Issue with default bridge networking

I have used netns to setup the default bridge networking, I can ping external hosts, but I cannot resolve any hosts (even though I have set resolv.conf) and cannot make any HTTP requests to a host using it's IP address:

# ip addr
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN qlen 1
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
       valid_lft forever preferred_lft forever
    inet6 ::1/128 scope host 
       valid_lft forever preferred_lft forever
37: eth0@if38: <BROADCAST,MULTICAST,UP,LOWER_UP,M-DOWN> mtu 1500 qdisc noqueue state UP qlen 1000
    link/ether 86:62:e2:e8:45:7f brd ff:ff:ff:ff:ff:ff
    inet 172.19.0.10/16 scope global eth0
       valid_lft forever preferred_lft forever
    inet6 fe80::8462:e2ff:fee8:457f/64 scope link 
       valid_lft forever preferred_lft forever


/ # wget  10.117.148.5
Connecting to 10.117.148.5 (10.117.148.5:80)
wget: can't connect to remote host (10.117.148.5): Host is unreachable

/ # ping  10.117.148.5
PING 10.117.148.5 (10.117.148.5): 56 data bytes
64 bytes from 10.117.148.5: seq=0 ttl=63 time=0.265 ms
^C
--- 10.117.148.5 ping statistics ---
1 packets transmitted, 1 packets received, 0% packet loss round-trip min/avg/max = 0.265/0.265/0.265 ms

Here's my config.json:

{
        "ociVersion": "0.6.0-dev",
        "platform": {
                "os": "linux",
                "arch": "amd64"
        },
        "process": {
                "terminal": true,
                "user": {},
                "args": [
                        "sh"
                ],
                "env": [
                        "PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin",
                        "TERM=xterm"
                ],
                "cwd": "/",
                "capabilities": [
                        "CAP_CHOWN",
                        "CAP_DAC_OVERRIDE",
                        "CAP_FSETID",
                        "CAP_FOWNER",
                        "CAP_MKNOD",
                        "CAP_NET_RAW",
                        "CAP_SETGID",
                        "CAP_SETUID",
                        "CAP_SETFCAP",
                        "CAP_SETPCAP",
                        "CAP_NET_BIND_SERVICE",
                        "CAP_SYS_CHROOT",
                        "CAP_KILL",
                        "CAP_AUDIT_WRITE"
                ],
                "rlimits": [
                        {
                                "type": "RLIMIT_NOFILE",
                                "hard": 1024,
                                "soft": 1024
                        }
                ]
        },
        "root": {
                "path": "rootfs",
                "readonly": false
        },
        "mounts": [
                {
                        "destination": "/proc",
                        "type": "proc",
                        "source": "proc"
                },
                {
                        "destination": "/dev",
                        "type": "tmpfs",
                        "source": "tmpfs",
                        "options": [
                                "nosuid",
                                "strictatime",
                                "mode=755",
                                "size=65536k"
                        ]
                },
                {
                        "destination": "/dev/pts",
                        "type": "devpts",
                        "source": "devpts",
                        "options": [
                                "nosuid",
                                "noexec",
                                "newinstance",
                                "ptmxmode=0666",
                                "mode=0620",
                                "gid=5"
                        ]
                },
                {
                        "destination": "/dev/shm",
                        "type": "tmpfs",
                        "source": "shm",
                        "options": [
                                "nosuid",
                                "noexec",
                                "nodev",
                                "mode=1777",
                                "size=65536k"
                        ]
                },
                {
                        "destination": "/dev/mqueue",
                        "type": "mqueue",
                        "source": "mqueue",
                        "options": [
                                "nosuid",
                                "noexec",
                                "nodev"
                        ]
                },
                {
                        "destination": "/sys",
                        "type": "sysfs",
                        "source": "sysfs",
                        "options": [
                                "nosuid",
                                "noexec",
                                "nodev",
                                "ro"
                        ]
                }
        ],
        "hooks": {
                "prestart": [
                        {
                                "path": "/home/asaha/work/golang/bin/netns"
                        }
                ]
        },
        "linux": {
                "resources": {
                        "devices": [
                                {
                                        "allow": false,
                                        "access": "rwm"
                                }
                        ]
                },
                "namespaces": [
                        {
                                "type": "network"
                        },
                        {
                                "type": "pid"
                        },
                        {
                                "type": "mount"
                        },
                        {
                                "type": "ipc"
                        },
                        {
                                "type": "uts"
                        }
                ]
        }
}

(I am using an Alpine linux rootfs and I have SELinux in permissive mode on Fedora 23).

Any suggestions please?

Start with the supplied config.json and its prestart netns hook, then inspect the network namespace's routes and resolver behavior while reproducing the ping and wget failures. Done means identifying and documenting the configuration or networking change that enables both name resolution and HTTP connections.