This is not a bug in Python: name resolution may not work in the chroot unless you add the libraries that are loaded on the fly by the libc.

It *may* also work if you make one name resolution (using socket.getaddressinfo for example) *before* chrooting.

To demonstrate that Python is not involved, you can reproduce the failure with the C program below.


#include <sys/types.h>
#include <sys/socket.h>
#include <netdb.h>
#include <stdio.h>
#include <unistd.h>

int main() {
        int res;
        struct addrinfo *ai;

        if ((res = chroot("/tmp")) < 0) {
                printf("chroot failed with errno %d\n", -res);
        } else if ((res = getaddrinfo("google.de", "80", NULL, &ai)) < 0) {
                printf("getaddrinfo failed with errno %d: %s\n",
                       -res, gai_strerror(res));
        }
        return 0;
}