gistify691462.sh

### Example #1 ###
$ docker ps -a
CONTAINER ID        IMAGE               COMMAND               CREATED             STATUS                   PORTS                               NAMES
2e23d01384ac        iperf-v1:latest     "/usr/bin/iperf -s"   10 minutes ago      Up 10 minutes            5001/tcp, 0.0.0.0:32768->5201/tcp   compassionate_goodall
# Append the container ID (CID) to the end of an inspect
$ docker inspect --format '{{ .NetworkSettings.IPAddress }}' 2e23d01384ac
172.17.0.1

### Example #2 ###
# Add -q to automatically parse and return the last CID created.
$ docker inspect --format '{{ .NetworkSettings.IPAddress }}' $(docker ps -q)
172.17.0.1

### Example #3 ###
# As of Docker v1.3 you can attach to a bash shell
docker exec -it  2e23d01384ac  bash
# That drops you into a bash shell then use the 'ip' command to grab the addr
root@2e23d01384ac:/# ip add | grep global
    inet 172.17.0.1/16 scope global eth0

### Example #4 ###
# Same as above but in a single line
$ docker exec -it  $(docker ps -q) bash

### Example #5 ###
# Pop this into your ~/.bashrc (Linux) or ~/.bash_profile (Mac)
dockip() {
  docker inspect --format '{{ .NetworkSettings.IPAddress }}' "$@"
}
# Source it to re-read your bashrc/profile
source ~/.bash_profile
# Now run the function with the container ID you want to get the addr of:
$ dockip 2e23d01384ac
172.17.0.1

### Example #6 ###
# Same as above but no argument needed and always return the latest container IP created.
dockip() {
  docker inspect --format '{{ .NetworkSettings.IPAddress }}' $(docker ps -q)
}

### Example #7 ###
# Add to bashrc/bash_profile to docker exec in passing the CID to dock-exec. E.g dock-exec $(docker ps -q) OR dock-exec 2e23d01384ac
dock-exec() { docker exec -i -t $@ bash ;}

### Example #8 ###
# Another little bash function you can pop into your bash profile
# Always docker exec into the latest container
dock-exec() { docker exec -i -t $(docker ps -l -q)  bash ;}
# The run ip addr
ip a

### Example #9 ###
# Finally you can export the environmental variables from the running container
docker exec -i -t $(docker ps -l -q) env | grep ADDR
# Output --> CLOUDNETPERF_CARBON_1_PORT_2003_TCP_ADDR=172.17.0.229

### Example #10 ###
# Or even run the ip address command as a parameter which fires off the ip address command and exits the exec
docker exec -i -t $(docker ps -l -q) ip a
# 1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default
#    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
# 470: eth0: <BROADCAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default
#    link/ether 02:42:ac:11:00:e9 brd ff:ff:ff:ff:ff:ff
#    inet 172.17.0.233/16 scope global eth0
#       valid_lft forever preferred_lft forever
#    inet6 fe80::42:acff:fe11:e9/64 scope link
#       valid_lft forever preferred_lft forever