remote s3: Add option to disable the use of SSL

dvc/config.py

@@ -123,12 +123,15 @@ class Config(object):
     SECTION_AWS_ENDPOINT_URL = 'endpointurl'
     SECTION_AWS_REGION = 'region'
     SECTION_AWS_PROFILE = 'profile'
+    SECTION_AWS_USE_SSL = 'use_ssl'
     SECTION_AWS_SCHEMA = {
         SECTION_AWS_STORAGEPATH: str,
         Optional(SECTION_AWS_REGION): str,
         Optional(SECTION_AWS_PROFILE): str,
         Optional(SECTION_AWS_CREDENTIALPATH): str,
         Optional(SECTION_AWS_ENDPOINT_URL): str,
+        Optional(SECTION_AWS_USE_SSL,
+                 default=True): And(str, is_bool, Use(to_bool)),
     }
 
     # backward compatibility
@@ -162,6 +165,8 @@ class Config(object):
         Optional(SECTION_AWS_PROFILE): str,
         Optional(SECTION_AWS_CREDENTIALPATH): str,
         Optional(SECTION_AWS_ENDPOINT_URL): str,
+        Optional(SECTION_AWS_USE_SSL,
+                 default=True): And(str, is_bool, Use(to_bool)),
         Optional(SECTION_GCP_PROJECTNAME): str,
         Optional(SECTION_CACHE_TYPE): SECTION_CACHE_TYPE_SCHEMA,
         Optional(SECTION_CACHE_PROTECTED,

dvc/remote/s3.py

@@ -60,6 +60,8 @@ class RemoteS3(RemoteBase):
 
         self.endpoint_url = config.get(Config.SECTION_AWS_ENDPOINT_URL)
 
+        self.use_ssl = config.get(Config.SECTION_AWS_USE_SSL, True)
+
         shared_creds = config.get(Config.SECTION_AWS_CREDENTIALPATH)
         if shared_creds:
             os.environ.setdefault('AWS_SHARED_CREDENTIALS_FILE', shared_creds)
@@ -84,7 +86,9 @@ class RemoteS3(RemoteBase):
         session = boto3.session.Session(profile_name=self.profile,
                                         region_name=self.region)
 
-        return session.client('s3', endpoint_url=self.endpoint_url)
+        return session.client('s3',
+                              endpoint_url=self.endpoint_url,
+                              use_ssl=self.use_ssl)
 
     def get_etag(self, bucket, key):
         try: