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failoverservice.go
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/
failoverservice.go
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package failoverservice
/*
Copyright 2018 - 2022 Crunchy Data Solutions, Inc.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
import (
"encoding/json"
"github.com/crunchydata/postgres-operator/internal/apiserver"
msgs "github.com/crunchydata/postgres-operator/pkg/apiservermsgs"
"github.com/gorilla/mux"
log "github.com/sirupsen/logrus"
"net/http"
)
// CreateFailoverHandler ...
// pgo failover mycluster
func CreateFailoverHandler(w http.ResponseWriter, r *http.Request) {
// swagger:operation POST /failover failoverservice failover
/*```
Performs a manual failover.
*/
// ---
// produces:
// - application/json
// parameters:
// - name: "Create Failover Request"
// in: "body"
// schema:
// "$ref": "#/definitions/CreateFailoverRequest"
// responses:
// '200':
// description: Output
// schema:
// "$ref": "#/definitions/CreateFailoverResponse"
var ns string
log.Debug("failoverservice.CreateFailoverHandler called")
var request msgs.CreateFailoverRequest
_ = json.NewDecoder(r.Body).Decode(&request)
username, err := apiserver.Authn(apiserver.CREATE_FAILOVER_PERM, w, r)
if err != nil {
return
}
w.Header().Set("WWW-Authenticate", `Basic realm="Restricted"`)
w.Header().Set("Content-Type", "application/json")
w.WriteHeader(http.StatusOK)
resp := msgs.CreateFailoverResponse{}
resp.Status = msgs.Status{Code: msgs.Ok, Msg: ""}
if request.ClientVersion != msgs.PGO_VERSION {
resp.Status = msgs.Status{Code: msgs.Error, Msg: apiserver.VERSION_MISMATCH_ERROR}
json.NewEncoder(w).Encode(resp)
return
}
ns, err = apiserver.GetNamespace(apiserver.Clientset, username, request.Namespace)
if err != nil {
resp.Status = msgs.Status{Code: msgs.Error, Msg: err.Error()}
json.NewEncoder(w).Encode(resp)
return
}
resp = CreateFailover(&request, ns, username)
json.NewEncoder(w).Encode(resp)
}
// QueryFailoverHandler ...
// pgo failover mycluster --query
func QueryFailoverHandler(w http.ResponseWriter, r *http.Request) {
// swagger:operation GET /failover/{name} failoverservice failover-service
/*```
Prints the list of failover candidates.
*/
// ---
// produces:
// - application/json
// parameters:
// - name: "name"
// description: "Cluster Name"
// in: "path"
// type: "string"
// required: true
// - name: "version"
// description: "Client Version"
// in: "path"
// type: "string"
// required: true
// - name: "namespace"
// description: "Namespace"
// in: "path"
// type: "string"
// required: true
// responses:
// '200':
// description: Output
// schema:
// "$ref": "#/definitions/QueryFailoverResponse"
var ns string
vars := mux.Vars(r)
name := vars["name"]
clientVersion := r.URL.Query().Get("version")
namespace := r.URL.Query().Get("namespace")
log.Debugf("QueryFailoverHandler parameters version[%s] namespace [%s] name [%s]", clientVersion, namespace, name)
username, err := apiserver.Authn(apiserver.CREATE_FAILOVER_PERM, w, r)
if err != nil {
return
}
w.Header().Set("WWW-Authenticate", `Basic realm="Restricted"`)
w.Header().Set("Content-Type", "application/json")
w.WriteHeader(http.StatusOK)
resp := msgs.QueryFailoverResponse{}
resp.Status = msgs.Status{Code: msgs.Ok, Msg: ""}
if clientVersion != msgs.PGO_VERSION {
resp.Status = msgs.Status{Code: msgs.Error, Msg: apiserver.VERSION_MISMATCH_ERROR}
json.NewEncoder(w).Encode(resp)
return
}
ns, err = apiserver.GetNamespace(apiserver.Clientset, username, namespace)
if err != nil {
resp.Status = msgs.Status{Code: msgs.Error, Msg: err.Error()}
json.NewEncoder(w).Encode(resp)
return
}
resp = QueryFailover(name, ns)
json.NewEncoder(w).Encode(resp)
}