How to automatically execute script on host after docker container is started?

Question

Computer networks

Initially there is: a host running docker daemon. Disabled iptables and ip-masq in startup options. The host has an external network interface (eth0) connected to the bridge (br0), the bridge has a static address configured (192.168.0.10/24).
You need to run several containers and assign a fixed address to each:

• app1 - 192.168.0.21
  
• app2 - 192.168.0.22
  
• app3 - 192.168.0.23
  

To run I use docker-compose up -d. Compose is interesting in that it restarts the container itself if it crashes.
There is a great article on this topic: blog.oddbit.com/2014/08/11/four-ways-to-connect-a-...
It is suggested that you first start the container as is, and then add the address from the host:

# docker run -d --name app1 local/app1
# ip link add app1-int type veth peer name app1-ext
# brctl addif br0 app1-ext
# ip link set netns $(docker-pid app1) dev app1-int
# nsenter -t $(docker-pid app1) -n ip link set app1-int up
# nsenter -t $(docker-pid app1) -n ip addr add 192.168.0.21/24 dev app1-int
# nsenter -t $(docker-pid app1) -n ip route del default
# nsenter -t $(docker-pid app1) -n ip route add default via 192.168.0.1 dev app1-int

The option is suitable, you can wrap it in a script.
The only question is: when the application crashes, compose will restart it. Is there a way to automatically run this script on the host immediately after (re)starting the container?
There is another option: run the script inside the container (via CMD), which, before the application starts, accesses the host (for example, via ssh) and runs the script. Looks crooked.

Answer 1

It may be possible to specify a static ip https://docs.docker.com/compose/compose-file/#/networks