[lxc-devel] do pid1 and pid2 run in the same network namespace

[Daniel Lezcano]

On 02/22/2011 10:44 AM, Maheswara Reddy C - ERS, HCL Tech wrote:
> Hi Daniel,
>
> I have to create 10 namespaces(network), in each namespace I have to run two different processes.

Then it is quite easy. You just have to fork ten times the routine in 
the program I gave you in the previous email.

> -----Original Message-----
> From: Daniel Lezcano [mailto:daniel.lezcano at free.fr]
> Sent: Tuesday, February 22, 2011 2:47 PM
> To: Maheswara Reddy C - ERS, HCL Tech
> Cc: lxc-devel at lists.sourceforge.net
> Subject: Re: [lxc-devel] do pid1 and pid2 run in the same network namespace
>
> On 02/22/2011 07:41 AM, Maheswara Reddy C - ERS, HCL Tech wrote:
>> Hi All,
>>
>>
>>
>> Does this way both pid1 and pid2 run in the same network namespace? Or please suggest any other way
> Mahesh,
>
> please tell us what you want to do.
>
> If you want to create a new network namespace, it is not mandatory to
> use clone. The following program will create a new network stack and all
> new processes will inherit this network namespace.
>
> #include<sched.h>
> #include<stdio.h>
> #include<unistd.h>
>
> int main(int argc, char *argv[])
> {
>
>       pid_t pid;
>
>       if (unshare(CLONE_NEWNET)) {
>           perror("unshare");
>           return 1;
>       }
>
>       pid = fork();
>       if (pid<  0) {
>           perror("fork");
>           return 1;
>       }
>
>       if (!pid) {
>           execl("/bin/bash", "/bin/bash", NULL);
>           perror("execl");
>       }
>
>       return waitpid(pid, NULL, 0);
> }
>
> I recommand you read the documentation
> http://lxc.sourceforge.net/doc/sigops/appcr.pdf
>
> Thanks
>     -- Daniel
>
>
>
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