Merge branch '16048-reload-config'

[arvados.git] / sdk / python / arvados / keep.py

diff --git a/sdk/python/arvados/keep.py b/sdk/python/arvados/keep.py
index 351f7f5dda8a96ebb805fd4d4896380cb3addbb8..86a28f54c402c8d44aba1d8511faab18e5e8b44a 100644 (file)
--- a/sdk/python/arvados/keep.py
+++ b/sdk/python/arvados/keep.py
@@ -292,7 +292,8 @@ class KeepClient(object):
         def __init__(self, root, user_agent_pool=queue.LifoQueue(),
                      upload_counter=None,
                      download_counter=None,
         def __init__(self, root, user_agent_pool=queue.LifoQueue(),
                      upload_counter=None,
                      download_counter=None,

-                     headers={}):
+                     headers={},
+                     insecure=False):

             self.root = root
             self._user_agent_pool = user_agent_pool
             self._result = {'error': None}
             self.root = root
             self._user_agent_pool = user_agent_pool
             self._result = {'error': None}


@@ -304,6 +305,7 @@ class KeepClient(object):
             self.put_headers = headers
             self.upload_counter = upload_counter
             self.download_counter = download_counter
             self.put_headers = headers
             self.upload_counter = upload_counter
             self.download_counter = download_counter

+            self.insecure = insecure

 
         def usable(self):
             """Is it worth attempting a request?"""
 
         def usable(self):
             """Is it worth attempting a request?"""


@@ -371,9 +373,11 @@ class KeepClient(object):
                         '{}: {}'.format(k,v) for k,v in self.get_headers.items()])
                     curl.setopt(pycurl.WRITEFUNCTION, response_body.write)
                     curl.setopt(pycurl.HEADERFUNCTION, self._headerfunction)
                         '{}: {}'.format(k,v) for k,v in self.get_headers.items()])
                     curl.setopt(pycurl.WRITEFUNCTION, response_body.write)
                     curl.setopt(pycurl.HEADERFUNCTION, self._headerfunction)

+                    if self.insecure:
+                        curl.setopt(pycurl.SSL_VERIFYPEER, 0)

                     if method == "HEAD":
                         curl.setopt(pycurl.NOBODY, True)
                     if method == "HEAD":
                         curl.setopt(pycurl.NOBODY, True)

-                    self._setcurltimeouts(curl, timeout)
+                    self._setcurltimeouts(curl, timeout, method=="HEAD")

 
                     try:
                         curl.perform()
 
                     try:
                         curl.perform()


@@ -417,6 +421,10 @@ class KeepClient(object):
                 _logger.info("HEAD %s: %s bytes",
                          self._result['status_code'],
                          self._result.get('content-length'))
                 _logger.info("HEAD %s: %s bytes",
                          self._result['status_code'],
                          self._result.get('content-length'))

+                if self._result['headers'].get('x-keep-locator'):
+                    # This is a response to a remote block copy request, return
+                    # the local copy block locator.
+                    return self._result['headers'].get('x-keep-locator')

                 return True
 
             _logger.info("GET %s: %s bytes in %s msec (%.3f MiB/sec)",
                 return True
 
             _logger.info("GET %s: %s bytes in %s msec (%.3f MiB/sec)",


@@ -463,6 +471,8 @@ class KeepClient(object):
                         '{}: {}'.format(k,v) for k,v in self.put_headers.items()])
                     curl.setopt(pycurl.WRITEFUNCTION, response_body.write)
                     curl.setopt(pycurl.HEADERFUNCTION, self._headerfunction)
                         '{}: {}'.format(k,v) for k,v in self.put_headers.items()])
                     curl.setopt(pycurl.WRITEFUNCTION, response_body.write)
                     curl.setopt(pycurl.HEADERFUNCTION, self._headerfunction)

+                    if self.insecure:
+                        curl.setopt(pycurl.SSL_VERIFYPEER, 0)

                     self._setcurltimeouts(curl, timeout)
                     try:
                         curl.perform()
                     self._setcurltimeouts(curl, timeout)
                     try:
                         curl.perform()


@@ -506,7 +516,7 @@ class KeepClient(object):
                 self.upload_counter.add(len(body))
             return True
 
                 self.upload_counter.add(len(body))
             return True
 

-        def _setcurltimeouts(self, curl, timeouts):
+        def _setcurltimeouts(self, curl, timeouts, ignore_bandwidth=False):

             if not timeouts:
                 return
             elif isinstance(timeouts, tuple):
             if not timeouts:
                 return
             elif isinstance(timeouts, tuple):


@@ -519,8 +529,9 @@ class KeepClient(object):
                 conn_t, xfer_t = (timeouts, timeouts)
                 bandwidth_bps = KeepClient.DEFAULT_TIMEOUT[2]
             curl.setopt(pycurl.CONNECTTIMEOUT_MS, int(conn_t*1000))
                 conn_t, xfer_t = (timeouts, timeouts)
                 bandwidth_bps = KeepClient.DEFAULT_TIMEOUT[2]
             curl.setopt(pycurl.CONNECTTIMEOUT_MS, int(conn_t*1000))

-            curl.setopt(pycurl.LOW_SPEED_TIME, int(math.ceil(xfer_t)))
-            curl.setopt(pycurl.LOW_SPEED_LIMIT, int(math.ceil(bandwidth_bps)))
+            if not ignore_bandwidth:
+                curl.setopt(pycurl.LOW_SPEED_TIME, int(math.ceil(xfer_t)))
+                curl.setopt(pycurl.LOW_SPEED_LIMIT, int(math.ceil(bandwidth_bps)))

 
         def _headerfunction(self, header_line):
             if isinstance(header_line, bytes):
 
         def _headerfunction(self, header_line):
             if isinstance(header_line, bytes):


@@ -541,7 +552,7 @@ class KeepClient(object):
             self._lastheadername = name
             self._headers[name] = value
             # Returning None implies all bytes were written
             self._lastheadername = name
             self._headers[name] = value
             # Returning None implies all bytes were written

-    
+

 
     class KeepWriterQueue(queue.Queue):
         def __init__(self, copies):
 
     class KeepWriterQueue(queue.Queue):
         def __init__(self, copies):


@@ -552,19 +563,19 @@ class KeepClient(object):
             self.successful_copies_lock = threading.Lock()
             self.pending_tries = copies
             self.pending_tries_notification = threading.Condition()
             self.successful_copies_lock = threading.Lock()
             self.pending_tries = copies
             self.pending_tries_notification = threading.Condition()

-        
+

         def write_success(self, response, replicas_nr):
             with self.successful_copies_lock:
                 self.successful_copies += replicas_nr
                 self.response = response
             with self.pending_tries_notification:
                 self.pending_tries_notification.notify_all()
         def write_success(self, response, replicas_nr):
             with self.successful_copies_lock:
                 self.successful_copies += replicas_nr
                 self.response = response
             with self.pending_tries_notification:
                 self.pending_tries_notification.notify_all()

-        
+

         def write_fail(self, ks):
             with self.pending_tries_notification:
                 self.pending_tries += 1
                 self.pending_tries_notification.notify()
         def write_fail(self, ks):
             with self.pending_tries_notification:
                 self.pending_tries += 1
                 self.pending_tries_notification.notify()

-        
+

         def pending_copies(self):
             with self.successful_copies_lock:
                 return self.wanted_copies - self.successful_copies
         def pending_copies(self):
             with self.successful_copies_lock:
                 return self.wanted_copies - self.successful_copies


@@ -613,25 +624,25 @@ class KeepClient(object):
             for _ in range(num_threads):
                 w = KeepClient.KeepWriterThread(self.queue, data, data_hash, timeout)
                 self.workers.append(w)
             for _ in range(num_threads):
                 w = KeepClient.KeepWriterThread(self.queue, data, data_hash, timeout)
                 self.workers.append(w)

-        
+

         def add_task(self, ks, service_root):
             self.queue.put((ks, service_root))
             self.total_task_nr += 1
         def add_task(self, ks, service_root):
             self.queue.put((ks, service_root))
             self.total_task_nr += 1

-        
+

         def done(self):
             return self.queue.successful_copies
         def done(self):
             return self.queue.successful_copies

-        
+

         def join(self):
             # Start workers
             for worker in self.workers:
                 worker.start()
             # Wait for finished work
             self.queue.join()
         def join(self):
             # Start workers
             for worker in self.workers:
                 worker.start()
             # Wait for finished work
             self.queue.join()

-        
+

         def response(self):
             return self.queue.response
         def response(self):
             return self.queue.response

-    
-    
+
+

     class KeepWriterThread(threading.Thread):
         TaskFailed = RuntimeError()
 
     class KeepWriterThread(threading.Thread):
         TaskFailed = RuntimeError()
 


@@ -762,6 +773,11 @@ class KeepClient(object):
         if local_store is None:
             local_store = os.environ.get('KEEP_LOCAL_STORE')
 
         if local_store is None:
             local_store = os.environ.get('KEEP_LOCAL_STORE')
 

+        if api_client is None:
+            self.insecure = config.flag_is_true('ARVADOS_API_HOST_INSECURE')
+        else:
+            self.insecure = api_client.insecure
+

         self.block_cache = block_cache if block_cache else KeepBlockCache()
         self.timeout = timeout
         self.proxy_timeout = proxy_timeout
         self.block_cache = block_cache if block_cache else KeepBlockCache()
         self.timeout = timeout
         self.proxy_timeout = proxy_timeout


@@ -775,6 +791,7 @@ class KeepClient(object):
 
         if local_store:
             self.local_store = local_store
 
         if local_store:
             self.local_store = local_store

+            self.head = self.local_store_head

             self.get = self.local_store_get
             self.put = self.local_store_put
         else:
             self.get = self.local_store_get
             self.put = self.local_store_put
         else:


@@ -934,7 +951,8 @@ class KeepClient(object):
                     root, self._user_agent_pool,
                     upload_counter=self.upload_counter,
                     download_counter=self.download_counter,
                     root, self._user_agent_pool,
                     upload_counter=self.upload_counter,
                     download_counter=self.download_counter,

-                    headers=headers)
+                    headers=headers,
+                    insecure=self.insecure)

         return local_roots
 
     @staticmethod
         return local_roots
 
     @staticmethod


@@ -963,6 +981,11 @@ class KeepClient(object):
         else:
             return None
 
         else:
             return None
 

+    def refresh_signature(self, loc):
+        """Ask Keep to get the remote block and return its local signature"""
+        now = datetime.datetime.utcnow().isoformat("T") + 'Z'
+        return self.head(loc, headers={'X-Keep-Signature': 'local, {}'.format(now)})
+

     @retry.retry_method
     def head(self, loc_s, **kwargs):
         return self._get_or_head(loc_s, method="HEAD", **kwargs)
     @retry.retry_method
     def head(self, loc_s, **kwargs):
         return self._get_or_head(loc_s, method="HEAD", **kwargs)


@@ -971,7 +994,7 @@ class KeepClient(object):
     def get(self, loc_s, **kwargs):
         return self._get_or_head(loc_s, method="GET", **kwargs)
 
     def get(self, loc_s, **kwargs):
         return self._get_or_head(loc_s, method="GET", **kwargs)
 

-    def _get_or_head(self, loc_s, method="GET", num_retries=None, request_id=None):
+    def _get_or_head(self, loc_s, method="GET", num_retries=None, request_id=None, headers=None):

         """Get data from Keep.
 
         This method fetches one or more blocks of data from Keep.  It
         """Get data from Keep.
 
         This method fetches one or more blocks of data from Keep.  It


@@ -996,84 +1019,88 @@ class KeepClient(object):
 
         self.get_counter.add(1)
 
 
         self.get_counter.add(1)
 

-        locator = KeepLocator(loc_s)
-        if method == "GET":
-            slot, first = self.block_cache.reserve_cache(locator.md5sum)
-            if not first:
-                self.hits_counter.add(1)
-                v = slot.get()
-                return v
-
-        self.misses_counter.add(1)
-
-        headers = {
-            'X-Request-Id': (request_id or
-                             (hasattr(self, 'api_client') and self.api_client.request_id) or
-                             arvados.util.new_request_id()),
-        }
-
-        # If the locator has hints specifying a prefix (indicating a
-        # remote keepproxy) or the UUID of a local gateway service,
-        # read data from the indicated service(s) instead of the usual
-        # list of local disk services.
-        hint_roots = ['http://keep.{}.arvadosapi.com/'.format(hint[2:])
-                      for hint in locator.hints if hint.startswith('K@') and len(hint) == 7]
-        hint_roots.extend([self._gateway_services[hint[2:]]['_service_root']
-                           for hint in locator.hints if (
-                                   hint.startswith('K@') and
-                                   len(hint) == 29 and
-                                   self._gateway_services.get(hint[2:])
-                                   )])
-        # Map root URLs to their KeepService objects.
-        roots_map = {
-            root: self.KeepService(root, self._user_agent_pool,
-                                   upload_counter=self.upload_counter,
-                                   download_counter=self.download_counter,
-                                   headers=headers)
-            for root in hint_roots
-        }
-
-        # See #3147 for a discussion of the loop implementation.  Highlights:
-        # * Refresh the list of Keep services after each failure, in case
-        #   it's being updated.
-        # * Retry until we succeed, we're out of retries, or every available
-        #   service has returned permanent failure.
-        sorted_roots = []
-        roots_map = {}
+        slot = None

         blob = None
         blob = None

-        loop = retry.RetryLoop(num_retries, self._check_loop_result,
-                               backoff_start=2)
-        for tries_left in loop:
-            try:
-                sorted_roots = self.map_new_services(
-                    roots_map, locator,
-                    force_rebuild=(tries_left < num_retries),
-                    need_writable=False,
-                    headers=headers)
-            except Exception as error:
-                loop.save_result(error)
-                continue
+        try:
+            locator = KeepLocator(loc_s)
+            if method == "GET":
+                slot, first = self.block_cache.reserve_cache(locator.md5sum)
+                if not first:
+                    self.hits_counter.add(1)
+                    blob = slot.get()
+                    if blob is None:
+                        raise arvados.errors.KeepReadError(
+                            "failed to read {}".format(loc_s))
+                    return blob
+
+            self.misses_counter.add(1)
+
+            if headers is None:
+                headers = {}
+            headers['X-Request-Id'] = (request_id or
+                                        (hasattr(self, 'api_client') and self.api_client.request_id) or
+                                        arvados.util.new_request_id())
+
+            # If the locator has hints specifying a prefix (indicating a
+            # remote keepproxy) or the UUID of a local gateway service,
+            # read data from the indicated service(s) instead of the usual
+            # list of local disk services.
+            hint_roots = ['http://keep.{}.arvadosapi.com/'.format(hint[2:])
+                          for hint in locator.hints if hint.startswith('K@') and len(hint) == 7]
+            hint_roots.extend([self._gateway_services[hint[2:]]['_service_root']
+                               for hint in locator.hints if (
+                                       hint.startswith('K@') and
+                                       len(hint) == 29 and
+                                       self._gateway_services.get(hint[2:])
+                                       )])
+            # Map root URLs to their KeepService objects.
+            roots_map = {
+                root: self.KeepService(root, self._user_agent_pool,
+                                       upload_counter=self.upload_counter,
+                                       download_counter=self.download_counter,
+                                       headers=headers,
+                                       insecure=self.insecure)
+                for root in hint_roots
+            }
+
+            # See #3147 for a discussion of the loop implementation.  Highlights:
+            # * Refresh the list of Keep services after each failure, in case
+            #   it's being updated.
+            # * Retry until we succeed, we're out of retries, or every available
+            #   service has returned permanent failure.
+            sorted_roots = []
+            roots_map = {}
+            loop = retry.RetryLoop(num_retries, self._check_loop_result,
+                                   backoff_start=2)
+            for tries_left in loop:
+                try:
+                    sorted_roots = self.map_new_services(
+                        roots_map, locator,
+                        force_rebuild=(tries_left < num_retries),
+                        need_writable=False,
+                        headers=headers)
+                except Exception as error:
+                    loop.save_result(error)
+                    continue

 
 

-            # Query KeepService objects that haven't returned
-            # permanent failure, in our specified shuffle order.
-            services_to_try = [roots_map[root]
-                               for root in sorted_roots
-                               if roots_map[root].usable()]
-            for keep_service in services_to_try:
-                blob = keep_service.get(locator, method=method, timeout=self.current_timeout(num_retries-tries_left))
-                if blob is not None:
-                    break
-            loop.save_result((blob, len(services_to_try)))
-
-        # Always cache the result, then return it if we succeeded.
-        if method == "GET":
-            slot.set(blob)
-            self.block_cache.cap_cache()
-        if loop.success():
-            if method == "HEAD":
-                return True
-            else:
+                # Query KeepService objects that haven't returned
+                # permanent failure, in our specified shuffle order.
+                services_to_try = [roots_map[root]
+                                   for root in sorted_roots
+                                   if roots_map[root].usable()]
+                for keep_service in services_to_try:
+                    blob = keep_service.get(locator, method=method, timeout=self.current_timeout(num_retries-tries_left))
+                    if blob is not None:
+                        break
+                loop.save_result((blob, len(services_to_try)))
+
+            # Always cache the result, then return it if we succeeded.
+            if loop.success():

                 return blob
                 return blob

+        finally:
+            if slot is not None:
+                slot.set(blob)
+                self.block_cache.cap_cache()

 
         # Q: Including 403 is necessary for the Keep tests to continue
         # passing, but maybe they should expect KeepReadError instead?
 
         # Q: Including 403 is necessary for the Keep tests to continue
         # passing, but maybe they should expect KeepReadError instead?


@@ -1090,7 +1117,7 @@ class KeepClient(object):
                 "{} not found".format(loc_s), service_errors)
         else:
             raise arvados.errors.KeepReadError(
                 "{} not found".format(loc_s), service_errors)
         else:
             raise arvados.errors.KeepReadError(

-                "failed to read {}".format(loc_s), service_errors, label="service")
+                "failed to read {} after {}".format(loc_s, loop.attempts_str()), service_errors, label="service")

 
     @retry.retry_method
     def put(self, data, copies=2, num_retries=None, request_id=None):
 
     @retry.retry_method
     def put(self, data, copies=2, num_retries=None, request_id=None):


@@ -1144,7 +1171,7 @@ class KeepClient(object):
                 loop.save_result(error)
                 continue
 
                 loop.save_result(error)
                 continue
 

-            writer_pool = KeepClient.KeepWriterThreadPool(data=data, 
+            writer_pool = KeepClient.KeepWriterThreadPool(data=data,

                                                         data_hash=data_hash,
                                                         copies=copies - done,
                                                         max_service_replicas=self.max_replicas_per_service,
                                                         data_hash=data_hash,
                                                         copies=copies - done,
                                                         max_service_replicas=self.max_replicas_per_service,


@@ -1169,8 +1196,8 @@ class KeepClient(object):
                               for key in sorted_roots
                               if roots_map[key].last_result()['error'])
             raise arvados.errors.KeepWriteError(
                               for key in sorted_roots
                               if roots_map[key].last_result()['error'])
             raise arvados.errors.KeepWriteError(

-                "failed to write {} (wanted {} copies but wrote {})".format(
-                    data_hash, copies, writer_pool.done()), service_errors, label="service")
+                "failed to write {} after {} (wanted {} copies but wrote {})".format(
+                    data_hash, loop.attempts_str(), copies, writer_pool.done()), service_errors, label="service")

 
     def local_store_put(self, data, copies=1, num_retries=None):
         """A stub for put().
 
     def local_store_put(self, data, copies=1, num_retries=None):
         """A stub for put().


@@ -1204,5 +1231,17 @@ class KeepClient(object):
         with open(os.path.join(self.local_store, locator.md5sum), 'rb') as f:
             return f.read()
 
         with open(os.path.join(self.local_store, locator.md5sum), 'rb') as f:
             return f.read()
 

+    def local_store_head(self, loc_s, num_retries=None):
+        """Companion to local_store_put()."""
+        try:
+            locator = KeepLocator(loc_s)
+        except ValueError:
+            raise arvados.errors.NotFoundError(
+                "Invalid data locator: '%s'" % loc_s)
+        if locator.md5sum == config.EMPTY_BLOCK_LOCATOR.split('+')[0]:
+            return True
+        if os.path.exists(os.path.join(self.local_store, locator.md5sum)):
+            return True
+

     def is_cached(self, locator):
         return self.block_cache.reserve_cache(expect_hash)
     def is_cached(self, locator):
         return self.block_cache.reserve_cache(expect_hash)