*: support raft learner in etcd

.words

@@ -104,3 +104,5 @@ PermitWithoutStream
 __lostleader
 ErrConnClosing
 unfreed
+grpcAddr
+clientURLs

Documentation/dev-guide/api_reference_v3.md

@@ -37,6 +37,7 @@ This is a generated documentation. Please read the proto files for more.
 | MemberRemove | MemberRemoveRequest | MemberRemoveResponse | MemberRemove removes an existing member from the cluster. |
 | MemberUpdate | MemberUpdateRequest | MemberUpdateResponse | MemberUpdate updates the member configuration. |
 | MemberList | MemberListRequest | MemberListResponse | MemberList lists all the members in the cluster. |
+| MemberPromote | MemberPromoteRequest | MemberPromoteResponse | MemberPromote promotes a member from raft learner (non-voting) to raft voting member. |
 
 
 
@@ -609,6 +610,7 @@ Empty field.
 | name | name is the human-readable name of the member. If the member is not started, the name will be an empty string. | string |
 | peerURLs | peerURLs is the list of URLs the member exposes to the cluster for communication. | (slice of) string |
 | clientURLs | clientURLs is the list of URLs the member exposes to clients for communication. If the member is not started, clientURLs will be empty. | (slice of) string |
+| isLearner | isLearner indicates if the member is raft learner. | bool |
 
 
 
@@ -617,6 +619,7 @@ Empty field.
 | Field | Description | Type |
 | ----- | ----------- | ---- |
 | peerURLs | peerURLs is the list of URLs the added member will use to communicate with the cluster. | (slice of) string |
+| isLearner | isLearner indicates if the added member is raft learner. | bool |
 
 
 
@@ -645,6 +648,23 @@ Empty field.
 
 
 
+##### message `MemberPromoteRequest` (etcdserver/etcdserverpb/rpc.proto)
+
+| Field | Description | Type |
+| ----- | ----------- | ---- |
+| ID | ID is the member ID of the member to promote. | uint64 |
+
+
+
+##### message `MemberPromoteResponse` (etcdserver/etcdserverpb/rpc.proto)
+
+| Field | Description | Type |
+| ----- | ----------- | ---- |
+| header |  | ResponseHeader |
+| members | members is a list of all members after promoting the member. | (slice of) Member |
+
+
+
 ##### message `MemberRemoveRequest` (etcdserver/etcdserverpb/rpc.proto)
 
 | Field | Description | Type |
@@ -819,6 +839,7 @@ Empty field.
 | raftAppliedIndex | raftAppliedIndex is the current raft applied index of the responding member. | uint64 |
 | errors | errors contains alarm/health information and status. | (slice of) string |
 | dbSizeInUse | dbSizeInUse is the size of the backend database logically in use, in bytes, of the responding member. | int64 |
+| isLearner | isLearner indicates if the member is raft learner. | bool |
 
 
 

Documentation/dev-guide/apispec/swagger/rpc.swagger.json

@@ -501,6 +501,33 @@
         }
       }
     },
+    "/v3/cluster/member/promote": {
+      "post": {
+        "tags": [
+          "Cluster"
+        ],
+        "summary": "MemberPromote promotes a member from raft learner (non-voting) to raft voting member.",
+        "operationId": "MemberPromote",
+        "parameters": [
+          {
+            "name": "body",
+            "in": "body",
+            "required": true,
+            "schema": {
+              "$ref": "#/definitions/etcdserverpbMemberPromoteRequest"
+            }
+          }
+        ],
+        "responses": {
+          "200": {
+            "description": "A successful response.",
+            "schema": {
+              "$ref": "#/definitions/etcdserverpbMemberPromoteResponse"
+            }
+          }
+        }
+      }
+    },
     "/v3/cluster/member/remove": {
       "post": {
         "tags": [
@@ -820,7 +847,7 @@
           "200": {
             "description": "A successful response.(streaming responses)",
             "schema": {
-              "$ref": "#/definitions/etcdserverpbLeaseKeepAliveResponse"
+              "$ref": "#/x-stream-definitions/etcdserverpbLeaseKeepAliveResponse"
             }
           }
         }
@@ -1009,7 +1036,7 @@
           "200": {
             "description": "A successful response.(streaming responses)",
             "schema": {
-              "$ref": "#/definitions/etcdserverpbSnapshotResponse"
+              "$ref": "#/x-stream-definitions/etcdserverpbSnapshotResponse"
             }
           }
         }
@@ -1091,7 +1118,7 @@
           "200": {
             "description": "A successful response.(streaming responses)",
             "schema": {
-              "$ref": "#/definitions/etcdserverpbWatchResponse"
+              "$ref": "#/x-stream-definitions/etcdserverpbWatchResponse"
             }
           }
         }
@@ -1882,6 +1909,11 @@
             "type": "string"
           }
         },
+        "isLearner": {
+          "description": "isLearner indicates if the member is raft learner.",
+          "type": "boolean",
+          "format": "boolean"
+        },
         "name": {
           "description": "name is the human-readable name of the member. If the member is not started, the name will be an empty string.",
           "type": "string"
@@ -1898,6 +1930,11 @@
     "etcdserverpbMemberAddRequest": {
       "type": "object",
       "properties": {
+        "isLearner": {
+          "description": "isLearner indicates if the added member is raft learner.",
+          "type": "boolean",
+          "format": "boolean"
+        },
         "peerURLs": {
           "description": "peerURLs is the list of URLs the added member will use to communicate with the cluster.",
           "type": "array",
@@ -1944,6 +1981,31 @@
         }
       }
     },
+    "etcdserverpbMemberPromoteRequest": {
+      "type": "object",
+      "properties": {
+        "ID": {
+          "description": "ID is the member ID of the member to promote.",
+          "type": "string",
+          "format": "uint64"
+        }
+      }
+    },
+    "etcdserverpbMemberPromoteResponse": {
+      "type": "object",
+      "properties": {
+        "header": {
+          "$ref": "#/definitions/etcdserverpbResponseHeader"
+        },
+        "members": {
+          "description": "members is a list of all members after promoting the member.",
+          "type": "array",
+          "items": {
+            "$ref": "#/definitions/etcdserverpbMember"
+          }
+        }
+      }
+    },
     "etcdserverpbMemberRemoveRequest": {
       "type": "object",
       "properties": {
@@ -2266,6 +2328,11 @@
         "header": {
           "$ref": "#/definitions/etcdserverpbResponseHeader"
         },
+        "isLearner": {
+          "description": "isLearner indicates if the member is raft learner.",
+          "type": "boolean",
+          "format": "boolean"
+        },
         "leader": {
           "description": "leader is the member ID which the responding member believes is the current leader.",
           "type": "string",
@@ -2508,6 +2575,43 @@
           "format": "int64"
         }
       }
+    },
+    "protobufAny": {
+      "type": "object",
+      "properties": {
+        "type_url": {
+          "type": "string"
+        },
+        "value": {
+          "type": "string",
+          "format": "byte"
+        }
+      }
+    },
+    "runtimeStreamError": {
+      "type": "object",
+      "properties": {
+        "details": {
+          "type": "array",
+          "items": {
+            "$ref": "#/definitions/protobufAny"
+          }
+        },
+        "grpc_code": {
+          "type": "integer",
+          "format": "int32"
+        },
+        "http_code": {
+          "type": "integer",
+          "format": "int32"
+        },
+        "http_status": {
+          "type": "string"
+        },
+        "message": {
+          "type": "string"
+        }
+      }
     }
   },
   "securityDefinitions": {
@@ -2521,5 +2625,43 @@
     {
       "ApiKey": []
     }
-  ]
+  ],
+  "x-stream-definitions": {
+    "etcdserverpbLeaseKeepAliveResponse": {
+      "properties": {
+        "error": {
+          "$ref": "#/definitions/runtimeStreamError"
+        },
+        "result": {
+          "$ref": "#/definitions/etcdserverpbLeaseKeepAliveResponse"
+        }
+      },
+      "title": "Stream result of etcdserverpbLeaseKeepAliveResponse",
+      "type": "object"
+    },
+    "etcdserverpbSnapshotResponse": {
+      "properties": {
+        "error": {
+          "$ref": "#/definitions/runtimeStreamError"
+        },
+        "result": {
+          "$ref": "#/definitions/etcdserverpbSnapshotResponse"
+        }
+      },
+      "title": "Stream result of etcdserverpbSnapshotResponse",
+      "type": "object"
+    },
+    "etcdserverpbWatchResponse": {
+      "properties": {
+        "error": {
+          "$ref": "#/definitions/runtimeStreamError"
+        },
+        "result": {
+          "$ref": "#/definitions/etcdserverpbWatchResponse"
+        }
+      },
+      "title": "Stream result of etcdserverpbWatchResponse",
+      "type": "object"
+    }
+  }
 }

Documentation/dev-guide/apispec/swagger/v3election.swagger.json

@@ -77,7 +77,7 @@
           "200": {
             "description": "A successful response.(streaming responses)",
             "schema": {
-              "$ref": "#/definitions/v3electionpbLeaderResponse"
+              "$ref": "#/x-stream-definitions/v3electionpbLeaderResponse"
             }
           }
         },
@@ -212,6 +212,43 @@
         }
       }
     },
+    "protobufAny": {
+      "type": "object",
+      "properties": {
+        "type_url": {
+          "type": "string"
+        },
+        "value": {
+          "type": "string",
+          "format": "byte"
+        }
+      }
+    },
+    "runtimeStreamError": {
+      "type": "object",
+      "properties": {
+        "grpc_code": {
+          "type": "integer",
+          "format": "int32"
+        },
+        "http_code": {
+          "type": "integer",
+          "format": "int32"
+        },
+        "message": {
+          "type": "string"
+        },
+        "http_status": {
+          "type": "string"
+        },
+        "details": {
+          "type": "array",
+          "items": {
+            "$ref": "#/definitions/protobufAny"
+          }
+        }
+      }
+    },
     "v3electionpbCampaignRequest": {
       "type": "object",
       "properties": {
@@ -330,5 +367,19 @@
         }
       }
     }
+  },
+  "x-stream-definitions": {
+    "v3electionpbLeaderResponse": {
+      "type": "object",
+      "properties": {
+        "result": {
+          "$ref": "#/definitions/v3electionpbLeaderResponse"
+        },
+        "error": {
+          "$ref": "#/definitions/runtimeStreamError"
+        }
+      },
+      "title": "Stream result of v3electionpbLeaderResponse"
+    }
   }
 }