Feat: Add server to get redis cluster info (#128)

* fix: changes to make telepresence work * fix: change k8s version * feat: add server and router, without module * feat: add server to get cluster info * fix according to review comments Co-authored-by: Dina Yakovlev <dina.yakovlev@zooz.com>
PayU · Dec 15, 2021 · a1a57c9 · a1a57c9
1 parent 117b6fe
commit a1a57c9
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Showing 15 changed files with 229 additions and 4 deletions.
diff --git a/Dockerfile b/Dockerfile
@@ -27,6 +27,8 @@ RUN go mod download
 COPY main.go main.go
 COPY api/ api/
 COPY controllers/ controllers/
+COPY server/ server/
+COPY data/ data/
 
 # Build
 RUN CGO_ENABLED=0 GOOS=linux GOARCH=amd64 GO111MODULE=on go build -a -o manager main.go

diff --git a/config/manager/base/manager.yaml b/config/manager/base/manager.yaml
@@ -36,6 +36,10 @@ spec:
           value: "admin"
         - name: REDISCLI_AUTH
           value: "adminpass"
+        - name: CLUSTER_VIEW_FILE
+          value: "cluster_data"
+        - name: CLUSTER_STATE_FILE
+          value: "cluster_state"
         volumeMounts:
         - name: redis-operator-config
           mountPath: "/usr/local/etc/"

diff --git a/controllers/configmap_controller.go b/controllers/configmap_controller.go
@@ -57,7 +57,7 @@ const ACLFilePropagationDuration time.Duration = time.Millisecond * 5000
 // Defines the time it takes for Redis to load the new config
 const ACLFileLoadDuration time.Duration = time.Millisecond * 500
 const redisConfigLabelKey string = "redis-cluster"
-const handleACLConfigErrorMessage = "Failed to handle ACL configuation"
+const handleACLConfigErrorMessage = "Failed to handle ACL configuration"
 const operatorConfigLabelKey string = "redis-operator"
 
 func (r *RedisConfigReconciler) syncConfig(latestConfigHash string, redisPods ...corev1.Pod) error {

diff --git a/controllers/rediscluster.go b/controllers/rediscluster.go
@@ -1,6 +1,7 @@
 package controllers
 
 import (
+	"encoding/json"
 	"fmt"
 	"reflect"
 	"sort"
@@ -15,6 +16,7 @@ import (
 
 	dbv1 "github.com/PayU/redis-operator/api/v1"
 	rediscli "github.com/PayU/redis-operator/controllers/rediscli"
+	clusterData "github.com/PayU/redis-operator/data"
 )
 
 var EMPTY struct{}
@@ -492,6 +494,8 @@ func (r *RedisClusterReconciler) forgetLostNodes(redisCluster *dbv1.RedisCluster
 	for id := range lostNodeIDSet {
 		r.forgetNode(healthyNodeIPs, id)
 	}
+	data, _ := json.MarshalIndent(clusterView, "", "")
+	clusterData.SaveRedisClusterView(data)
 	return nil
 }
 
@@ -716,6 +720,8 @@ func (r *RedisClusterReconciler) recoverCluster(redisCluster *dbv1.RedisCluster)
 	if err != nil || !complete {
 		return errors.Errorf("Cluster recovery not complete")
 	}
+	data, _ := json.MarshalIndent(clusterView, "", "")
+	clusterData.SaveRedisClusterView(data)
 	return nil
 }
 
@@ -816,6 +822,8 @@ func (r *RedisClusterReconciler) updateCluster(redisCluster *dbv1.RedisCluster)
 	if err = r.cleanupNodeList(clusterView.HealthyNodeIPs()); err != nil {
 		return err
 	}
+	data, _ := json.MarshalIndent(clusterView, "", "")
+	clusterData.SaveRedisClusterView(data)
 	return nil
 }
 
@@ -1089,5 +1097,8 @@ func (r *RedisClusterReconciler) isClusterComplete(redisCluster *dbv1.RedisClust
 			}
 		}
 	}
+	data, _ := json.MarshalIndent(clusterView, "", "")
+	clusterData.SaveRedisClusterView(data)
+
 	return true, nil
 }
diff --git a/controllers/rediscluster_controller.go b/controllers/rediscluster_controller.go
@@ -31,6 +31,7 @@ import (
 	corev1 "k8s.io/api/core/v1"
 
 	"github.com/PayU/redis-operator/controllers/rediscli"
+	clusterData "github.com/PayU/redis-operator/data"
 )
 
 const (
@@ -175,6 +176,8 @@ func (r *RedisClusterReconciler) Reconcile(req ctrl.Request) (ctrl.Result, error
 		break
 	}
 
+	clusterData.SaveRedisClusterState(string(r.State))
+
 	if err != nil {
 		r.Log.Error(err, "Handling error")
 	}

diff --git a/data/clusterData.go b/data/clusterData.go
@@ -0,0 +1,32 @@
+package data
+
+import (
+	"io/ioutil"
+	"os"
+)
+
+func SaveRedisClusterView(data []byte) {
+	fileName := os.Getenv("CLUSTER_VIEW_FILE")
+
+	_ = ioutil.WriteFile(fileName, data, 0644)
+}
+
+func GetClusterView() ([]byte, error) {
+	fileName := os.Getenv("CLUSTER_VIEW_FILE")
+
+	return ioutil.ReadFile(fileName)
+}
+
+func SaveRedisClusterState(s string) {
+	fileName := os.Getenv("CLUSTER_STATE_FILE")
+	_ = ioutil.WriteFile(fileName, []byte(s), 0644)
+}
+
+func GetRedisClusterState() string {
+	fileName := os.Getenv("CLUSTER_STATE_FILE")
+	byteValue, err := ioutil.ReadFile(fileName)
+	if err != nil {
+		return "NotExists"
+	}
+	return string(byteValue)
+}
diff --git a/go.mod b/go.mod
@@ -5,6 +5,7 @@ go 1.15
 require (
 	github.com/go-logr/logr v0.1.0
 	github.com/go-test/deep v1.0.7
+	github.com/labstack/echo/v4 v4.6.1
 	github.com/pkg/errors v0.9.1
 	golang.org/x/sync v0.0.0-20190911185100-cd5d95a43a6e
 	gopkg.in/yaml.v2 v2.3.0

diff --git a/go.sum b/go.sum
@@ -147,6 +147,7 @@ github.com/gogo/protobuf v1.1.1/go.mod h1:r8qH/GZQm5c6nD/R0oafs1akxWv10x8SbQlK7a
 github.com/gogo/protobuf v1.2.1/go.mod h1:hp+jE20tsWTFYpLwKvXlhS1hjn+gTNwPg2I6zVXpSg4=
 github.com/gogo/protobuf v1.3.1 h1:DqDEcV5aeaTmdFBePNpYsp3FlcVH/2ISVVM9Qf8PSls=
 github.com/gogo/protobuf v1.3.1/go.mod h1:SlYgWuQ5SjCEi6WLHjHCa1yvBfUnHcTbrrZtXPKa29o=
+github.com/golang-jwt/jwt v3.2.2+incompatible/go.mod h1:8pz2t5EyA70fFQQSrl6XZXzqecmYZeUEB8OUGHkxJ+I=
 github.com/golang/glog v0.0.0-20160126235308-23def4e6c14b/go.mod h1:SBH7ygxi8pfUlaOkMMuAQtPIUF8ecWP5IEl/CR7VP2Q=
 github.com/golang/groupcache v0.0.0-20160516000752-02826c3e7903/go.mod h1:cIg4eruTrX1D+g88fzRXU5OdNfaM+9IcxsU14FzY7Hc=
 github.com/golang/groupcache v0.0.0-20190129154638-5b532d6fd5ef h1:veQD95Isof8w9/WXiA+pa3tz3fJXkt5B7QaRBrM62gk=
@@ -227,6 +228,12 @@ github.com/kr/pty v1.1.1/go.mod h1:pFQYn66WHrOpPYNljwOMqo10TkYh1fy3cYio2l3bCsQ=
 github.com/kr/pty v1.1.5/go.mod h1:9r2w37qlBe7rQ6e1fg1S/9xpWHSnaqNdHD3WcMdbPDA=
 github.com/kr/text v0.1.0 h1:45sCR5RtlFHMR4UwH9sdQ5TC8v0qDQCHnXt+kaKSTVE=
 github.com/kr/text v0.1.0/go.mod h1:4Jbv+DJW3UT/LiOwJeYQe1efqtUx/iVham/4vfdArNI=
+github.com/labstack/echo v1.4.4 h1:1bEiBNeGSUKxcPDGfZ/7IgdhJJZx8wV/pICJh4W2NJI=
+github.com/labstack/echo v3.3.10+incompatible h1:pGRcYk231ExFAyoAjAfD85kQzRJCRI8bbnE7CX5OEgg=
+github.com/labstack/echo/v4 v4.6.1 h1:OMVsrnNFzYlGSdaiYGHbgWQnr+JM7NG+B9suCPie14M=
+github.com/labstack/echo/v4 v4.6.1/go.mod h1:RnjgMWNDB9g/HucVWhQYNQP9PvbYf6adqftqryo7s9k=
+github.com/labstack/gommon v0.3.0 h1:JEeO0bvc78PKdyHxloTKiF8BD5iGrH8T6MSeGvSgob0=
+github.com/labstack/gommon v0.3.0/go.mod h1:MULnywXg0yavhxWKc+lOruYdAhDwPK9wf0OL7NoOu+k=
 github.com/liggitt/tabwriter v0.0.0-20181228230101-89fcab3d43de h1:9TO3cAIGXtEhnIaL+V+BEER86oLrvS+kWobKpbJuye0=
 github.com/liggitt/tabwriter v0.0.0-20181228230101-89fcab3d43de/go.mod h1:zAbeS9B/r2mtpb6U+EI2rYA5OAXxsYw6wTamcNW+zcE=
 github.com/lithammer/dedent v1.1.0/go.mod h1:jrXYCQtgg0nJiN+StA2KgR7w6CiQNv9Fd/Z9BP0jIOc=
@@ -239,7 +246,15 @@ github.com/mailru/easyjson v0.0.0-20190626092158-b2ccc519800e/go.mod h1:C1wdFJiN
 github.com/mailru/easyjson v0.7.0 h1:aizVhC/NAAcKWb+5QsU1iNOZb4Yws5UO2I+aIprQITM=
 github.com/mailru/easyjson v0.7.0/go.mod h1:KAzv3t3aY1NaHWoQz1+4F1ccyAH66Jk7yos7ldAVICs=
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+github.com/mattn/go-colorable v0.1.2/go.mod h1:U0ppj6V5qS13XJ6of8GYAs25YV2eR4EVcfRqFIhoBtE=
+github.com/mattn/go-colorable v0.1.8 h1:c1ghPdyEDarC70ftn0y+A/Ee++9zz8ljHG1b13eJ0s8=
+github.com/mattn/go-colorable v0.1.8/go.mod h1:u6P/XSegPjTcexA+o6vUJrdnUu04hMope9wVRipJSqc=
 github.com/mattn/go-isatty v0.0.4/go.mod h1:M+lRXTBqGeGNdLjl/ufCoiOlB5xdOkqRJdNxMWT7Zi4=
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+github.com/mattn/go-isatty v0.0.9/go.mod h1:YNRxwqDuOph6SZLI9vUUz6OYw3QyUt7WiY2yME+cCiQ=
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+github.com/mattn/go-isatty v0.0.14 h1:yVuAays6BHfxijgZPzw+3Zlu5yQgKGP2/hcQbHb7S9Y=
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@@ -328,6 +343,11 @@ github.com/tidwall/pretty v1.0.0/go.mod h1:XNkn88O1ChpSDQmQeStsy+sBenx6DDtFZJxhV
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+github.com/valyala/bytebufferpool v1.0.0 h1:GqA5TC/0021Y/b9FG4Oi9Mr3q7XYx6KllzawFIhcdPw=
+github.com/valyala/bytebufferpool v1.0.0/go.mod h1:6bBcMArwyJ5K/AmCkWv1jt77kVWyCJ6HpOuEn7z0Csc=
+github.com/valyala/fasttemplate v1.0.1/go.mod h1:UQGH1tvbgY+Nz5t2n7tXsz52dQxojPUpymEIMZ47gx8=
+github.com/valyala/fasttemplate v1.2.1 h1:TVEnxayobAdVkhQfrfes2IzOB6o+z4roRkPF52WA1u4=
+github.com/valyala/fasttemplate v1.2.1/go.mod h1:KHLXt3tVN2HBp8eijSv/kGJopbvo7S+qRAEEKiv+SiQ=
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@@ -354,6 +374,8 @@ golang.org/x/crypto v0.0.0-20190611184440-5c40567a22f8/go.mod h1:yigFU9vqHzYiE8U
 golang.org/x/crypto v0.0.0-20190617133340-57b3e21c3d56/go.mod h1:yigFU9vqHzYiE8UmvKecakEJjdnWj3jj499lnFckfCI=
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 golang.org/x/crypto v0.0.0-20200220183623-bac4c82f6975/go.mod h1:LzIPMQfyMNhhGPhUkYOs5KpL4U8rLKemX1yGLhDgUto=
+golang.org/x/crypto v0.0.0-20210817164053-32db794688a5 h1:HWj/xjIHfjYU5nVXpTM0s39J9CbLn7Cc5a7IC5rwsMQ=
+golang.org/x/crypto v0.0.0-20210817164053-32db794688a5/go.mod h1:GvvjBRRGRdwPK5ydBHafDWAxML/pGHZbMvKqRZ5+Abc=
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@@ -378,6 +400,9 @@ golang.org/x/net v0.0.0-20190827160401-ba9fcec4b297/go.mod h1:z5CRVTTTmAJ677TzLL
 golang.org/x/net v0.0.0-20191004110552-13f9640d40b9/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
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+golang.org/x/net v0.0.0-20210226172049-e18ecbb05110/go.mod h1:m0MpNAwzfU5UDzcl9v0D8zg8gWTRqZa9RBIspLL5mdg=
+golang.org/x/net v0.0.0-20210913180222-943fd674d43e h1:+b/22bPvDYt4NPDcy4xAGCmON713ONAWFeY3Z7I3tR8=
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@@ -398,28 +423,45 @@ golang.org/x/sys v0.0.0-20181116152217-5ac8a444bdc5/go.mod h1:STP8DvDyc/dI5b8T5h
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diff --git a/hack/dev.Dockerfile b/hack/dev.Dockerfile
@@ -32,13 +32,17 @@ ARG ENABLE_LEADER_ELECTION_ARG="true"
 ARG DEVMODE_ARG="true"
 ARG REDIS_USERNAME_ARG="admin"
 ARG REDISAUTH_CLI_ARG="adminpass"
+ARG CLUSTER_VIEW_FILE_ARG="cluster_data"
+ARG CLUSTER_STATE_FILE_ARG="cluster_state"
 
 ENV NAMESPACE_ENV=${NAMESPACE_ARG}
 ENV METRICS_ADDR_ENV=${METRICS_ADDR_ARG}
 ENV ENABLE_LEADER_ELECTION_ENV=${ENABLE_LEADER_ELECTION_ARG}
 ENV DEVMODE_ENV=${DEVMODE_ARG}
 ENV REDIS_USERNAME=${REDIS_USERNAME_ARG}
 ENV REDISAUTH_CLI=${REDISAUTH_CLI_ARG}
+ENV CLUSTER_VIEW_FILE=${CLUSTER_STATCLUSTER_VIEW_FILE_ARGE_FILE_ARG}
+ENV CLUSTER_STATE_FILE=${CLUSTER_STATE_FILE_ARG}
 
 ENV CGO_ENABLED=0 GOOS=linux GOARCH=amd64 GO111MODULE=on
 

diff --git a/helm/templates/redisoperator/service.yaml b/helm/templates/redisoperator/service.yaml
@@ -5,8 +5,12 @@ metadata:
   namespace: {{ .Values.redisOperator.namespace }}
 spec:
   ports:
+  - port: 8080
+    targetPort: 8080
+    name: query
   - port: 9808
     targetPort: 9808
+    name: metrics
   selector:
     control-plane: controller-manager
-    redis-operator: redis-operator
+    redis-operator: redis-operator
diff --git a/helm/values.yaml b/helm/values.yaml
@@ -7,7 +7,7 @@ global:
 redisOperator:
   enabled: true
   namespace: default
-  managerReplicas: 2 # Number of manger pods the Deployment will create
+  managerReplicas: 1 # Number of manger pods the Deployment will create
   configFile: "configfiles/operator.conf"
   labels:
     control-plane: "controller-manager"
@@ -31,12 +31,17 @@ redisOperator:
         cpu: 100m
         memory: 256Mi
     ports:
-    - containerPort: 9808
+    - containerPort: 8080
+      name: query
     env:
     - name: REDIS_USERNAME
       value: "admin"
     - name: REDISCLI_AUTH
       value: "adminpass"
+    - name: CLUSTER_VIEW_FILE
+      value: "cluster_data"
+    - name: CLUSTER_STATE_FILE
+      value: "cluster_state"
     command:
     - "./manager"
     args:

diff --git a/main.go b/main.go
@@ -15,6 +15,7 @@ import (
 	dbv1 "github.com/PayU/redis-operator/api/v1"
 	"github.com/PayU/redis-operator/controllers"
 	"github.com/PayU/redis-operator/controllers/rediscli"
+	"github.com/PayU/redis-operator/server"
 	"github.com/go-logr/logr"
 	// +kubebuilder:scaffold:imports
 )
@@ -39,6 +40,12 @@ func getRedisCLI(log *logr.Logger) *rediscli.RedisCLI {
 }
 
 func main() {
+	go server.StartServer()
+
+	startManager()
+}
+
+func startManager() {
 	var metricsAddr, namespace, enableLeaderElection, devmode string
 
 	flag.StringVar(&metricsAddr, "metrics-addr", "0.0.0.0:9808", "The address the metric endpoint binds to.")