,
Please read my previous comment.

Regards,

#7

@Tej-Singh-Rana
thanks for the update.

I got your point , as per the task no need to expose the port to HOST , we have to curl from container inside , thanks for making it clear.

I have following question/doubts . Kindly guide me on that.

  1. What that python script is checking , can you please tell ?
    – since I want to know why my task failed , if you see I have done extra only that is exposing the port to HOST so that container apache can be accessed outside container also.
    – if script is only checking for apache2 status and contain status inside which it is running then script should have passed and might have not checked for the HOST port.

– is script checking on the container id also – may be this might be leading to failure .

– So instead of guessing I want to know why it failed requesting you to kindly share if possible what condition that python script is checking.

Since you mentioned , I checked that lab again just to check but today :-
– i found that Ubuntu container was running and was showing on docker ps command output ,
– Yesterday I was not able to see the container under "docker ps " i was only able to see it under “docker ps -a” , that’s why I was creating a new container.