Adding pessimistic sqlalchemy disconnection handling

lemur/extensions.py

@@ -3,7 +3,15 @@
     :copyright: (c) 2018 by Netflix Inc., see AUTHORS for more
     :license: Apache, see LICENSE for more details.
 """
-from flask_sqlalchemy import SQLAlchemy
+from flask_sqlalchemy import SQLAlchemy as SA
+
+
+class SQLAlchemy(SA):
+    def apply_pool_defaults(self, app, options):
+        SA.apply_pool_defaults(self, app, options)
+        options["pool_pre_ping"] = True
+
+
 db = SQLAlchemy()
 
 from flask_migrate import Migrate

requirements-dev.txt

@@ -16,7 +16,7 @@ invoke==1.1.0
 mccabe==0.6.1             # via flake8
 nodeenv==1.3.2
 pkginfo==1.4.2            # via twine
-pre-commit==1.10.3
+pre-commit==1.10.4
 pycodestyle==2.3.1        # via flake8
 pyflakes==1.6.0           # via flake8
 pyyaml==3.13              # via aspy.yaml, pre-commit

requirements-docs.txt

@@ -15,14 +15,14 @@ asyncpool==1.0
 babel==2.6.0              # via sphinx
 bcrypt==3.1.4
 blinker==1.4
-boto3==1.7.59
-botocore==1.10.59
+boto3==1.7.61
+botocore==1.10.61
 certifi==2018.4.16
 cffi==1.11.5
 chardet==3.0.4
 click==6.7
 cloudflare==2.1.0
-cryptography==2.2.2
+cryptography==2.3
 dnspython3==1.15.0
 dnspython==1.15.0
 docutils==0.14
@@ -55,7 +55,7 @@ mock==2.0.0
 ndg-httpsclient==0.5.0
 packaging==17.1           # via sphinx
 paramiko==2.4.1
-pbr==4.1.0
+pbr==4.1.1
 pem==18.1.0
 psycopg2==2.7.5
 pyasn1-modules==0.2.2

requirements-tests.txt

@@ -8,9 +8,9 @@ asn1crypto==0.24.0        # via cryptography
 atomicwrites==1.1.5       # via pytest
 attrs==18.1.0             # via pytest
 aws-xray-sdk==0.95        # via moto
-boto3==1.7.61             # via moto
+boto3==1.7.62             # via moto
 boto==2.49.0              # via moto
-botocore==1.10.61         # via boto3, moto, s3transfer
+botocore==1.10.62         # via boto3, moto, s3transfer
 certifi==2018.4.16        # via requests
 cffi==1.11.5              # via cryptography
 chardet==3.0.4            # via requests
@@ -48,7 +48,7 @@ pytest==3.6.3
 python-dateutil==2.6.1    # via botocore, faker, freezegun, moto
 pytz==2018.5              # via moto
 pyyaml==3.13              # via pyaml
-requests-mock==1.5.0
+requests-mock==1.5.2
 requests==2.19.1          # via aws-xray-sdk, docker, moto, requests-mock, responses
 responses==0.9.0          # via moto
 s3transfer==0.1.13        # via boto3

requirements.txt

@@ -13,8 +13,8 @@ asn1crypto==0.24.0        # via cryptography
 asyncpool==1.0
 bcrypt==3.1.4             # via flask-bcrypt, paramiko
 blinker==1.4              # via flask-mail, flask-principal, raven
-boto3==1.7.61
-botocore==1.10.61         # via boto3, s3transfer
+boto3==1.7.62
+botocore==1.10.62         # via boto3, s3transfer
 certifi==2018.4.16
 cffi==1.11.5              # via bcrypt, cryptography, pynacl
 chardet==3.0.4            # via requests
@@ -49,7 +49,7 @@ markupsafe==1.0           # via jinja2, mako
 marshmallow-sqlalchemy==0.14.0
 marshmallow==2.15.3
 mock==2.0.0               # via acme
-ndg-httpsclient==0.5.0
+ndg-httpsclient==0.5.1
 paramiko==2.4.1
 pbr==4.1.1                # via mock
 pem==18.1.0