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Collect data from the Icinga 2 API (#109)
Collect data from Icinga 2 API
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@@ -4,6 +4,7 @@ run: | |
| linters: | ||
| enable-all: true | ||
| disable: | ||
| - goimports | ||
| - cyclop | ||
| - depguard | ||
| - exhaustivestruct | ||
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,128 @@ | ||
| package icinga2 | ||
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| import ( | ||
| "context" | ||
| "crypto/tls" | ||
| "fmt" | ||
| "github.com/NETWAYS/support-collector/internal/collection" | ||
| "io" | ||
| "net" | ||
| "net/http" | ||
| "path/filepath" | ||
| "strings" | ||
| "time" | ||
| ) | ||
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| type UserAuth struct { | ||
| Username string | ||
| Password string | ||
| } | ||
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| // APICred saves the user and password. Provided as arguments | ||
| var APICred UserAuth | ||
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| // APIEndpoints saves the FQDN or ip address for the endpoints, that will be collected. Provided as arguments. | ||
| var APIEndpoints []string | ||
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| // InitAPICollection starts to collect data from the Icinga 2 API for given endpoints | ||
| func InitAPICollection(c *collection.Collection) error { | ||
| // return if no endpoints are provided | ||
| if len(APIEndpoints) == 0 { | ||
| return fmt.Errorf("0 API endpoints provided. No data will be collected from remote targets") | ||
| } | ||
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| c.Log.Info("Start collection of Icinga 2 API endpoints") | ||
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| // return if username or password is not provided | ||
| if APICred.Username == "" || APICred.Password == "" { | ||
| return fmt.Errorf("API Endpoints provided but username and/or password are missing") | ||
| } | ||
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| for _, endpoint := range APIEndpoints { | ||
| // check if endpoint is reachable | ||
| err := endpointIsReachable(endpoint) | ||
| if err != nil { | ||
| c.Log.Warn(err) | ||
| continue | ||
| } | ||
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| c.Log.Debugf("Endpoint '%s' is reachable", endpoint) | ||
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| // collect /v1/status from endpoint | ||
| err = collectStatus(endpoint, c) | ||
| if err != nil { | ||
| c.Log.Warn(err) | ||
| } | ||
| } | ||
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| return nil | ||
| } | ||
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| // endpointIsReachable checks if the given endpoint is reachable within 5 sec | ||
| func endpointIsReachable(endpoint string) error { | ||
| timeout := 5 * time.Second | ||
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| // try to dial tcp connection within 5 seconds | ||
| conn, err := net.DialTimeout("tcp", endpoint, timeout) | ||
| if err != nil { | ||
| return fmt.Errorf("cant connect to endpoint '%s' within 5 seconds: %w", endpoint, err) | ||
| } | ||
| defer conn.Close() | ||
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| return nil | ||
| } | ||
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| // collectStatus requests $endpoint$/v1/status with APICred and saves the json result to file | ||
| func collectStatus(endpoint string, c *collection.Collection) error { | ||
| c.Log.Debugf("request data from endpoint '%s/v1/status'", endpoint) | ||
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| // allow insecure connections because of Icinga 2 certificates and add proxy if one is defined in the environments | ||
| tr := &http.Transport{ | ||
| TLSClientConfig: &tls.Config{InsecureSkipVerify: true}, //nolint:gosec | ||
| Proxy: http.ProxyFromEnvironment, | ||
| } | ||
| client := &http.Client{Transport: tr} | ||
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| // build context for request | ||
| ctx, cancel := context.WithTimeout(context.Background(), 10*time.Second) | ||
| defer cancel() | ||
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| // build request | ||
| req, err := http.NewRequestWithContext(ctx, http.MethodGet, fmt.Sprintf("https://%s/v1/status", endpoint), nil) | ||
| if err != nil { | ||
| return fmt.Errorf("cant build new request for '%s': %w", endpoint, err) | ||
| } | ||
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| // set authentication for request | ||
| req.SetBasicAuth(APICred.Username, APICred.Password) | ||
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| // make request | ||
| resp, err := client.Do(req) | ||
| if err != nil { | ||
| return fmt.Errorf("cant requests status from '%s': %w", endpoint, err) | ||
| } | ||
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| defer resp.Body.Close() | ||
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| body, err := io.ReadAll(resp.Body) | ||
| if err != nil { | ||
| return fmt.Errorf("cant read from response: %w", err) | ||
| } | ||
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| // if response code is not '200 OK' throw error and return | ||
| if resp.Status != "200 OK" { | ||
| return fmt.Errorf("request failed with status code %s: %s", resp.Status, string(body)) | ||
| } | ||
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| // add body to file | ||
| c.AddFileJSON(filepath.Join(ModuleName, fmt.Sprintf("api-v1_status_%s.json", extractHostname(endpoint))), string(body)) | ||
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| return nil | ||
| } | ||
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| // extractsHostname takes the endpoint and extract the hostname of it | ||
| func extractHostname(endpoint string) string { | ||
| splits := strings.Split(endpoint, ":") | ||
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| return splits[0] | ||
| } |
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