Add aurora input plugin (#4158)
This commit is contained in:
Daniel Nelson
GitHub
parent
dbc9d03de1
commit
636a4aadf6
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@ -4,6 +4,7 @@ import (
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_ "github.com/influxdata/telegraf/plugins/inputs/aerospike"
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_ "github.com/influxdata/telegraf/plugins/inputs/amqp_consumer"
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_ "github.com/influxdata/telegraf/plugins/inputs/apache"
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_ "github.com/influxdata/telegraf/plugins/inputs/aurora"
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_ "github.com/influxdata/telegraf/plugins/inputs/bcache"
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_ "github.com/influxdata/telegraf/plugins/inputs/bond"
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_ "github.com/influxdata/telegraf/plugins/inputs/cassandra"
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File diff suppressed because one or more lines are too long
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@ -0,0 +1,280 @@
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package aurora
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import (
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"context"
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"encoding/json"
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"fmt"
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"net/http"
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"net/url"
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"strings"
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"sync"
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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/inputs"
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)
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type RoleType int
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const (
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Unknown RoleType = iota
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Leader
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Follower
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)
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func (r RoleType) String() string {
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switch r {
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case Leader:
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return "leader"
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case Follower:
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return "follower"
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default:
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return "unknown"
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}
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}
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var (
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defaultTimeout = 5 * time.Second
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defaultRoles = []string{"leader", "follower"}
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)
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type Vars map[string]interface{}
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type Aurora struct {
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Schedulers []string `toml:"schedulers"`
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Roles []string `toml:"roles"`
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Timeout internal.Duration `toml:"timeout"`
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Username string `toml:"username"`
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Password string `toml:"password"`
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tls.ClientConfig
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client *http.Client
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urls []*url.URL
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}
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var sampleConfig = `
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## Schedulers are the base addresses of your Aurora Schedulers
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schedulers = ["http://127.0.0.1:8081"]
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## Set of role types to collect metrics from.
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##
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## The scheduler roles are checked each interval by contacting the
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## scheduler nodes; zookeeper is not contacted.
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# roles = ["leader", "follower"]
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## Timeout is the max time for total network operations.
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# timeout = "5s"
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## Username and password are sent using HTTP Basic Auth.
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# username = "username"
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# password = "pa$$word"
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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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`
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func (a *Aurora) SampleConfig() string {
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return sampleConfig
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}
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func (a *Aurora) Description() string {
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return "Gather metrics from Apache Aurora schedulers"
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}
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func (a *Aurora) Gather(acc telegraf.Accumulator) error {
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if a.client == nil {
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err := a.initialize()
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if err != nil {
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return err
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}
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}
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ctx, cancel := context.WithTimeout(context.Background(), a.Timeout.Duration)
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defer cancel()
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var wg sync.WaitGroup
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for _, u := range a.urls {
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wg.Add(1)
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go func(u *url.URL) {
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defer wg.Done()
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role, err := a.gatherRole(ctx, u)
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if err != nil {
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acc.AddError(fmt.Errorf("%s: %v", u, err))
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return
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}
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if !a.roleEnabled(role) {
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return
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}
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err = a.gatherScheduler(ctx, u, role, acc)
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if err != nil {
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acc.AddError(fmt.Errorf("%s: %v", u, err))
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}
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}(u)
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}
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wg.Wait()
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return nil
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}
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func (a *Aurora) initialize() error {
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tlsCfg, err := a.ClientConfig.TLSConfig()
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if err != nil {
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return err
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}
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client := &http.Client{
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Transport: &http.Transport{
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Proxy: http.ProxyFromEnvironment,
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TLSClientConfig: tlsCfg,
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},
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}
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urls := make([]*url.URL, 0, len(a.Schedulers))
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for _, s := range a.Schedulers {
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loc, err := url.Parse(s)
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if err != nil {
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return err
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}
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urls = append(urls, loc)
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}
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if a.Timeout.Duration < time.Second {
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a.Timeout.Duration = defaultTimeout
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}
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if len(a.Roles) == 0 {
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a.Roles = defaultRoles
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}
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a.client = client
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a.urls = urls
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return nil
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}
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func (a *Aurora) roleEnabled(role RoleType) bool {
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if len(a.Roles) == 0 {
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return true
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}
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for _, v := range a.Roles {
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if role.String() == v {
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return true
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}
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}
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return false
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}
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func (a *Aurora) gatherRole(ctx context.Context, origin *url.URL) (RoleType, error) {
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loc := *origin
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loc.Path = "leaderhealth"
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req, err := http.NewRequest("GET", loc.String(), nil)
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if err != nil {
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return Unknown, err
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}
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if a.Username != "" || a.Password != "" {
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req.SetBasicAuth(a.Username, a.Password)
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}
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req.Header.Add("Accept", "text/plain")
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resp, err := a.client.Do(req.WithContext(ctx))
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if err != nil {
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return Unknown, err
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}
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resp.Body.Close()
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switch resp.StatusCode {
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case http.StatusOK:
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return Leader, nil
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case http.StatusBadGateway:
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fallthrough
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case http.StatusServiceUnavailable:
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return Follower, nil
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default:
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return Unknown, fmt.Errorf("%v", resp.Status)
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}
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}
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func (a *Aurora) gatherScheduler(
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ctx context.Context, origin *url.URL, role RoleType, acc telegraf.Accumulator,
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) error {
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loc := *origin
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loc.Path = "vars.json"
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req, err := http.NewRequest("GET", loc.String(), nil)
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if err != nil {
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return err
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}
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if a.Username != "" || a.Password != "" {
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req.SetBasicAuth(a.Username, a.Password)
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}
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req.Header.Add("Accept", "application/json")
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resp, err := a.client.Do(req.WithContext(ctx))
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if err != nil {
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return err
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}
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defer resp.Body.Close()
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if resp.StatusCode != http.StatusOK {
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return fmt.Errorf("%v", resp.Status)
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}
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var vars Vars
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decoder := json.NewDecoder(resp.Body)
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decoder.UseNumber()
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err = decoder.Decode(&vars)
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if err != nil {
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return fmt.Errorf("decoding response: %v", err)
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}
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var fields = make(map[string]interface{}, len(vars))
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for k, v := range vars {
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switch v := v.(type) {
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case json.Number:
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// Aurora encodes numbers as you would specify them as a literal,
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// use this to determine if a value is a float or int.
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if strings.ContainsAny(v.String(), ".eE") {
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fv, err := v.Float64()
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if err != nil {
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acc.AddError(err)
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continue
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}
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fields[k] = fv
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} else {
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fi, err := v.Int64()
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if err != nil {
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acc.AddError(err)
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continue
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}
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fields[k] = fi
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}
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default:
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continue
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}
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}
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acc.AddFields("aurora",
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fields,
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map[string]string{
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"scheduler": origin.String(),
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"role": role.String(),
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},
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)
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return nil
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}
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func init() {
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inputs.Add("aurora", func() telegraf.Input {
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return &Aurora{}
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})
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}
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@ -0,0 +1,259 @@
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package aurora
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import (
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"fmt"
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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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"github.com/influxdata/telegraf/testutil"
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"github.com/stretchr/testify/require"
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)
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type (
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TestHandlerFunc func(t *testing.T, w http.ResponseWriter, r *http.Request)
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CheckFunc func(t *testing.T, err error, acc *testutil.Accumulator)
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)
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func TestAurora(t *testing.T) {
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ts := httptest.NewServer(http.NotFoundHandler())
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defer ts.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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tests := []struct {
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name string
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plugin *Aurora
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schedulers []string
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roles []string
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leaderhealth TestHandlerFunc
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varsjson TestHandlerFunc
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check CheckFunc
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}{
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{
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name: "minimal",
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leaderhealth: func(t *testing.T, w http.ResponseWriter, r *http.Request) {
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w.WriteHeader(http.StatusOK)
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},
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varsjson: func(t *testing.T, w http.ResponseWriter, r *http.Request) {
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body := `{
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"variable_scrape_events": 2958,
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"variable_scrape_events_per_sec": 1.0,
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"variable_scrape_micros_per_event": 1484.0,
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"variable_scrape_micros_total": 4401084,
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"variable_scrape_micros_total_per_sec": 1485.0
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}`
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w.WriteHeader(http.StatusOK)
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w.Write([]byte(body))
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},
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check: func(t *testing.T, err error, acc *testutil.Accumulator) {
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require.NoError(t, err)
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require.Equal(t, 1, len(acc.Metrics))
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acc.AssertContainsTaggedFields(t,
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"aurora",
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map[string]interface{}{
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"variable_scrape_events": int64(2958),
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"variable_scrape_events_per_sec": 1.0,
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"variable_scrape_micros_per_event": 1484.0,
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"variable_scrape_micros_total": int64(4401084),
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"variable_scrape_micros_total_per_sec": 1485.0,
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},
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map[string]string{
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"scheduler": u.String(),
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"role": "leader",
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},
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)
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},
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},
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{
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name: "disabled role",
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roles: []string{"leader"},
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leaderhealth: func(t *testing.T, w http.ResponseWriter, r *http.Request) {
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w.WriteHeader(http.StatusServiceUnavailable)
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},
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check: func(t *testing.T, err error, acc *testutil.Accumulator) {
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require.NoError(t, err)
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require.NoError(t, acc.FirstError())
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require.Equal(t, 0, len(acc.Metrics))
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},
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},
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{
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name: "no metrics available",
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leaderhealth: func(t *testing.T, w http.ResponseWriter, r *http.Request) {
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w.WriteHeader(http.StatusOK)
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},
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varsjson: func(t *testing.T, w http.ResponseWriter, r *http.Request) {
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w.WriteHeader(http.StatusOK)
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w.Write([]byte("{}"))
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},
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check: func(t *testing.T, err error, acc *testutil.Accumulator) {
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require.NoError(t, err)
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require.NoError(t, acc.FirstError())
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require.Equal(t, 0, len(acc.Metrics))
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},
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},
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{
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name: "string metrics skipped",
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leaderhealth: func(t *testing.T, w http.ResponseWriter, r *http.Request) {
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w.WriteHeader(http.StatusOK)
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},
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varsjson: func(t *testing.T, w http.ResponseWriter, r *http.Request) {
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body := `{
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"foo": "bar"
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}`
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w.WriteHeader(http.StatusOK)
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w.Write([]byte(body))
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},
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check: func(t *testing.T, err error, acc *testutil.Accumulator) {
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require.NoError(t, err)
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require.NoError(t, acc.FirstError())
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require.Equal(t, 0, len(acc.Metrics))
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},
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},
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{
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name: "float64 unparseable",
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leaderhealth: func(t *testing.T, w http.ResponseWriter, r *http.Request) {
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w.WriteHeader(http.StatusOK)
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},
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varsjson: func(t *testing.T, w http.ResponseWriter, r *http.Request) {
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// too large
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body := `{
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"foo": 1e309
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}`
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w.WriteHeader(http.StatusOK)
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w.Write([]byte(body))
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},
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check: func(t *testing.T, err error, acc *testutil.Accumulator) {
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require.NoError(t, err)
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require.Error(t, acc.FirstError())
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require.Equal(t, 0, len(acc.Metrics))
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},
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},
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{
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name: "int64 unparseable",
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leaderhealth: func(t *testing.T, w http.ResponseWriter, r *http.Request) {
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w.WriteHeader(http.StatusOK)
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},
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varsjson: func(t *testing.T, w http.ResponseWriter, r *http.Request) {
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// too large
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body := `{
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"foo": 9223372036854775808
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}`
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w.WriteHeader(http.StatusOK)
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w.Write([]byte(body))
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},
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check: func(t *testing.T, err error, acc *testutil.Accumulator) {
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require.NoError(t, err)
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require.Error(t, acc.FirstError())
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require.Equal(t, 0, len(acc.Metrics))
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},
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},
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{
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name: "bad json",
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leaderhealth: func(t *testing.T, w http.ResponseWriter, r *http.Request) {
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w.WriteHeader(http.StatusOK)
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},
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varsjson: func(t *testing.T, w http.ResponseWriter, r *http.Request) {
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body := `{]`
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w.WriteHeader(http.StatusOK)
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w.Write([]byte(body))
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},
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check: func(t *testing.T, err error, acc *testutil.Accumulator) {
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require.NoError(t, err)
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require.Error(t, acc.FirstError())
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require.Equal(t, 0, len(acc.Metrics))
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},
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},
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{
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name: "wrong status code",
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leaderhealth: func(t *testing.T, w http.ResponseWriter, r *http.Request) {
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w.WriteHeader(http.StatusOK)
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},
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varsjson: func(t *testing.T, w http.ResponseWriter, r *http.Request) {
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body := `{
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"value": 42
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}`
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w.WriteHeader(http.StatusServiceUnavailable)
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w.Write([]byte(body))
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},
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check: func(t *testing.T, err error, acc *testutil.Accumulator) {
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require.NoError(t, err)
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require.Error(t, acc.FirstError())
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require.Equal(t, 0, len(acc.Metrics))
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},
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},
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}
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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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switch r.URL.Path {
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case "/leaderhealth":
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tt.leaderhealth(t, w, r)
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case "/vars.json":
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tt.varsjson(t, w, r)
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default:
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w.WriteHeader(http.StatusNotFound)
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}
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})
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var acc testutil.Accumulator
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plugin := &Aurora{}
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plugin.Schedulers = []string{u.String()}
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plugin.Roles = tt.roles
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err := plugin.Gather(&acc)
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tt.check(t, err, &acc)
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})
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}
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}
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func TestBasicAuth(t *testing.T) {
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ts := httptest.NewServer(http.NotFoundHandler())
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defer ts.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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tests := []struct {
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name string
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username string
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password string
|
||||
}{
|
||||
{
|
||||
name: "no auth",
|
||||
},
|
||||
{
|
||||
name: "basic auth",
|
||||
username: "username",
|
||||
password: "pa$$word",
|
||||
},
|
||||
{
|
||||
name: "username only",
|
||||
username: "username",
|
||||
},
|
||||
{
|
||||
name: "password only",
|
||||
password: "pa$$word",
|
||||
},
|
||||
}
|
||||
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)
|
||||
w.Write([]byte("{}"))
|
||||
})
|
||||
|
||||
var acc testutil.Accumulator
|
||||
plugin := &Aurora{}
|
||||
plugin.Schedulers = []string{u.String()}
|
||||
plugin.Username = tt.username
|
||||
plugin.Password = tt.password
|
||||
err := plugin.Gather(&acc)
|
||||
require.NoError(t, err)
|
||||
})
|
||||
}
|
||||
}
|
||||
|
|
@ -42,6 +42,13 @@ func (a *Accumulator) NMetrics() uint64 {
|
|||
return atomic.LoadUint64(&a.nMetrics)
|
||||
}
|
||||
|
||||
func (a *Accumulator) FirstError() error {
|
||||
if len(a.Errors) == 0 {
|
||||
return nil
|
||||
}
|
||||
return a.Errors[0]
|
||||
}
|
||||
|
||||
func (a *Accumulator) ClearMetrics() {
|
||||
a.Lock()
|
||||
defer a.Unlock()
|
||||
|
|
|
|||
Loading…
Reference in New Issue