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authorToshiaki Takahashi <takahashi.tsc@ncos.nec.co.jp>2018-09-06 09:04:29 +0000
committerToshiaki Takahashi <takahashi.tsc@ncos.nec.co.jp>2018-09-07 06:03:01 +0000
commitd61931341176dad9ccff7c967a10d88fe54218fa (patch)
tree526457882d4abe0c38d2242d6daa311bf8ef51cf /src/dma/cmd/server
parent73abc060f31a6bf866fa1dad0a1a6efdfd94d775 (diff)
src: Add DMA localagent
Change-Id: Ibcee814fbc9a904448eeb368a1a26bbb69cf54aa Signed-off-by: Toshiaki Takahashi <takahashi.tsc@ncos.nec.co.jp>
Diffstat (limited to 'src/dma/cmd/server')
-rw-r--r--src/dma/cmd/server/agent.go31
-rw-r--r--src/dma/cmd/server/amqp.go108
-rw-r--r--src/dma/cmd/server/api.go85
-rw-r--r--src/dma/cmd/server/main.go85
4 files changed, 309 insertions, 0 deletions
diff --git a/src/dma/cmd/server/agent.go b/src/dma/cmd/server/agent.go
new file mode 100644
index 00000000..ffcb4a97
--- /dev/null
+++ b/src/dma/cmd/server/agent.go
@@ -0,0 +1,31 @@
+package main
+
+import (
+ "fmt"
+ "os/exec"
+ "strings"
+)
+
+func createCollectdConf() error {
+ outStatus, errStatus := exec.Command("ssh", "-o", "StrictHostKeyChecking=no", "-o", "UserKnownHostsFile=/dev/null", "localhost", "sudo", "systemctl", "status", "collectd").Output()
+ if errStatus != nil {
+ return fmt.Errorf("status NG")
+ }
+ if !strings.Contains(string(outStatus), "running") {
+ return fmt.Errorf("status not running")
+ }
+
+ _, errStop := exec.Command("ssh", "-o", "StrictHostKeyChecking=no", "-o", "UserKnownHostsFile=/dev/null", "localhost", "sudo", "systemctl", "stop", "collectd").Output()
+ if errStop != nil {
+ return fmt.Errorf("stop NG")
+ }
+
+ _, errStart := exec.Command("ssh", "-o", "StrictHostKeyChecking=no", "-o", "UserKnownHostsFile=/dev/null", "localhost", "sudo", "systemctl", "start", "collectd").Output()
+ if errStart != nil {
+ return fmt.Errorf("start NG")
+ }
+
+ fmt.Println("All complete!")
+
+ return nil
+}
diff --git a/src/dma/cmd/server/amqp.go b/src/dma/cmd/server/amqp.go
new file mode 100644
index 00000000..4d080fe1
--- /dev/null
+++ b/src/dma/cmd/server/amqp.go
@@ -0,0 +1,108 @@
+/*
+ * Copyright 2017 NEC Corporation
+ *
+ * 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.
+ */
+
+package main
+
+import (
+ "context"
+ "github.com/streadway/amqp"
+ "log"
+ "os"
+ "strings"
+)
+
+func failOnError(err error, msg string) {
+ if err != nil {
+ log.Fatalf("%s: %s", msg, err)
+ }
+}
+
+func runSubscriber(ctx context.Context, config *Config) {
+ confDirPath := config.Server.CollectdConfDir
+ amqpURL := "amqp://" + config.Server.AmqpUser + ":" + config.Server.AmqpPassword + "@" + config.Server.AmqpHost + ":" + config.Server.AmqpPort + "/"
+ conn, err := amqp.Dial(amqpURL)
+ failOnError(err, "Failed to connect to RabbitMQ")
+
+ defer conn.Close()
+
+ ch, err := conn.Channel()
+ failOnError(err, "Failed to open a channel")
+ defer ch.Close()
+
+ err = ch.ExchangeDeclare(
+ "collectd-conf", // name
+ "fanout", // type
+ false, // durable
+ false, // auto-deleted
+ false, // internal
+ false, // no-wait
+ nil, // arguments
+ )
+ failOnError(err, "Failed to declare an exchange")
+
+ q, err := ch.QueueDeclare(
+ "", // name
+ false, // durable
+ false, // delete when unused
+ true, // exclusive
+ false, // no-wait
+ nil, // arguments
+ )
+ failOnError(err, "Failed to declare a queue")
+
+ err = ch.QueueBind(
+ q.Name, // queue name
+ "", // routing key
+ "collectd-conf", // exchange
+ false,
+ nil)
+ failOnError(err, "Failed to bind a queue")
+
+ msgs, err := ch.Consume(
+ q.Name, // queue
+ "", // consumer
+ true, // auto-ack
+ false, // exclusive
+ false, // no-local
+ false, // no-wait
+ nil, // args
+ )
+ failOnError(err, "Failed to register a consumer")
+
+EVENTLOOP:
+ for {
+ select {
+ case <-ctx.Done():
+ break EVENTLOOP
+ case d, ok := <-msgs:
+ if ok {
+ dataText := strings.SplitN(string(d.Body), "/", 2)
+
+ dst, err := os.Create(confDirPath + "/" + dataText[0])
+ failOnError(err, "File create NG")
+ defer dst.Close()
+
+ dst.Write(([]byte)(dataText[1]))
+
+ err = createCollectdConf()
+ failOnError(err, "collectd conf NG")
+
+ log.Printf(" [x] %s", d.Body)
+ }
+ }
+ }
+
+}
diff --git a/src/dma/cmd/server/api.go b/src/dma/cmd/server/api.go
new file mode 100644
index 00000000..e8add0a1
--- /dev/null
+++ b/src/dma/cmd/server/api.go
@@ -0,0 +1,85 @@
+/*
+ * Copyright 2017 NEC Corporation
+ *
+ * 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.
+ */
+
+package main
+
+import (
+ "context"
+ "fmt"
+ "github.com/labstack/echo"
+ "io"
+ "net/http"
+ "os"
+ "time"
+)
+
+func runAPIServer(ctx context.Context, config *Config) {
+ confDirPath := config.Server.CollectdConfDir
+ e := echo.New()
+
+ e.GET("/", func(c echo.Context) error {
+ return c.String(http.StatusOK, "GET OK")
+ })
+ e.POST("/collectd/conf", func(c echo.Context) error {
+
+ file, err := c.FormFile("file")
+ if err != nil {
+ return c.String(http.StatusInternalServerError, "file send NG")
+ }
+
+ src, err := file.Open()
+ if err != nil {
+ return c.String(http.StatusInternalServerError, "file open NG")
+ }
+ defer src.Close()
+
+ dst, err := os.Create(confDirPath + "/" + file.Filename)
+ if err != nil {
+ return c.String(http.StatusInternalServerError, "file create NG")
+ }
+ defer dst.Close()
+
+ // Copy
+ if _, err = io.Copy(dst, src); err != nil {
+ return c.String(http.StatusInternalServerError, "file write NG")
+ }
+
+ err = createCollectdConf()
+ if err != nil {
+ errstr := fmt.Sprintf("collectd conf NG:%v", err)
+ return c.String(http.StatusInternalServerError, errstr)
+ }
+ return c.String(http.StatusCreated, "collectd conf OK")
+ })
+
+ // Start server
+ go func() {
+ urlStr := ":" + config.Server.ListenPort
+ if err := e.Start(urlStr); err != nil {
+ e.Logger.Info("shutting down the server")
+ }
+ }()
+
+ // Wait for context.Done() to gracefully shutdown the server with
+ // a timeout of 10 seconds.
+ <-ctx.Done()
+ ctxShutdown, cancel := context.WithTimeout(context.Background(), 10*time.Second)
+ defer cancel()
+ if err := e.Shutdown(ctxShutdown); err != nil {
+ e.Logger.Fatal(err)
+ }
+
+}
diff --git a/src/dma/cmd/server/main.go b/src/dma/cmd/server/main.go
new file mode 100644
index 00000000..2e028fa4
--- /dev/null
+++ b/src/dma/cmd/server/main.go
@@ -0,0 +1,85 @@
+/*
+ * Copyright 2017 NEC Corporation
+ *
+ * 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.
+ */
+
+package main
+
+import (
+ "context"
+ "flag"
+ "github.com/BurntSushi/toml"
+ "log"
+ "os"
+ "sync"
+)
+
+var serverTypeOpt = flag.String("type", "both", "server type: both(default), pubsub, rest")
+
+// Config is ...
+type Config struct {
+ Server ServerConfig
+}
+
+// ServerConfig is ...
+type ServerConfig struct {
+ ListenPort string `toml:"listen_port"`
+
+ AmqpHost string `toml:"amqp_host"`
+ AmqpUser string `toml:"amqp_user"`
+ AmqpPassword string `toml:"amqp_password"`
+ AmqpPort string `toml:"amqp_port"`
+
+ CollectdConfDir string `toml:"collectd_confdir"`
+}
+
+func main() {
+
+ var config Config
+ _, err := toml.DecodeFile("/etc/barometer-dma/config.toml", &config)
+ if err != nil {
+ log.Fatalf("Read error of config file")
+ }
+
+ if f, err := os.Stat(config.Server.CollectdConfDir); os.IsNotExist(err) || !f.IsDir() {
+ log.Fatalf("Path \"%s\" is not a directory", config.Server.CollectdConfDir)
+ }
+
+ var waitgroup sync.WaitGroup
+
+ flag.Parse()
+
+ if *serverTypeOpt == "both" || *serverTypeOpt == "pubsub" {
+ ctx := context.Background()
+ waitgroup.Add(1)
+ go func() {
+ defer waitgroup.Done()
+ runSubscriber(ctx, &config)
+ }()
+ log.Printf("Waiting for publish.")
+ }
+
+ if *serverTypeOpt == "both" || *serverTypeOpt == "rest" {
+ ctx := context.Background()
+ waitgroup.Add(1)
+ go func() {
+ defer waitgroup.Done()
+ runAPIServer(ctx, &config)
+ }()
+ log.Printf("Waiting for REST.")
+ }
+
+ waitgroup.Wait()
+ log.Printf("Server stop.")
+}