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Adding TLS mutual auth supoort to jti_openconfig_telemetry plugin #6027

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merged 2 commits into from
Jun 21, 2019
Merged

Adding TLS mutual auth supoort to jti_openconfig_telemetry plugin #6027

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b41f696
Adding TLS mutual auth supoort to jti_openconfig_telemetry plugin
littlespace Jun 21, 2019
1184ee9
Adding TLS mutual auth supoort to jti_openconfig_telemetry plugin
littlespace Jun 21, 2019
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10 changes: 7 additions & 3 deletions etc/telegraf.conf
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Original file line number Diff line number Diff line change
Expand Up @@ -4772,9 +4772,13 @@
# "/interfaces",
# ]
#
# ## x509 Certificate to use with TLS connection. If it is not provided, an insecure
# ## channel will be opened with server
# ssl_cert = "/etc/telegraf/cert.pem"
# ## enable client-side TLS and define CA to authenticate the device
# enable_tls = true
# tls_ca = "/etc/telegraf/ca.pem"
# insecure_skip_verify = true
# ## define client-side TLS certificate & key to authenticate to the device
# tls_cert = "/etc/telegraf/cert.pem"
# tls_key = "/etc/telegraf/key.pem"
#
# ## Delay between retry attempts of failed RPC calls or streams. Defaults to 1000ms.
# ## Failed streams/calls will not be retried if 0 is provided
Expand Down
10 changes: 7 additions & 3 deletions plugins/inputs/jti_openconfig_telemetry/README.md
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Original file line number Diff line number Diff line change
Expand Up @@ -41,9 +41,13 @@ This plugin reads Juniper Networks implementation of OpenConfig telemetry data f
"/interfaces",
]

## x509 Certificate to use with TLS connection. If it is not provided, an insecure
## channel will be opened with server
ssl_cert = "/etc/telegraf/cert.pem"
## enable client-side TLS and define CA to authenticate the device
# enable_tls = true
# tls_ca = "/etc/telegraf/ca.pem"
# insecure_skip_verify = true
## define client-side TLS certificate & key to authenticate to the device
# tls_cert = "/etc/telegraf/cert.pem"
# tls_key = "/etc/telegraf/key.pem"

## Delay between retry attempts of failed RPC calls or streams. Defaults to 1000ms.
## Failed streams/calls will not be retried if 0 is provided
Expand Down
45 changes: 27 additions & 18 deletions plugins/inputs/jti_openconfig_telemetry/openconfig_telemetry.go
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Original file line number Diff line number Diff line change
@@ -1,6 +1,7 @@
package jti_openconfig_telemetry

import (
"crypto/tls"
"fmt"
"log"
"net"
Expand All @@ -11,6 +12,7 @@ import (

"github.com/influxdata/telegraf"
"github.com/influxdata/telegraf/internal"
internaltls "github.com/influxdata/telegraf/internal/tls"
"github.com/influxdata/telegraf/plugins/inputs"
"github.com/influxdata/telegraf/plugins/inputs/jti_openconfig_telemetry/auth"
"github.com/influxdata/telegraf/plugins/inputs/jti_openconfig_telemetry/oc"
Expand All @@ -28,13 +30,17 @@ type OpenConfigTelemetry struct {
Password string
ClientID string `toml:"client_id"`
SampleFrequency internal.Duration `toml:"sample_frequency"`
SSLCert string `toml:"ssl_cert"`
StrAsTags bool `toml:"str_as_tags"`
RetryDelay internal.Duration `toml:"retry_delay"`

sensorsConfig []sensorConfig
sensorsConfig []sensorConfig

// GRPC settings
grpcClientConns []*grpc.ClientConn
wg *sync.WaitGroup
EnableTLS bool `toml:"enable_tls"`
internaltls.ClientConfig

wg *sync.WaitGroup
}

var (
Expand Down Expand Up @@ -74,10 +80,14 @@ var (
"/interfaces",
]

## x509 Certificate to use with TLS connection. If it is not provided, an insecure
## channel will be opened with server
ssl_cert = "/etc/telegraf/cert.pem"

## enable client-side TLS and define CA to authenticate the device
# enable_tls = true
# tls_ca = "/etc/telegraf/ca.pem"
# insecure_skip_verify = true
## define client-side TLS certificate & key to authenticate to the device
# tls_cert = "/etc/telegraf/cert.pem"
# tls_key = "/etc/telegraf/key.pem"

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## Delay between retry attempts of failed RPC calls or streams. Defaults to 1000ms.
## Failed streams/calls will not be retried if 0 is provided
retry_delay = "1000ms"
Expand Down Expand Up @@ -343,21 +353,20 @@ func (m *OpenConfigTelemetry) collectData(ctx context.Context,
}

func (m *OpenConfigTelemetry) Start(acc telegraf.Accumulator) error {

var tlscfg *tls.Config
var err error

// Build sensors config
if m.splitSensorConfig() == 0 {
return fmt.Errorf("E! No valid sensor configuration available")
}

// If SSL certificate is provided, use transport credentials
var err error
var transportCredentials credentials.TransportCredentials
if m.SSLCert != "" {
transportCredentials, err = credentials.NewClientTLSFromFile(m.SSLCert, "")
if err != nil {
return fmt.Errorf("E! Failed to read certificate: %v", err)
// Parse TLS config
if m.EnableTLS {
if tlscfg, err = m.ClientConfig.TLSConfig(); err != nil {
return err
}
} else {
transportCredentials = nil
}

// Connect to given list of servers and start collecting data
Expand All @@ -374,8 +383,8 @@ func (m *OpenConfigTelemetry) Start(acc telegraf.Accumulator) error {
}

// If a certificate is provided, open a secure channel. Else open insecure one
if transportCredentials != nil {
grpcClientConn, err = grpc.Dial(server, grpc.WithTransportCredentials(transportCredentials))
if tlscfg != nil {
grpcClientConn, err = grpc.Dial(server, grpc.WithTransportCredentials(credentials.NewTLS(tlscfg)))
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All the code is right, but if you are interested in going further I can see a way we could have done this nicer originally. We should have created a grpc.DialOption above based on EnableTLS, and then here we don't need the if/else. Optional.

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done

} else {
grpcClientConn, err = grpc.Dial(server, grpc.WithInsecure())
}
Expand Down