Add pidfile config for gunicorn

doc/source/python/python_server.md

@@ -187,6 +187,7 @@ Python Server can be configured using environmental variables or command line fl
 | `--threads`             | `GUNICORN_THREADS`                     | `10`          | Number of threads to run per Gunicorn worker.                                                                                                                      |
 | `--max-requests`        | `GUNICORN_MAX_REQUESTS`                | `0`           | Maximum number of requests gunicorn worker will process before restarting.                                                                                         |
 | `--max-requests-jitter` | `GUNICORN_MAX_REQUESTS_JITTER`         | `0`           | Maximum random jitter to add to max-requests.                                                                                                                      |
+| `--pidfile`             | N/A                                    | None          | A file path to use for the Gunicorn PID file.                                                                                                                      |
 | `--single-threaded`     | `FLASK_SINGLE_THREADED`                | `0`           | Force the Flask app to run single-threaded. Also applies to Gunicorn. Can be `0` or `1`.                                                                           |
 | N/A                     | `FILTER_METRICS_ACCESS_LOGS`           | `not debug`   | Filter out logs related to Prometheus accessing the metrics port. By default enabled in production and disabled in debug mode.                                     |
 | N/A                     | `PREDICTIVE_UNIT_METRICS_ENDPOINT`     | `/metrics`    | Endpoint name for Prometheus metrics. In k8s deployment default is `/prometheus`.                                                                                  |

operator/hack/create_graph_openapi_schema.py

@@ -3,14 +3,20 @@
 import sys
 import copy
 
+
 def getOpts(cmd_line_args):
-    parser = argparse.ArgumentParser(description="Create graph OpenAPI schema patch. Takes an input template and output Kustomize path for given number of levels")
+    parser = argparse.ArgumentParser(
+        description="Create graph OpenAPI schema patch. Takes an input template and output Kustomize path for given number of levels"
+    )
     parser.add_argument("template", help="the yaml template for 1 level of the graph")
     parser.add_argument("path", help="the output path to save result")
-    parser.add_argument("--levels", help="the number of levels to create", type=int, default=10)
+    parser.add_argument(
+        "--levels", help="the number of levels to create", type=int, default=10
+    )
     opts = parser.parse_args(cmd_line_args)
     return opts
 
+
 def expand_tmpl(filename, levels):
     with open(filename, "r") as stream:
         y = yaml.safe_load(stream)
@@ -19,15 +25,20 @@ def expand_tmpl(filename, levels):
             child = copy.deepcopy(tmpl)
             tmpl["properties"]["children"]["items"] = child
             tmpl = child
-            if i == levels-1:
+            if i == levels - 1:
                 del tmpl["properties"]["children"]
         # add replace for second and third schema version
         y.append(copy.deepcopy(y[0]))
-        y[1]["path"] = "/spec/versions/1/schema/openAPIV3Schema/properties/spec/properties/predictors/items/properties/graph"
+        y[1][
+            "path"
+        ] = "/spec/versions/1/schema/openAPIV3Schema/properties/spec/properties/predictors/items/properties/graph"
         y.append(copy.deepcopy(y[0]))
-        y[2]["path"] = "/spec/versions/2/schema/openAPIV3Schema/properties/spec/properties/predictors/items/properties/graph"
+        y[2][
+            "path"
+        ] = "/spec/versions/2/schema/openAPIV3Schema/properties/spec/properties/predictors/items/properties/graph"
         return y
 
+
 def main(argv):
     opts = getOpts(argv[1:])
     print(opts)
@@ -36,5 +47,6 @@ def main(argv):
     with open(opts.path, "w") as outfile:
         outfile.write(fdata)
 
+
 if __name__ == "__main__":
-    main(sys.argv)
+    main(sys.argv)

operator/hack/csv_hack.py

@@ -2,23 +2,26 @@
 import argparse
 import sys
 
+
 def getOpts(cmd_line_args):
     parser = argparse.ArgumentParser(description="remove csv CRD versions")
     parser.add_argument("path", help="the output path to save result")
     opts = parser.parse_args(cmd_line_args)
     return opts
 
+
 def remove_versions(filename):
     with open(filename, "r") as stream:
         y = yaml.safe_load(stream)
         del y["spec"]["customresourcedefinitions"]["owned"][2]
         del y["spec"]["customresourcedefinitions"]["owned"][1]
         return y
 
+
 def str_presenter(dumper, data):
-  if len(data.splitlines()) > 1:  # check for multiline string
-    return dumper.represent_scalar('tag:yaml.org,2002:str', data, style='|')
-  return dumper.represent_scalar('tag:yaml.org,2002:str', data)
+    if len(data.splitlines()) > 1:  # check for multiline string
+        return dumper.represent_scalar("tag:yaml.org,2002:str", data, style="|")
+    return dumper.represent_scalar("tag:yaml.org,2002:str", data)
 
 
 def main(argv):
@@ -32,4 +35,4 @@ def main(argv):
 
 if __name__ == "__main__":
     yaml.add_representer(str, str_presenter)
-    main(sys.argv)
+    main(sys.argv)

operator/helm/split_resources.py

@@ -20,7 +20,7 @@
 HELM_CERTMANAGER_IF_START = "{{- if .Values.certManager.enabled -}}\n"
 HELM_NOT_CERTMANAGER_IF_START = "{{- if not .Values.certManager.enabled -}}\n"
 HELM_VERSION_IF_START = (
-'{{- if semverCompare ">=1.15.0" .Capabilities.KubeVersion.GitVersion }}\n'
+    '{{- if semverCompare ">=1.15.0" .Capabilities.KubeVersion.GitVersion }}\n'
 )
 HELM_KUBEFLOW_IF_START = "{{- if .Values.kubeflow }}\n"
 HELM_KUBEFLOW_IF_NOT_START = "{{- if not .Values.kubeflow }}\n"
@@ -95,10 +95,21 @@ def helm_release(value: str):
             filename = args.folder + "/" + (kind + "_" + name).lower() + ".yaml"
             print(filename)
             print(version)
-            if filename == (args.folder + "/" + "customresourcedefinition_seldondeployments.machinelearning.seldon.io.yaml") \
-                and version == "apiextensions.k8s.io/v1":
+            if (
+                filename
+                == (
+                    args.folder
+                    + "/"
+                    + "customresourcedefinition_seldondeployments.machinelearning.seldon.io.yaml"
+                )
+                and version == "apiextensions.k8s.io/v1"
+            ):
                 print("MATCH")
-                filename = args.folder + "/" + "customresourcedefinition_v1_seldondeployments.machinelearning.seldon.io.yaml"
+                filename = (
+                    args.folder
+                    + "/"
+                    + "customresourcedefinition_v1_seldondeployments.machinelearning.seldon.io.yaml"
+                )
 
             print("Processing ", file)
             # Update common labels
@@ -368,16 +379,28 @@ def helm_release(value: str):
                 fdata = HELM_CERTMANAGER_IF_START + fdata + HELM_IF_END
             elif name == "seldon-webhook-server-cert" and kind == "secret":
                 fdata = HELM_NOT_CERTMANAGER_IF_START + fdata + HELM_IF_END
-            elif name == "seldondeployments.machinelearning.seldon.io" and \
-                     version == "apiextensions.k8s.io/v1beta1":
-                fdata = HELM_CRD_IF_START + \
-                        HELM_K8S_V1BETA1_CRD_IF_START + fdata + \
-                        HELM_IF_END + HELM_IF_END
-            elif name == "seldondeployments.machinelearning.seldon.io" and \
-                     version == "apiextensions.k8s.io/v1":
-                fdata = HELM_CRD_IF_START + \
-                        HELM_K8S_V1_CRD_IF_START + fdata + \
-                        HELM_IF_END + HELM_IF_END
+            elif (
+                name == "seldondeployments.machinelearning.seldon.io"
+                and version == "apiextensions.k8s.io/v1beta1"
+            ):
+                fdata = (
+                    HELM_CRD_IF_START
+                    + HELM_K8S_V1BETA1_CRD_IF_START
+                    + fdata
+                    + HELM_IF_END
+                    + HELM_IF_END
+                )
+            elif (
+                name == "seldondeployments.machinelearning.seldon.io"
+                and version == "apiextensions.k8s.io/v1"
+            ):
+                fdata = (
+                    HELM_CRD_IF_START
+                    + HELM_K8S_V1_CRD_IF_START
+                    + fdata
+                    + HELM_IF_END
+                    + HELM_IF_END
+                )
             elif kind == "service" and name == "seldon-webhook-service":
                 fdata = HELM_CREATERESOURCES_IF_START + fdata + HELM_IF_END
             elif kind == "configmap" and name == "seldon-config":
@@ -468,7 +491,7 @@ def helm_release(value: str):
     )
     webhookData = webhookData + "\n" + HELM_IF_END
 
-    print("Webhook data len",len(webhookData))
+    print("Webhook data len", len(webhookData))
 
     filename = args.folder + "/" + "webhook.yaml"
     with open(filename, "w") as outfile:

python/Makefile

@@ -99,7 +99,7 @@ setup_linter:
 
 fmt:
 	black \
-		./ ../testing ../operator/helm ../operator/seldon-operator/hack \
+		./ ../testing ../operator/helm ../operator/hack \
 		--exclude "(testing/scripts/proto|seldon_core/proto/|.eggs|.tox)"
 
 lint: licenses

python/licenses/license.txt

@@ -147,7 +147,7 @@ SOFTWARE.
 
 
 Markdown
-3.3
+3.3.1
 BSD License
 Copyright 2007, 2008 The Python Markdown Project (v. 1.7 and later)
 Copyright 2004, 2005, 2006 Yuri Takhteyev (v. 0.2-1.6b)

python/licenses/license_info.csv

@@ -4,7 +4,7 @@
 "Flask-OpenTracing","1.1.0","BSD License"
 "Jinja2","2.11.2","BSD License"
 "Keras-Preprocessing","1.1.2","MIT License"
-"Markdown","3.3","BSD License"
+"Markdown","3.3.1","BSD License"
 "MarkupSafe","1.1.1","BSD License"
 "PyYAML","5.3.1","MIT License"
 "Werkzeug","1.0.1","BSD License"

python/seldon_core/microservice.py

@@ -313,6 +313,10 @@ def main():
         help="Set metrics port of seldon service",
     )
 
+    parser.add_argument(
+        "--pidfile", type=str, default=None, help="A file path to use for the PID file",
+    )
+
     args = parser.parse_args()
     parameters = parse_parameters(json.loads(args.parameters))
 
@@ -399,6 +403,8 @@ def rest_prediction_server():
                     "max_requests_jitter": args.max_requests_jitter,
                     "post_worker_init": post_worker_init,
                 }
+                if args.pidfile is not None:
+                    options["pidfile"] = args.pidfile
                 app = seldon_microservice.get_rest_microservice(
                     user_object, seldon_metrics
                 )
@@ -461,6 +467,8 @@ def rest_metrics_server():
                 "max_requests_jitter": args.max_requests_jitter,
                 "post_worker_init": post_worker_init,
             }
+            if args.pidfile is not None:
+                options["pidfile"] = args.pidfile
             StandaloneApplication(app, options=options).run()
 
     logger.info("REST metrics microservice running on port %i", metrics_port)