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Old 07-18-2019, 01:34 AM   #1
fawaz25
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Container within OS cannot connect to internet


Hello everyone,

I see around 50 containers running inside a docker in my OS (which is CentOS Linux release 7.5.1804 (Core)).

Now the problem is I want to update a license which will authenticate the license key with some server "www.xyz.com".

The OS have full internet access (192.168.55.100) and is able to telnet to www.xyz.com.
while configuring the containers, it asked for the value of internal subnet which it took as default as 192.168.13.0/24 (As per company documentation, it is asking to assign an internal IP address range of 256 IP address to be used for all internal networks).

I logged into the container responsible for authentication, and it is not connecting to the www.xyz.com.
The company support team is asking our network team to provide internet connection to 192.168.13.0 subnet which our network team is denying to do.

Is it possible to do that from the OS end?? Is it not possible for the container to connect to the internet via the Operating System IP (192.168.55.100)??

Looking forward for possible solutions.
 
Old 07-18-2019, 01:54 AM   #2
pan64
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hm. probably you need to read the documentation of docker. There are several possibilities to configure network.
https://www.slashroot.in/docker-netw...ation-tutorial
https://docs.docker.com/v17.09/engin...de/networking/
 
Old 07-18-2019, 06:13 AM   #3
dc.901
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Another option is ask if "the company" issue a license for an air-gapped system?
 
Old 07-18-2019, 06:59 AM   #4
TB0ne
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Quote:
Originally Posted by fawaz25 View Post
Hello everyone,
I see around 50 containers running inside a docker in my OS (which is CentOS Linux release 7.5.1804 (Core)).

Now the problem is I want to update a license which will authenticate the license key with some server "www.xyz.com".

The OS have full internet access (192.168.55.100) and is able to telnet to www.xyz.com.
while configuring the containers, it asked for the value of internal subnet which it took as default as 192.168.13.0/24 (As per company documentation, it is asking to assign an internal IP address range of 256 IP address to be used for all internal networks).

I logged into the container responsible for authentication, and it is not connecting to the www.xyz.com.
The company support team is asking our network team to provide internet connection to 192.168.13.0 subnet which our network team is denying to do.

Is it possible to do that from the OS end?? Is it not possible for the container to connect to the internet via the Operating System IP (192.168.55.100)?? Looking forward for possible solutions.
Bolded some things in your post, since this isn't making sense. You imply you're on the 'network team'...but YOU are logging in to the CentOS servers, to do software maintenance???

It's hard to believe that neither your systems administration or your network teams know how to handle a simple routing issue, or that they've not read the Docker documentation before implementing 50+ servers.
 
  


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