Vault Docker Image - Cant get REST Response - docker

Question

I am deploying vault docker image on Ubuntu 16.04, I am successful initializing it from inside the image itself, but I cant get any Rest Responses, and even curl does not work.
I am doing the following:
Create config file local.json :
{
"listener": [{
"tcp": {
"address": "127.0.0.1:8200",
"tls_disable" : 1
}
}],
"storage" :{
"file" : {
"path" : "/vault/data"
}
}
"max_lease_ttl": "10h",
"default_lease_ttl": "10h",
}
under /vault/config directory
running the command to start the image
docker run -d -p 8200:8200 -v /home/vault:/vault --cap-add=IPC_LOCK vault server
entering bash terminal of the image :
docker exec -it containerId /bin/sh
Running inside the following command
export VAULT_ADDR='http://127.0.0.1:8200' and than vault init
It works fine, but when I am trying to send rest to check if vault initialized:
Get request to the following url : http://Ip-of-the-docker-host:8200/v1/sys/init
Getting No Response.
even curl command fails:
curl http://127.0.0.1:8200/v1/sys/init
curl: (56) Recv failure: Connection reset by peer
Didnt find anywhere online with a proper explanation what is the problem, or if I am doing something wrong.
Any Ideas?

Answer 1

If a server running in a Docker container binds to 127.0.0.1, it's unreachable from anything outside that specific container (and since containers usually only run a single process, that means it's unreachable by anyone). Change the listener address to 0.0.0.0:8200; if you need to restrict access to the Vault server, bind it to a specific host address in the docker run -p option.