package mongodb import ( "crypto/tls" "crypto/x509" "fmt" "log" "net" "net/url" "strings" "sync" "time" "github.com/influxdata/telegraf" tlsint "github.com/influxdata/telegraf/internal/tls" "github.com/influxdata/telegraf/plugins/inputs" "gopkg.in/mgo.v2" ) type MongoDB struct { Servers []string Ssl Ssl mongos map[string]*Server GatherPerdbStats bool GatherColStats bool ColStatsDbs []string tlsint.ClientConfig } type Ssl struct { Enabled bool CaCerts []string `toml:"cacerts"` } var sampleConfig = ` ## An array of URLs of the form: ## "mongodb://" [user ":" pass "@"] host [ ":" port] ## For example: ## mongodb://user:auth_key@10.10.3.30:27017, ## mongodb://10.10.3.33:18832, servers = ["mongodb://127.0.0.1:27017"] ## When true, collect per database stats # gather_perdb_stats = false ## When true, collect per collection stats # gather_col_stats = false ## List of db where collections stats are collected ## If empty, all db are concerned # col_stats_dbs = ["local"] ## Optional TLS Config # tls_ca = "/etc/telegraf/ca.pem" # tls_cert = "/etc/telegraf/cert.pem" # tls_key = "/etc/telegraf/key.pem" ## Use TLS but skip chain & host verification # insecure_skip_verify = false ` func (m *MongoDB) SampleConfig() string { return sampleConfig } func (*MongoDB) Description() string { return "Read metrics from one or many MongoDB servers" } var localhost = &url.URL{Host: "mongodb://127.0.0.1:27017"} // Reads stats from all configured servers accumulates stats. // Returns one of the errors encountered while gather stats (if any). func (m *MongoDB) Gather(acc telegraf.Accumulator) error { if len(m.Servers) == 0 { m.gatherServer(m.getMongoServer(localhost), acc) return nil } var wg sync.WaitGroup for i, serv := range m.Servers { if !strings.HasPrefix(serv, "mongodb://") { // Preserve backwards compatibility for hostnames without a // scheme, broken in go 1.8. Remove in Telegraf 2.0 serv = "mongodb://" + serv log.Printf("W! [inputs.mongodb] Using %q as connection URL; please update your configuration to use an URL", serv) m.Servers[i] = serv } u, err := url.Parse(serv) if err != nil { acc.AddError(fmt.Errorf("Unable to parse address %q: %s", serv, err)) continue } if u.Host == "" { acc.AddError(fmt.Errorf("Unable to parse address %q", serv)) continue } wg.Add(1) go func(srv *Server) { defer wg.Done() acc.AddError(m.gatherServer(srv, acc)) }(m.getMongoServer(u)) } wg.Wait() return nil } func (m *MongoDB) getMongoServer(url *url.URL) *Server { if _, ok := m.mongos[url.Host]; !ok { m.mongos[url.Host] = &Server{ Url: url, } } return m.mongos[url.Host] } func (m *MongoDB) gatherServer(server *Server, acc telegraf.Accumulator) error { if server.Session == nil { var dialAddrs []string if server.Url.User != nil { dialAddrs = []string{server.Url.String()} } else { dialAddrs = []string{server.Url.Host} } dialInfo, err := mgo.ParseURL(dialAddrs[0]) if err != nil { return fmt.Errorf("Unable to parse URL (%s), %s\n", dialAddrs[0], err.Error()) } dialInfo.Direct = true dialInfo.Timeout = 5 * time.Second var tlsConfig *tls.Config if m.Ssl.Enabled { // Deprecated TLS config tlsConfig = &tls.Config{} if len(m.Ssl.CaCerts) > 0 { roots := x509.NewCertPool() for _, caCert := range m.Ssl.CaCerts { ok := roots.AppendCertsFromPEM([]byte(caCert)) if !ok { return fmt.Errorf("failed to parse root certificate") } } tlsConfig.RootCAs = roots } else { tlsConfig.InsecureSkipVerify = true } } else { tlsConfig, err = m.ClientConfig.TLSConfig() if err != nil { return err } } // If configured to use TLS, add a dial function if tlsConfig != nil { dialInfo.DialServer = func(addr *mgo.ServerAddr) (net.Conn, error) { conn, err := tls.Dial("tcp", addr.String(), tlsConfig) if err != nil { fmt.Printf("error in Dial, %s\n", err.Error()) } return conn, err } } sess, err := mgo.DialWithInfo(dialInfo) if err != nil { return fmt.Errorf("Unable to connect to MongoDB, %s\n", err.Error()) } server.Session = sess } return server.gatherData(acc, m.GatherPerdbStats, m.GatherColStats, m.ColStatsDbs) } func init() { inputs.Add("mongodb", func() telegraf.Input { return &MongoDB{ mongos: make(map[string]*Server), } }) }