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// SPDX-License-Identifier: GPL-3.0-or-later
package client
import (
"encoding/json"
"fmt"
"io"
"net/http"
"sync"
"github.com/netdata/netdata/go/go.d.plugin/pkg/web"
)
// Session: https://vmware.github.io/vsphere-automation-sdk-rest/vsphere/index.html#SVC_com.vmware.cis.session
// Health: https://vmware.github.io/vsphere-automation-sdk-rest/vsphere/index.html#SVC_com.vmware.appliance.health
const (
pathCISSession = "/rest/com/vmware/cis/session"
pathHealthSystem = "/rest/appliance/health/system"
pathHealthSwap = "/rest/appliance/health/swap"
pathHealthStorage = "/rest/appliance/health/storage"
pathHealthSoftwarePackager = "/rest/appliance/health/software-packages"
pathHealthMem = "/rest/appliance/health/mem"
pathHealthLoad = "/rest/appliance/health/load"
pathHealthDatabaseStorage = "/rest/appliance/health/database-storage"
pathHealthApplMgmt = "/rest/appliance/health/applmgmt"
apiSessIDKey = "vmware-api-session-id"
)
type sessionToken struct {
m *sync.RWMutex
id string
}
func (s *sessionToken) set(id string) {
s.m.Lock()
defer s.m.Unlock()
s.id = id
}
func (s *sessionToken) get() string {
s.m.RLock()
defer s.m.RUnlock()
return s.id
}
func New(httpClient *http.Client, url, username, password string) *Client {
if httpClient == nil {
httpClient = &http.Client{}
}
return &Client{
httpClient: httpClient,
url: url,
username: username,
password: password,
token: &sessionToken{m: new(sync.RWMutex)},
}
}
type Client struct {
httpClient *http.Client
url string
username string
password string
token *sessionToken
}
// Login creates a session with the API. This operation exchanges user credentials supplied in the security context
// for a session identifier that is to be used for authenticating subsequent calls.
func (c *Client) Login() error {
req := web.Request{
URL: fmt.Sprintf("%s%s", c.url, pathCISSession),
Username: c.username,
Password: c.password,
Method: http.MethodPost,
}
s := struct{ Value string }{}
err := c.doOKWithDecode(req, &s)
if err == nil {
c.token.set(s.Value)
}
return err
}
// Logout terminates the validity of a session token.
func (c *Client) Logout() error {
req := web.Request{
URL: fmt.Sprintf("%s%s", c.url, pathCISSession),
Method: http.MethodDelete,
Headers: map[string]string{apiSessIDKey: c.token.get()},
}
resp, err := c.doOK(req)
closeBody(resp)
c.token.set("")
return err
}
// Ping sent a request to VCSA server to ensure the link is operating.
// In case of 401 error Ping tries to re authenticate.
func (c *Client) Ping() error {
req := web.Request{
URL: fmt.Sprintf("%s%s?~action=get", c.url, pathCISSession),
Method: http.MethodPost,
Headers: map[string]string{apiSessIDKey: c.token.get()},
}
resp, err := c.doOK(req)
defer closeBody(resp)
if resp != nil && resp.StatusCode == http.StatusUnauthorized {
return c.Login()
}
return err
}
func (c *Client) health(urlPath string) (string, error) {
req := web.Request{
URL: fmt.Sprintf("%s%s", c.url, urlPath),
Headers: map[string]string{apiSessIDKey: c.token.get()},
}
s := struct{ Value string }{}
err := c.doOKWithDecode(req, &s)
return s.Value, err
}
// ApplMgmt provides health status of applmgmt services.
func (c *Client) ApplMgmt() (string, error) {
return c.health(pathHealthApplMgmt)
}
// DatabaseStorage provides health status of database storage health.
func (c *Client) DatabaseStorage() (string, error) {
return c.health(pathHealthDatabaseStorage)
}
// Load provides health status of load health.
func (c *Client) Load() (string, error) {
return c.health(pathHealthLoad)
}
// Mem provides health status of memory health.
func (c *Client) Mem() (string, error) {
return c.health(pathHealthMem)
}
// SoftwarePackages provides information on available software updates available in remote VUM repository.
// Red indicates that security updates are available.
// Orange indicates that non-security updates are available.
// Green indicates that there are no updates available.
// Gray indicates that there was an error retrieving information on software updates.
func (c *Client) SoftwarePackages() (string, error) {
return c.health(pathHealthSoftwarePackager)
}
// Storage provides health status of storage health.
func (c *Client) Storage() (string, error) {
return c.health(pathHealthStorage)
}
// Swap provides health status of swap health.
func (c *Client) Swap() (string, error) {
return c.health(pathHealthSwap)
}
// System provides overall health of system.
func (c *Client) System() (string, error) {
return c.health(pathHealthSystem)
}
func (c *Client) do(req web.Request) (*http.Response, error) {
httpReq, err := web.NewHTTPRequest(req)
if err != nil {
return nil, fmt.Errorf("error on creating http request to %s : %v", req.URL, err)
}
return c.httpClient.Do(httpReq)
}
func (c *Client) doOK(req web.Request) (*http.Response, error) {
resp, err := c.do(req)
if err != nil {
return nil, err
}
if resp.StatusCode != http.StatusOK {
return resp, fmt.Errorf("%s returned %d", req.URL, resp.StatusCode)
}
return resp, nil
}
func (c *Client) doOKWithDecode(req web.Request, dst interface{}) error {
resp, err := c.doOK(req)
defer closeBody(resp)
if err != nil {
return err
}
err = json.NewDecoder(resp.Body).Decode(dst)
if err != nil {
return fmt.Errorf("error on decoding response from %s : %v", req.URL, err)
}
return nil
}
func closeBody(resp *http.Response) {
if resp != nil && resp.Body != nil {
_, _ = io.Copy(io.Discard, resp.Body)
_ = resp.Body.Close()
}
}
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