Test HDFS

This is a docker image for rclone's integration tests which runs an
hdfs filesystem in a docker image.

Build

docker build --rm -t rclone/test-hdfs .
docker push rclone/test-hdfs

configure remote:

[TestHdfs]
type = hdfs
namenode = 127.0.0.1:8020
username = root

run tests

cd backend/hdfs
GO111MODULE=on go test -v

hdfs logs will be available in .stdout.log and .stderr.log

test can be run against kerberos-enabled hdfs

configure local krb5.conf

[libdefaults]
    default_realm = KERBEROS.RCLONE
[realms]
    KERBEROS.RCLONE = {
        kdc = localhost
    }

enable kerberos in remote configuration

[TestHdfs]
...
service_principal_name = hdfs/localhost
data_transfer_protection = privacy

run test

cd backend/hdfs
KERBEROS=true GO111MODULE=on go test -v