Registry credentials can be provided on a per-registry basis with the `registry_auth`
field, passing either a config file or the username/password directly.
``` hcl
provider "docker" {
host = "tcp://localhost:2376"
registry_auth {
address = "registry.hub.docker.com"
config_file = "~/.docker/config.json"
}
registry_auth {
address = "quay.io:8181"
username = "someuser"
password = "somepass"
}
}
data "docker_registry_image" "quay" {
name = "myorg/privateimage"
}
data "docker_registry_image" "quay" {
name = "quay.io:8181/myorg/privateimage"
}
```
**NOTES**
- The location of the config file is on the machine terraform runs on, nevertheless if the specified docker host is on another machine.
- When passing in a config file make sure every repo in the `auths` object has
an `auth` string. If not you'll get an `ErrCannotParseDockercfg` by the underlying `go-dockerclient`. On OSX the `auth` base64 string is stored in the `osxkeychain`, but reading from there is not yet supported. See [go-dockerclient#677](https://github.com/fsouza/go-dockerclient/issues/677) for details. In this case, either use `username` and `password` directly or add the string manually to the `config.json` by creating it via `echo -n "user:pass" | base64`.
