Invalid IP address on secondary host: "" + Failed to program FILTER chain: iptables failed

I am working with scientific code that was packaged in Docker containers by another person. I'm not very good at all the magic behind containers, images, etc. And I only used it by running some simple commands like docker-compose up

or docker-compose up --build

if I needed to add some dependencies in the code. So until the last night everything was completely normal. I was running a simulation that ran all night, but I saw that the results were not very good, so I just killed the processed one by pressing ctrl + C

2 or 3 times. When I tried to run the simulation again docker-compose up

, I got an error that, unfortunately, I can’t remember now. Also, the strange thing is that at that moment I could not connect to the Internet. I rebooted, internet worked fine again, I tried to run againdocker-compose up

and I got the following output:

WARNING: The DOCKERHOST variable is not set. Defaulting to a blank string.
Creating alcor_alcor_1 ... 
alcor_cassandra_1 is up-to-date
Creating alcor_alcor_1 ... error

ERROR: for alcor_alcor_1  Cannot create container for service alcor: invalid IP address in add-host: ""

ERROR: for alcor  Cannot create container for service alcor: invalid IP address in add-host: ""
ERROR: Encountered errors while bringing up the project.

      

        
        
        
      

    

I removed all images, containers and volumes by running:
docker rm $(docker ps -a -f status=exited -q)


docker rmi $(docker images -a -q)


docker volume rm $(docker volume ls -f dangling=true -q)

And then I rebuilt everything by doing: docker-compose build --no-cache


There were no errors. I ran again docker-compose up

and still got the same error: invalid IP address in add-host: ""

Then I repeated my steps again: deleted all images, containers and volumes, restored everything and tried to start again. Now every time this shows me this:

WARNING: The DOCKERHOST variable is not set. Defaulting to a blank string.
Creating network "alcor_default" with the default driver
ERROR: Failed to program FILTER chain: iptables failed: iptables -I FORWARD -o br-231cf5f5b939 -j DOCKER: iptables v1.4.14: Couldn't load target `DOCKER':No such file or directory

Try `iptables -h' or 'iptables --help' for more information.
  (exit status 2)

      

        
        
        
      

    

What could be causing this and how to solve it? Can I provide more information to help understand this? Google docs and Docker don't say anything about this. And I didn't know anything about it. Any help is appreciated.

Here's what might help you understand the problem:

$ docker version
Client:
 Version:      17.06.0-ce
 API version:  1.30
 Go version:   go1.8.3
 Git commit:   02c1d87
 Built:        Fri Jun 23 21:27:03 2017
 OS/Arch:      linux/amd64

Server:
 Version:      17.06.0-ce
 API version:  1.30 (minimum version 1.12)
 Go version:   go1.8.3
 Git commit:   02c1d87
 Built:        Fri Jun 23 21:22:34 2017
 OS/Arch:      linux/amd64
 Experimental: false

      

        
        
        
      

    

Docker-compose.yml

version: '3'

services:
  alcor:
    build: .
    image: lycantropos/alcor:latest
    entrypoint: "/alcor/docker-entrypoint.sh"
    volumes:
      - .:/alcor/
    extra_hosts:
      - "dockerhost:$DOCKERHOST"  # for debugging
    command:
      # Here I omitted many options and arguments
      - simulate
    environment:
      - CASSANDRA_RPC_ADDRESS=cassandra
      - CASSANDRA_RPC_PORT=9042

  cassandra:
    image: cassandra:latest
    volumes:
      - cassandra-data:/var/lib/cassandra

volumes:
  cassandra-data:

      

        
        
        
      

    

Edit: I tried again. I cleared everything, rebooted and rebuilt and the first error came back.