diff options
Diffstat (limited to '')
-rw-r--r-- | src/go/collectors/go.d.plugin/modules/supervisord/client.go | 109 |
1 files changed, 109 insertions, 0 deletions
diff --git a/src/go/collectors/go.d.plugin/modules/supervisord/client.go b/src/go/collectors/go.d.plugin/modules/supervisord/client.go new file mode 100644 index 000000000..da62ca21c --- /dev/null +++ b/src/go/collectors/go.d.plugin/modules/supervisord/client.go @@ -0,0 +1,109 @@ +// SPDX-License-Identifier: GPL-3.0-or-later + +package supervisord + +import ( + "context" + "errors" + "fmt" + "net" + "net/http" + "net/url" + "strings" + + "github.com/mattn/go-xmlrpc" +) + +type supervisorRPCClient struct { + client *xmlrpc.Client +} + +func newSupervisorRPCClient(serverURL *url.URL, httpClient *http.Client) (supervisorClient, error) { + switch serverURL.Scheme { + case "http", "https": + c := xmlrpc.NewClient(serverURL.String()) + c.HttpClient = httpClient + return &supervisorRPCClient{client: c}, nil + case "unix": + c := xmlrpc.NewClient("http://unix/RPC2") + t, ok := httpClient.Transport.(*http.Transport) + if !ok { + return nil, errors.New("unexpected HTTP client transport") + } + t.DialContext = func(ctx context.Context, _, _ string) (net.Conn, error) { + d := net.Dialer{Timeout: httpClient.Timeout} + return d.DialContext(ctx, "unix", serverURL.Path) + } + c.HttpClient = httpClient + return &supervisorRPCClient{client: c}, nil + default: + return nil, fmt.Errorf("unexpected URL scheme: %s", serverURL) + } +} + +// http://supervisord.org/api.html#process-control +type processStatus struct { + name string // name of the process. + group string // name of the process’ group. + start int // UNIX timestamp of when the process was started. + stop int // UNIX timestamp of when the process last ended, or 0 if the process has never been stopped. + now int // UNIX timestamp of the current time, which can be used to calculate process up-time. + state int // state code. + stateName string // string description of state. + exitStatus int // exit status (errorlevel) of process, or 0 if the process is still running. +} + +func (c *supervisorRPCClient) getAllProcessInfo() ([]processStatus, error) { + const fn = "supervisor.getAllProcessInfo" + resp, err := c.client.Call(fn) + if err != nil { + return nil, fmt.Errorf("error on '%s' function call: %v", fn, err) + } + return parseGetAllProcessInfo(resp) +} + +func (c *supervisorRPCClient) closeIdleConnections() { + c.client.HttpClient.CloseIdleConnections() +} + +func parseGetAllProcessInfo(resp interface{}) ([]processStatus, error) { + arr, ok := resp.(xmlrpc.Array) + if !ok { + return nil, fmt.Errorf("unexpected response type, want=xmlrpc.Array, got=%T", resp) + } + + var info []processStatus + + for _, item := range arr { + s, ok := item.(xmlrpc.Struct) + if !ok { + continue + } + + var p processStatus + for k, v := range s { + switch strings.ToLower(k) { + case "name": + p.name, _ = v.(string) + case "group": + p.group, _ = v.(string) + case "start": + p.start, _ = v.(int) + case "stop": + p.stop, _ = v.(int) + case "now": + p.now, _ = v.(int) + case "state": + p.state, _ = v.(int) + case "statename": + p.stateName, _ = v.(string) + case "exitstatus": + p.exitStatus, _ = v.(int) + } + } + if p.name != "" && p.group != "" && p.stateName != "" { + info = append(info, p) + } + } + return info, nil +} |