fix(longhorn): Last try to fix the oauth2 problem

clusters/k8s01/longhorn/oauth2.yaml

@@ -12,8 +12,8 @@ sops:
     azure_kv: []
     hc_vault: []
     age: []
-    lastmodified: "2022-01-22T04:32:37Z"
-    mac: ENC[AES256_GCM,data:CsDXgX6gSJdETIUJRTtfJMoTgFHyzcRLCaXPakUJoayExgte4YAAiyaLTqD2eKrPyWCiJRW/C5uYlrBf5GyQu/K4fQrPM66p592yMt3ppi2vZKm+oCmU7ZaDSTE366gOuoyVupd/kdDt2/tjus260/Sv6cV93pa4R73Ehx8Apjc=,iv:diY/ilmzkUhnvEwqIiBS6COWJpuHcMEL1AdIkVCYWC0=,tag:xm0WRFTXNIoIaMAV/qEmlQ==,type:str]
+    lastmodified: "2022-01-22T04:57:34Z"
+    mac: ENC[AES256_GCM,data:rf0b+1hcZrraB77rwRLlh+hyOuMQYKt/v1BzdtyjVZ5ZYRPkq4t4491+gSJXevKjb2Bk9hqpsxSK9NI5zbthTvWeFAUuWFQXgeXzEISMHSt6KVwA1Ty5Tv+8mMObPVYwS07cz39LZCRyQGORXSZ/xLsZrX0Tv/oHAe3l4thWfh8=,iv:izi2x1wYfjusmC5CPt43tQl9XnSG8iPvyyV7TFNdG2w=,tag:HRiJJ5iCQF5FxdnfAt9YOQ==,type:str]
     pgp:
         - created_at: "2022-01-22T04:32:36Z"
           enc: |-
@@ -106,6 +106,8 @@ spec:
                       topologyKey: kubernetes.io/hostname
         ingress:
             enabled: true
+            annotations:
+                nginx.ingress.kubernetes.io/configuration-snippet: subrequest_output_buffer_size 8k;
             path: /oauth2
             pathType: Prefix
             hosts:
@@ -127,8 +129,8 @@ sops:
     azure_kv: []
     hc_vault: []
     age: []
-    lastmodified: "2022-01-22T04:32:37Z"
-    mac: ENC[AES256_GCM,data:CsDXgX6gSJdETIUJRTtfJMoTgFHyzcRLCaXPakUJoayExgte4YAAiyaLTqD2eKrPyWCiJRW/C5uYlrBf5GyQu/K4fQrPM66p592yMt3ppi2vZKm+oCmU7ZaDSTE366gOuoyVupd/kdDt2/tjus260/Sv6cV93pa4R73Ehx8Apjc=,iv:diY/ilmzkUhnvEwqIiBS6COWJpuHcMEL1AdIkVCYWC0=,tag:xm0WRFTXNIoIaMAV/qEmlQ==,type:str]
+    lastmodified: "2022-01-22T04:57:34Z"
+    mac: ENC[AES256_GCM,data:rf0b+1hcZrraB77rwRLlh+hyOuMQYKt/v1BzdtyjVZ5ZYRPkq4t4491+gSJXevKjb2Bk9hqpsxSK9NI5zbthTvWeFAUuWFQXgeXzEISMHSt6KVwA1Ty5Tv+8mMObPVYwS07cz39LZCRyQGORXSZ/xLsZrX0Tv/oHAe3l4thWfh8=,iv:izi2x1wYfjusmC5CPt43tQl9XnSG8iPvyyV7TFNdG2w=,tag:HRiJJ5iCQF5FxdnfAt9YOQ==,type:str]
     pgp:
         - created_at: "2022-01-22T04:32:36Z"
           enc: |-