Initial release
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README.md
71
README.md
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# zabbix-go
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zabbix
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======
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This Go library implements the Zabbix 2.0 JRPC API
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This Go library implements the Zabbix 2.0 API. The Zabbix API is a JSONRPC
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based API, although it is not compatable with Go's builtin JSONRPC libraries.
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So we implement that JSONRPC, and provide data types that mimic Zabbbix's
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return values.
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Based on https://github.com/adubkov/zabbix
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Connecting to the API
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=====================
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```go
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func main() {
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api, err := zabbix.NewAPI("http://zabbix.yourhost.net/api_jsonrpc.php", "User", "Password")
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if err != nil {
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fmt.Println(err)
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return
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}
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versionresult, err := api.Version()
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if err != nil {
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fmt.Println(err)
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}
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fmt.Println(versionresult)
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_, err = api.Login()
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if err != nil {
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fmt.Println(err)
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return
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}
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fmt.Println("Connected to API")
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}
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```
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Making a call
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=============
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I typically wrap the actual API call to hide the messy details. If the
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response has an Error field, and the code is greater than 0, the API
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will return that Error. Then my wrapper function return a ZabbixError
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to the caller.
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```go
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// Find and return a single host object by name
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func GetHost(api *zabbix.API, host string) (zabbix.ZabbixHost, error) {
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params := make(map[string]interface{}, 0)
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filter := make(map[string]string, 0)
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filter["host"] = host
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params["filter"] = filter
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params["output"] = "extend"
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params["select_groups"] = "extend"
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params["templated_hosts"] = 1
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ret, err := api.Host("get", params)
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// This happens if there was an RPC error
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if err != nil {
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return nil, err
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}
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// If our call was successful
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if len(ret) > 0 {
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return ret[0], err
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}
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// This will be the case if the RPC call was successful, but
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// Zabbix had an issue with the data we passed.
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return nil, &zabbix.ZabbixError{0,"","Host not found"}
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}
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```
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287
zabbix.go
Normal file
287
zabbix.go
Normal file
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@ -0,0 +1,287 @@
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package zabbix
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import (
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"bytes"
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"crypto/tls"
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"encoding/json"
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"fmt"
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"io"
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"net"
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"net/http"
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"time"
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)
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/**
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Zabbix and Go's RPC implementations don't play with each other.. at all.
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So I've re-created the wheel at bit.
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*/
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type JsonRPCResponse struct {
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Jsonrpc string `json:"jsonrpc"`
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Error ZabbixError `json:"error"`
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Result interface{} `json:"result"`
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Id int `json:"id"`
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}
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type JsonRPCRequest struct {
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Jsonrpc string `json:"jsonrpc"`
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Method string `json:"method"`
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Params interface{} `json:"params"`
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// Zabbix 2.0:
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// The "user.login" method must be called without the "auth" parameter
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Auth string `json:"auth,omitempty"`
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Id int `json:"id"`
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}
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type ZabbixError struct {
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Code int `json:"code"`
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Message string `json:"message"`
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Data string `json:"data"`
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}
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func (z *ZabbixError) Error() string {
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return z.Data
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}
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type ZabbixHost map[string]interface{}
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type ZabbixGraph map[string]interface{}
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type ZabbixGraphItem map[string]interface{}
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type ZabbixHistoryItem struct {
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Clock string `json:"clock"`
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Value string `json:"value"`
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Itemid string `json:"itemid"`
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}
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type ZabbixTemplate map[string]interface{}
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type ZabbixHostGroup map[string]interface{}
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type API struct {
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url string
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user string
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passwd string
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id int
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auth string
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}
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func NewAPI(server, user, passwd string) (*API, error) {
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return &API{server, user, passwd, 0, ""}, nil
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}
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func (api *API) GetAuth() string {
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return api.auth
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}
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/**
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Each request establishes its own connection to the server. This makes it easy
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to keep request/responses in order without doing any concurrency
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*/
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func (api *API) ZabbixRequest(method string, data interface{}) (JsonRPCResponse, error) {
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// Setup our JSONRPC Request data
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id := api.id
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api.id = api.id + 1
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jsonobj := JsonRPCRequest{"2.0", method, data, api.auth, id}
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encoded, err := json.Marshal(jsonobj)
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if err != nil {
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return JsonRPCResponse{}, err
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}
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// Setup our HTTP request
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client := &http.Client{
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Transport: &http.Transport{
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MaxIdleConnsPerHost: 10,
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ResponseHeaderTimeout: 60 * time.Second,
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DialContext: (&net.Dialer{Timeout: time.Second}).DialContext,
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TLSClientConfig: &tls.Config{
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MaxVersion: tls.VersionTLS11,
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InsecureSkipVerify: true,
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},
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},
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}
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request, err := http.NewRequest("POST", api.url, bytes.NewBuffer(encoded))
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if err != nil {
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return JsonRPCResponse{}, err
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}
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request.Header.Add("Content-Type", "application/json-rpc")
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if api.auth != "" {
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// XXX Not required in practice, check spec
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//request.SetBasicAuth(api.user, api.passwd)
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//request.Header.Add("Authorization", api.auth)
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}
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// Execute the request
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response, err := client.Do(request)
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if err != nil {
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return JsonRPCResponse{}, err
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}
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/**
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We can't rely on response.ContentLength because it will
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be set at -1 for large responses that are chunked. So
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we treat each API response as streamed data.
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*/
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var result JsonRPCResponse
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var buf bytes.Buffer
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_, err = io.Copy(&buf, response.Body)
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if err != nil {
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return JsonRPCResponse{}, err
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}
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json.Unmarshal(buf.Bytes(), &result)
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response.Body.Close()
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return result, nil
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}
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func (api *API) Login() (bool, error) {
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params := make(map[string]string, 0)
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params["user"] = api.user
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params["password"] = api.passwd
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response, err := api.ZabbixRequest("user.login", params)
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if err != nil {
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fmt.Printf("Error: %s\n", err)
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return false, err
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}
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if response.Error.Code != 0 {
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return false, &response.Error
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}
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api.auth = response.Result.(string)
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return true, nil
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}
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func (api *API) Version() (string, error) {
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response, err := api.ZabbixRequest("APIInfo.version", make(map[string]string, 0))
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if err != nil {
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return "", err
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}
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if response.Error.Code != 0 {
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return "", &response.Error
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}
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return response.Result.(string), nil
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}
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/**
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Interface to the user.* calls
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*/
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func (api *API) User(method string, data interface{}) ([]interface{}, error) {
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response, err := api.ZabbixRequest("user."+method, data)
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if err != nil {
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return nil, err
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}
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if response.Error.Code != 0 {
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return nil, &response.Error
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}
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return response.Result.([]interface{}), nil
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}
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/**
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Interface to the host.* calls
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*/
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func (api *API) Host(method string, data interface{}) ([]ZabbixHost, error) {
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response, err := api.ZabbixRequest("host."+method, data)
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if err != nil {
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return nil, err
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}
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if response.Error.Code != 0 {
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return nil, &response.Error
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}
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// XXX uhg... there has got to be a better way to convert the response
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// to the type I want to return
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res, err := json.Marshal(response.Result)
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var ret []ZabbixHost
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err = json.Unmarshal(res, &ret)
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return ret, nil
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}
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/**
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Interface to the graph.* calls
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*/
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func (api *API) Graph(method string, data interface{}) ([]ZabbixGraph, error) {
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response, err := api.ZabbixRequest("graph."+method, data)
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if err != nil {
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return nil, err
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}
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if response.Error.Code != 0 {
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return nil, &response.Error
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}
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// XXX uhg... there has got to be a better way to convert the response
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// to the type I want to return
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res, err := json.Marshal(response.Result)
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var ret []ZabbixGraph
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err = json.Unmarshal(res, &ret)
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return ret, nil
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}
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/**
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Interface to the history.* calls
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*/
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func (api *API) History(method string, data interface{}) ([]ZabbixHistoryItem, error) {
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response, err := api.ZabbixRequest("history."+method, data)
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if err != nil {
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return nil, err
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}
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if response.Error.Code != 0 {
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return nil, &response.Error
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}
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// XXX uhg... there has got to be a better way to convert the response
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// to the type I want to return
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res, err := json.Marshal(response.Result)
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var ret []ZabbixHistoryItem
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err = json.Unmarshal(res, &ret)
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return ret, nil
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}
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/**
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Interface to the template.* calls
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*/
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func (api *API) Template(method string, data interface{}) ([]ZabbixTemplate, error) {
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response, err := api.ZabbixRequest("template."+method, data)
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if err != nil {
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return nil, err
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}
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if response.Error.Code != 0 {
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return nil, &response.Error
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}
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// XXX uhg... there has got to be a better way to convert the response
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// to the type I want to return
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res, err := json.Marshal(response.Result)
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var ret []ZabbixTemplate
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err = json.Unmarshal(res, &ret)
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return ret, nil
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}
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/**
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Interface to the hostgroup.* calls
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*/
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func (api *API) HostGroup(method string, data interface{}) ([]ZabbixHostGroup, error) {
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response, err := api.ZabbixRequest("hostgroup."+method, data)
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if err != nil {
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return nil, err
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}
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if response.Error.Code != 0 {
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return nil, &response.Error
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}
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res, err := json.Marshal(response.Result)
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var ret []ZabbixHostGroup
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err = json.Unmarshal(res, &ret)
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return ret, nil
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}
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