Add method, basic auth, and tls support to http output
This commit is contained in:
Daniel Nelson
parent
190a4128c5
commit
d5f57715dc
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@ -1,28 +1,41 @@
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# HTTP Output Plugin
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This plugin writes to a HTTP Server using the `POST Method`.
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Data collected from telegraf is sent in the Request Body.
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This plugin sends metrics in a HTTP message encoded using one of the output
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data formats. For data_formats that support batching, metrics are sent in batch format.
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### Configuration:
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```toml
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# Send telegraf metrics to HTTP Server(s)
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# A plugin that can transmit metrics over HTTP
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[[outputs.http]]
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## It requires a url name.
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## Will be transmitted telegraf metrics to the HTTP Server using the below URL.
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## Note that not support the HTTPS.
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## URL is the address to send metrics to
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url = "http://127.0.0.1:8080/metric"
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## Configure dial timeout in seconds. Default : 3
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timeout = 3
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## http_headers option can add a custom header to the request.
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## Content-Type is required http header in http plugin.
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## so content-type of HTTP specification (plain/text, application/json, etc...) must be filled out.
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[outputs.http.headers]
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Content-Type = "plain/text"
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## Timeout for HTTP message
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# timeout = "5s"
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## HTTP method, one of: "POST" or "PUT"
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# method = "POST"
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## HTTP Basic Auth credentials
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# username = "username"
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# password = "pa$$word"
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## Additional HTTP headers
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# [outputs.http.headers]
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# # Should be set manually to "application/json" for json data_format
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# Content-Type = "text/plain; charset=utf-8"
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## Optional TLS Config
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# tls_ca = "/etc/telegraf/ca.pem"
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# tls_cert = "/etc/telegraf/cert.pem"
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# tls_key = "/etc/telegraf/key.pem"
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## Use TLS but skip chain & host verification
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# insecure_skip_verify = false
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## Data format to output.
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## Each data format has it's own unique set of configuration options, read
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## more about them here:
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## https://github.com/influxdata/telegraf/blob/master/docs/DATA_FORMATS_OUTPUT.md
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data_format = "influx"
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# data_format = "influx"
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```
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@ -3,103 +3,119 @@ package http
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import (
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"bytes"
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"fmt"
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"github.com/influxdata/telegraf"
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"github.com/influxdata/telegraf/plugins/outputs"
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"github.com/influxdata/telegraf/plugins/serializers"
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"io/ioutil"
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"net/http"
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"strings"
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"time"
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"github.com/influxdata/telegraf"
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"github.com/influxdata/telegraf/internal"
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"github.com/influxdata/telegraf/internal/tls"
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"github.com/influxdata/telegraf/plugins/outputs"
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"github.com/influxdata/telegraf/plugins/serializers"
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)
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var sampleConfig = `
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## It requires a url name.
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## Will be transmitted telegraf metrics to the HTTP Server using the below URL.
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## Note that not support the HTTPS.
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## URL is the address to send metrics to
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url = "http://127.0.0.1:8080/metric"
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## Configure dial timeout in seconds. Default : 3
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timeout = 3
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## http_headers option can add a custom header to the request.
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## Content-Type is required http header in http plugin.
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## so content-type of HTTP specification (plain/text, application/json, etc...) must be filled out.
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[outputs.http.headers]
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Content-Type = "plain/text"
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## Timeout for HTTP message
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# timeout = "5s"
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## HTTP method, one of: "POST" or "PUT"
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# method = "POST"
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## HTTP Basic Auth credentials
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# username = "username"
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# password = "pa$$word"
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## Additional HTTP headers
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# [outputs.http.headers]
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# # Should be set to "application/json" for json data_format
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# Content-Type = "text/plain; charset=utf-8"
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## Optional TLS Config
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# tls_ca = "/etc/telegraf/ca.pem"
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# tls_cert = "/etc/telegraf/cert.pem"
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# tls_key = "/etc/telegraf/key.pem"
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## Use TLS but skip chain & host verification
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# insecure_skip_verify = false
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## Data format to output.
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## Each data format has it's own unique set of configuration options, read
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## more about them here:
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## https://github.com/influxdata/telegraf/blob/master/docs/DATA_FORMATS_OUTPUT.md
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data_format = "influx"
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# data_format = "influx"
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`
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const (
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POST = "POST"
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DEFAULT_TIME_OUT = 3
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CONTENT_TYPE = "content-type"
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defaultClientTimeout = 5 * time.Second
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defaultContentType = "text/plain; charset=utf-8"
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defaultMethod = http.MethodPost
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)
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type Http struct {
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// http required option
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type HTTP struct {
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URL string `toml:"url"`
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Headers map[string]string
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Timeout internal.Duration `toml:"timeout"`
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Method string `toml:"method"`
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Username string `toml:"username"`
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Password string `toml:"password"`
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Headers map[string]string `toml:"headers"`
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tls.ClientConfig
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// Option with http default value
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Timeout int `toml:"timeout"`
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client http.Client
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client *http.Client
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serializer serializers.Serializer
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}
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func (h *Http) SetSerializer(serializer serializers.Serializer) {
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func (h *HTTP) SetSerializer(serializer serializers.Serializer) {
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h.serializer = serializer
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}
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// Connect to the Output
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func (h *Http) Connect() error {
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h.client = http.Client{
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func (h *HTTP) Connect() error {
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if h.Method == "" {
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h.Method = http.MethodPost
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}
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h.Method = strings.ToUpper(h.Method)
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if h.Method != http.MethodPost && h.Method != http.MethodPut {
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return fmt.Errorf("invalid method [%s] %s", h.URL, h.Method)
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}
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if h.Timeout.Duration == 0 {
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h.Timeout.Duration = defaultClientTimeout
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}
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tlsCfg, err := h.ClientConfig.TLSConfig()
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if err != nil {
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return err
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}
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h.client = &http.Client{
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Transport: &http.Transport{
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TLSClientConfig: tlsCfg,
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Proxy: http.ProxyFromEnvironment,
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},
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Timeout: time.Duration(h.Timeout) * time.Second,
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}
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var isValid bool
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for k := range h.Headers {
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if strings.ToLower(k) == CONTENT_TYPE {
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isValid = true
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}
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}
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if !isValid {
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return fmt.Errorf("E! httpHeader require content-type!")
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Timeout: h.Timeout.Duration,
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}
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return nil
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}
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// Close is not implemented. Because http.Client not provided connection close policy. Instead, uses the response.Body.Close() pattern.
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func (h *Http) Close() error {
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func (h *HTTP) Close() error {
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return nil
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}
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// Description A plugin that can transmit metrics over HTTP
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func (h *Http) Description() string {
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func (h *HTTP) Description() string {
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return "A plugin that can transmit metrics over HTTP"
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}
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// SampleConfig provides sample example for developer
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func (h *Http) SampleConfig() string {
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func (h *HTTP) SampleConfig() string {
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return sampleConfig
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}
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// Writes metrics over HTTP POST
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func (h *Http) Write(metrics []telegraf.Metric) error {
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func (h *HTTP) Write(metrics []telegraf.Metric) error {
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reqBody, err := h.serializer.SerializeBatch(metrics)
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if err != nil {
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return fmt.Errorf("E! Error serializing some metrics: %s", err.Error())
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return err
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}
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if err := h.write(reqBody); err != nil {
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@ -109,9 +125,10 @@ func (h *Http) Write(metrics []telegraf.Metric) error {
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return nil
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}
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func (h *Http) write(reqBody []byte) error {
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req, err := http.NewRequest(POST, h.URL, bytes.NewBuffer(reqBody))
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func (h *HTTP) write(reqBody []byte) error {
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req, err := http.NewRequest(h.Method, h.URL, bytes.NewBuffer(reqBody))
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req.Header.Set("Content-Type", defaultContentType)
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for k, v := range h.Headers {
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req.Header.Set(k, v)
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}
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@ -123,20 +140,8 @@ func (h *Http) write(reqBody []byte) error {
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defer resp.Body.Close()
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_, err = ioutil.ReadAll(resp.Body)
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if err := h.isOk(resp, err); err != nil {
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return err
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}
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return nil
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}
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func (h *Http) isOk(resp *http.Response, err error) error {
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if resp == nil || err != nil {
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return fmt.Errorf("E! %s request failed! %s.", h.URL, err.Error())
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}
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if resp.StatusCode < 200 || resp.StatusCode > 209 {
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return fmt.Errorf("received bad status code, %d\n", resp.StatusCode)
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if resp.StatusCode < 200 || resp.StatusCode >= 300 {
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return fmt.Errorf("when writing to [%s] received status code: %d", h.URL, resp.StatusCode)
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}
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return nil
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@ -144,8 +149,9 @@ func (h *Http) isOk(resp *http.Response, err error) error {
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func init() {
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outputs.Add("http", func() telegraf.Output {
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return &Http{
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Timeout: DEFAULT_TIME_OUT,
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return &HTTP{
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Timeout: internal.Duration{Duration: defaultClientTimeout},
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Method: defaultMethod,
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}
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})
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}
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@ -2,243 +2,290 @@ package http
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import (
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"fmt"
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"github.com/influxdata/telegraf"
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"github.com/influxdata/telegraf/metric"
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"github.com/influxdata/telegraf/plugins/serializers/graphite"
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"github.com/influxdata/telegraf/plugins/serializers/json"
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"github.com/stretchr/testify/assert"
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"io/ioutil"
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"net/http"
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"net/http/httptest"
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"net/url"
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"testing"
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"time"
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"github.com/influxdata/telegraf"
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"github.com/influxdata/telegraf/metric"
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"github.com/influxdata/telegraf/plugins/serializers/influx"
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"github.com/stretchr/testify/require"
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)
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var (
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cpuTags = map[string]string{
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"host": "localhost",
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"cpu": "cpu0",
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"datacenter": "us-west-2",
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}
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cpuField = map[string]interface{}{
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"usage_idle": float64(91.5),
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}
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memTags = map[string]string{
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"host": "localhost",
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"cpu": "mem",
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"datacenter": "us-west-2",
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}
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memField = map[string]interface{}{
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"used": float64(91.5),
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}
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count int
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func getMetric() telegraf.Metric {
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m, err := metric.New(
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"cpu",
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map[string]string{},
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map[string]interface{}{
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"value": 42.0,
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},
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time.Unix(0, 0),
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)
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type TestOkHandler struct {
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T *testing.T
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Expected []string
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if err != nil {
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panic(err)
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}
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return m
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}
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// The handler gets a new variable each time it receives a request, so it fetches an expected string based on global variable.
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func (h TestOkHandler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
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actual, _ := ioutil.ReadAll(r.Body)
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assert.Equal(h.T, h.Expected[count], string(actual), fmt.Sprintf("%d Expected fail!", count))
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count++
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fmt.Fprint(w, "ok")
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func TestInvalidMethod(t *testing.T) {
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plugin := &HTTP{
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URL: "",
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Method: http.MethodGet,
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}
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type TestNotFoundHandler struct {
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err := plugin.Connect()
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require.Error(t, err)
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}
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func (h TestNotFoundHandler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
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http.NotFound(w, r)
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}
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func TestMethod(t *testing.T) {
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ts := httptest.NewServer(http.NotFoundHandler())
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defer ts.Close()
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func TestWriteAllInputMetric(t *testing.T) {
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now := time.Now()
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u, err := url.Parse(fmt.Sprintf("http://%s", ts.Listener.Addr().String()))
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require.NoError(t, err)
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server := httptest.NewServer(&TestOkHandler{
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T: t,
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Expected: []string{
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fmt.Sprintf("telegraf.cpu0.us-west-2.localhost.cpu.usage_idle 91.5 %d\ntelegraf.mem.us-west-2.localhost.mem.used 91.5 %d\n", now.Unix(), now.Unix()),
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tests := []struct {
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name string
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plugin *HTTP
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expectedMethod string
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connectError bool
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}{
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{
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name: "default method is POST",
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plugin: &HTTP{
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URL: u.String(),
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Method: defaultMethod,
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},
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})
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defer server.Close()
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defer resetCount()
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m1, _ := metric.New("cpu", cpuTags, cpuField, now)
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m2, _ := metric.New("mem", memTags, memField, now)
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metrics := []telegraf.Metric{m1, m2}
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http := &Http{
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URL: server.URL,
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Headers: map[string]string{
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"Content-Type": "plain/text",
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expectedMethod: http.MethodPost,
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},
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{
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name: "put is okay",
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plugin: &HTTP{
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URL: u.String(),
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Method: http.MethodPut,
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},
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expectedMethod: http.MethodPut,
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},
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{
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name: "get is invalid",
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plugin: &HTTP{
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URL: u.String(),
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Method: http.MethodGet,
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},
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connectError: true,
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},
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{
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name: "method is case insensitive",
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plugin: &HTTP{
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URL: u.String(),
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Method: "poST",
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},
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expectedMethod: http.MethodPost,
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},
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}
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http.SetSerializer(&graphite.GraphiteSerializer{
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Prefix: "telegraf",
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Template: "tags.measurement.field",
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for _, tt := range tests {
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t.Run(tt.name, func(t *testing.T) {
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ts.Config.Handler = http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
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require.Equal(t, tt.expectedMethod, r.Method)
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w.WriteHeader(http.StatusOK)
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})
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http.Connect()
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err := http.Write(metrics)
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serializer := influx.NewSerializer()
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tt.plugin.SetSerializer(serializer)
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err = tt.plugin.Connect()
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if tt.connectError {
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require.Error(t, err)
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return
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}
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require.NoError(t, err)
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assert.NoError(t, err)
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err = tt.plugin.Write([]telegraf.Metric{getMetric()})
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require.NoError(t, err)
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})
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}
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}
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func TestHttpWriteWithUnexpected404StatusCode(t *testing.T) {
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now := time.Now()
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func TestStatusCode(t *testing.T) {
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ts := httptest.NewServer(http.NotFoundHandler())
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defer ts.Close()
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server := httptest.NewServer(&TestNotFoundHandler{})
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defer server.Close()
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u, err := url.Parse(fmt.Sprintf("http://%s", ts.Listener.Addr().String()))
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require.NoError(t, err)
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m, _ := metric.New("cpu", cpuTags, cpuField, now)
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metrics := []telegraf.Metric{m}
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http := &Http{
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URL: server.URL,
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Headers: map[string]string{
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"Content-Type": "application/json",
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tests := []struct {
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name string
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plugin *HTTP
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statusCode int
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errFunc func(t *testing.T, err error)
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}{
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{
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name: "success",
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plugin: &HTTP{
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URL: u.String(),
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},
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statusCode: http.StatusOK,
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errFunc: func(t *testing.T, err error) {
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require.NoError(t, err)
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},
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},
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{
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name: "1xx status is an error",
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plugin: &HTTP{
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URL: u.String(),
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},
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statusCode: 103,
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errFunc: func(t *testing.T, err error) {
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require.Error(t, err)
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},
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},
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{
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name: "3xx status is an error",
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plugin: &HTTP{
|
||||
URL: u.String(),
|
||||
},
|
||||
statusCode: http.StatusMultipleChoices,
|
||||
errFunc: func(t *testing.T, err error) {
|
||||
require.Error(t, err)
|
||||
},
|
||||
},
|
||||
{
|
||||
name: "4xx status is an error",
|
||||
plugin: &HTTP{
|
||||
URL: u.String(),
|
||||
},
|
||||
statusCode: http.StatusMultipleChoices,
|
||||
errFunc: func(t *testing.T, err error) {
|
||||
require.Error(t, err)
|
||||
},
|
||||
},
|
||||
}
|
||||
|
||||
http.SetSerializer(&graphite.GraphiteSerializer{
|
||||
Prefix: "telegraf",
|
||||
Template: "tags.measurement.field",
|
||||
for _, tt := range tests {
|
||||
t.Run(tt.name, func(t *testing.T) {
|
||||
ts.Config.Handler = http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
|
||||
w.WriteHeader(tt.statusCode)
|
||||
})
|
||||
|
||||
http.Connect()
|
||||
err := http.Write(metrics)
|
||||
serializer := influx.NewSerializer()
|
||||
tt.plugin.SetSerializer(serializer)
|
||||
err = tt.plugin.Connect()
|
||||
require.NoError(t, err)
|
||||
|
||||
assert.Error(t, err)
|
||||
err = tt.plugin.Write([]telegraf.Metric{getMetric()})
|
||||
tt.errFunc(t, err)
|
||||
})
|
||||
}
|
||||
}
|
||||
|
||||
func TestHttpWriteWithExpected404StatusCode(t *testing.T) {
|
||||
now := time.Now()
|
||||
func TestContentType(t *testing.T) {
|
||||
ts := httptest.NewServer(http.NotFoundHandler())
|
||||
defer ts.Close()
|
||||
|
||||
server := httptest.NewServer(&TestNotFoundHandler{})
|
||||
defer server.Close()
|
||||
u, err := url.Parse(fmt.Sprintf("http://%s", ts.Listener.Addr().String()))
|
||||
require.NoError(t, err)
|
||||
|
||||
m, _ := metric.New("cpu", cpuTags, cpuField, now)
|
||||
metrics := []telegraf.Metric{m}
|
||||
|
||||
http := &Http{
|
||||
URL: server.URL,
|
||||
Headers: map[string]string{
|
||||
"Content-Type": "application/json",
|
||||
tests := []struct {
|
||||
name string
|
||||
plugin *HTTP
|
||||
expected string
|
||||
}{
|
||||
{
|
||||
name: "default is text plain",
|
||||
plugin: &HTTP{
|
||||
URL: u.String(),
|
||||
},
|
||||
expected: defaultContentType,
|
||||
},
|
||||
{
|
||||
name: "overwrite content_type",
|
||||
plugin: &HTTP{
|
||||
URL: u.String(),
|
||||
Headers: map[string]string{"Content-Type": "application/json"},
|
||||
},
|
||||
expected: "application/json",
|
||||
},
|
||||
}
|
||||
|
||||
http.SetSerializer(&graphite.GraphiteSerializer{
|
||||
Prefix: "telegraf",
|
||||
Template: "tags.measurement.field",
|
||||
for _, tt := range tests {
|
||||
t.Run(tt.name, func(t *testing.T) {
|
||||
ts.Config.Handler = http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
|
||||
require.Equal(t, tt.expected, r.Header.Get("Content-Type"))
|
||||
w.WriteHeader(http.StatusOK)
|
||||
})
|
||||
|
||||
http.Connect()
|
||||
err := http.Write(metrics)
|
||||
serializer := influx.NewSerializer()
|
||||
tt.plugin.SetSerializer(serializer)
|
||||
err = tt.plugin.Connect()
|
||||
require.NoError(t, err)
|
||||
|
||||
assert.Error(t, err)
|
||||
err = tt.plugin.Write([]telegraf.Metric{getMetric()})
|
||||
require.NoError(t, err)
|
||||
})
|
||||
}
|
||||
}
|
||||
|
||||
func TestHttpWriteWithIncorrectServerPort(t *testing.T) {
|
||||
now := time.Now()
|
||||
func TestBasicAuth(t *testing.T) {
|
||||
ts := httptest.NewServer(http.NotFoundHandler())
|
||||
defer ts.Close()
|
||||
|
||||
m, _ := metric.New("cpu", cpuTags, cpuField, now)
|
||||
metrics := []telegraf.Metric{m}
|
||||
u, err := url.Parse(fmt.Sprintf("http://%s", ts.Listener.Addr().String()))
|
||||
require.NoError(t, err)
|
||||
|
||||
http := &Http{
|
||||
URL: "http://127.0.0.1:56879/incorrect/url",
|
||||
Headers: map[string]string{
|
||||
"Content-Type": "application/json",
|
||||
tests := []struct {
|
||||
name string
|
||||
plugin *HTTP
|
||||
username string
|
||||
password string
|
||||
}{
|
||||
{
|
||||
name: "default",
|
||||
plugin: &HTTP{
|
||||
URL: u.String(),
|
||||
},
|
||||
},
|
||||
{
|
||||
name: "username only",
|
||||
plugin: &HTTP{
|
||||
URL: u.String(),
|
||||
Username: "username",
|
||||
},
|
||||
},
|
||||
{
|
||||
name: "password only",
|
||||
plugin: &HTTP{
|
||||
URL: u.String(),
|
||||
Password: "pa$$word",
|
||||
},
|
||||
},
|
||||
{
|
||||
name: "username and password",
|
||||
plugin: &HTTP{
|
||||
URL: u.String(),
|
||||
Username: "username",
|
||||
Password: "pa$$word",
|
||||
},
|
||||
},
|
||||
}
|
||||
|
||||
http.SetSerializer(&graphite.GraphiteSerializer{
|
||||
Prefix: "telegraf",
|
||||
Template: "tags.measurement.field",
|
||||
for _, tt := range tests {
|
||||
t.Run(tt.name, func(t *testing.T) {
|
||||
ts.Config.Handler = http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
|
||||
username, password, _ := r.BasicAuth()
|
||||
require.Equal(t, tt.username, username)
|
||||
require.Equal(t, tt.password, password)
|
||||
w.WriteHeader(http.StatusOK)
|
||||
})
|
||||
|
||||
http.Connect()
|
||||
err := http.Write(metrics)
|
||||
serializer := influx.NewSerializer()
|
||||
tt.plugin.SetSerializer(serializer)
|
||||
err = tt.plugin.Connect()
|
||||
require.NoError(t, err)
|
||||
|
||||
assert.Error(t, err)
|
||||
}
|
||||
|
||||
func TestHttpWriteWithHttpSerializer(t *testing.T) {
|
||||
now := time.Now()
|
||||
|
||||
server := httptest.NewServer(&TestOkHandler{
|
||||
T: t,
|
||||
Expected: []string{
|
||||
fmt.Sprintf("{\"metrics\":[{\"fields\":{\"usage_idle\":91.5},\"name\":\"cpu\",\"tags\":{\"cpu\":\"cpu0\",\"datacenter\":\"us-west-2\",\"host\":\"localhost\"},\"timestamp\":%d},{\"fields\":{\"usage_idle\":91.5},\"name\":\"cpu\",\"tags\":{\"cpu\":\"cpu0\",\"datacenter\":\"us-west-2\",\"host\":\"localhost\"},\"timestamp\":%d}]}", now.Unix(), now.Unix()),
|
||||
},
|
||||
err = tt.plugin.Write([]telegraf.Metric{getMetric()})
|
||||
require.NoError(t, err)
|
||||
})
|
||||
|
||||
defer server.Close()
|
||||
|
||||
http := &Http{
|
||||
URL: server.URL,
|
||||
Headers: map[string]string{
|
||||
"Content-Type": "application/json",
|
||||
},
|
||||
}
|
||||
jsonSerializer, _ := json.NewSerializer(time.Second)
|
||||
http.SetSerializer(jsonSerializer)
|
||||
|
||||
m1, _ := metric.New("cpu", cpuTags, cpuField, now)
|
||||
m2, _ := metric.New("cpu", cpuTags, cpuField, now)
|
||||
metrics := []telegraf.Metric{m1, m2}
|
||||
|
||||
http.Connect()
|
||||
err := http.Write(metrics)
|
||||
|
||||
assert.Nil(t, err)
|
||||
}
|
||||
|
||||
func TestHttpWithoutContentType(t *testing.T) {
|
||||
http := &Http{
|
||||
URL: "http://127.0.0.1:56879/correct/url",
|
||||
}
|
||||
|
||||
err := http.Connect()
|
||||
|
||||
assert.Error(t, err)
|
||||
}
|
||||
|
||||
func TestHttpWithContentType(t *testing.T) {
|
||||
http := &Http{
|
||||
URL: "http://127.0.0.1:56879/correct/url",
|
||||
Headers: map[string]string{
|
||||
"Content-Type": "application/json",
|
||||
},
|
||||
}
|
||||
|
||||
err := http.Connect()
|
||||
|
||||
assert.Nil(t, err)
|
||||
}
|
||||
|
||||
func TestImplementedInterfaceFunction(t *testing.T) {
|
||||
http := &Http{
|
||||
URL: "http://127.0.0.1:56879/incorrect/url",
|
||||
Headers: map[string]string{
|
||||
"Content-Type": "application/json",
|
||||
},
|
||||
}
|
||||
|
||||
assert.NotNil(t, http.SampleConfig())
|
||||
assert.NotNil(t, http.Description())
|
||||
}
|
||||
|
||||
func resetCount() {
|
||||
count = 0
|
||||
}
|
||||
|
|
|
|||
Loading…
Reference in New Issue