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stability: add fault-trigger client (pingcap#326)
* stability: add fault-trigger client
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,194 @@ | ||
| package client | ||
|
|
||
| import ( | ||
| "encoding/json" | ||
| "fmt" | ||
| "io/ioutil" | ||
| "net/http" | ||
|
|
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| "github.com/pingcap/tidb-operator/tests/pkg/fault-trigger/api" | ||
| "github.com/pingcap/tidb-operator/tests/pkg/fault-trigger/manager" | ||
| "github.com/pingcap/tidb-operator/tests/pkg/util" | ||
| ) | ||
|
|
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| // Client is a fault-trigger client | ||
| type Client interface { | ||
| // ListVMs lists all virtual machines | ||
| ListVMs() ([]*manager.VM, error) | ||
| // StartVM start a specified virtual machine | ||
| StartVM(vm *manager.VM) error | ||
| // StopVM stops a specified virtual machine | ||
| StopVM(vm *manager.VM) error | ||
| // StartETCD starts the etcd service | ||
| StartETCD() error | ||
| // StopETCD stops the etcd service | ||
| StopETCD() error | ||
| // StartKubelet starts the kubelet service | ||
| StartKubelet() error | ||
| // StopKubelet stops the kubelet service | ||
| StopKubelet() error | ||
| } | ||
|
|
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| // client is used to communicate with the fault-trigger | ||
| type client struct { | ||
| cfg Config | ||
| httpCli *http.Client | ||
| } | ||
|
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| // Config defines for fault-trigger client | ||
| type Config struct { | ||
| Addr string | ||
| } | ||
|
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| // NewClient creates a new fault-trigger client from a given address | ||
| func NewClient(cfg Config) Client { | ||
| return &client{ | ||
| cfg: cfg, | ||
| httpCli: http.DefaultClient, | ||
| } | ||
| } | ||
|
|
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| type clientError struct { | ||
| code int | ||
| msg string | ||
| } | ||
|
|
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| func (e *clientError) Error() string { | ||
| return fmt.Sprintf("%s (code: %d)", e.msg, e.code) | ||
| } | ||
|
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| func (c client) do(req *http.Request) (*http.Response, []byte, error) { | ||
| resp, err := c.httpCli.Do(req) | ||
| if err != nil { | ||
| return nil, nil, err | ||
| } | ||
| defer resp.Body.Close() | ||
|
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| code := resp.StatusCode | ||
|
|
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| if code != http.StatusOK { | ||
| return resp, nil, &clientError{ | ||
| code: code, | ||
| msg: "fail to request to http service", | ||
| } | ||
| } | ||
|
|
||
| bodyByte, err := ioutil.ReadAll(resp.Body) | ||
| if err != nil { | ||
| return resp, nil, &clientError{ | ||
| code: code, | ||
| msg: fmt.Sprintf("failed to read data from resp body, error: %v", err), | ||
| } | ||
| } | ||
|
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| data, err := api.ExtractResponse(bodyByte) | ||
| if err != nil { | ||
| return resp, nil, &clientError{ | ||
| code: code, | ||
| msg: err.Error(), | ||
| } | ||
| } | ||
|
|
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| return resp, data, err | ||
| } | ||
|
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| func (c client) get(url string) ([]byte, error) { | ||
| req, err := http.NewRequest(http.MethodGet, url, nil) | ||
| if err != nil { | ||
| return nil, fmt.Errorf("error creating request: %v", err) | ||
| } | ||
|
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| _, body, err := c.do(req) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
|
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| return body, nil | ||
| } | ||
|
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| func (c *client) ListVMs() ([]*manager.VM, error) { | ||
| url := util.GenURL(fmt.Sprintf("%s%s/vms", c.cfg.Addr, api.APIPrefix)) | ||
| data, err := c.get(url) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
|
|
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| var vms []*manager.VM | ||
| if err = json.Unmarshal(data, &vms); err != nil { | ||
| return nil, err | ||
| } | ||
|
|
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| return vms, nil | ||
| } | ||
|
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| func (c *client) StartVM(vm *manager.VM) error { | ||
| if err := vm.Verify(); err != nil { | ||
| return err | ||
| } | ||
|
|
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| vmName := vm.Name | ||
| if len(vmName) == 0 { | ||
| vmName = vm.IP | ||
| } | ||
|
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| url := util.GenURL(fmt.Sprintf("%s/%s/vm/%s/start", c.cfg.Addr, api.APIPrefix, vmName)) | ||
| if _, err := c.get(url); err != nil { | ||
| return err | ||
| } | ||
|
|
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| return nil | ||
| } | ||
|
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| func (c *client) StopVM(vm *manager.VM) error { | ||
| if err := vm.Verify(); err != nil { | ||
| return err | ||
| } | ||
|
|
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| vmName := vm.Name | ||
| if len(vmName) == 0 { | ||
| vmName = vm.IP | ||
| } | ||
|
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| url := util.GenURL(fmt.Sprintf("%s/%s/vm/%s/stop", c.cfg.Addr, api.APIPrefix, vmName)) | ||
| if _, err := c.get(url); err != nil { | ||
| return err | ||
| } | ||
|
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| return nil | ||
| } | ||
|
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| func (c *client) StartETCD() error { | ||
| url := util.GenURL(fmt.Sprintf("%s/%s/etcd/start", c.cfg.Addr, api.APIPrefix)) | ||
| if _, err := c.get(url); err != nil { | ||
| return err | ||
| } | ||
|
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| return nil | ||
| } | ||
|
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| func (c *client) StopETCD() error { | ||
| url := util.GenURL(fmt.Sprintf("%s/%s/etcd/stop", c.cfg.Addr, api.APIPrefix)) | ||
| if _, err := c.get(url); err != nil { | ||
| return err | ||
| } | ||
|
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| return nil | ||
| } | ||
|
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| func (c *client) StartKubelet() error { | ||
| url := util.GenURL(fmt.Sprintf("%s/%s/kubelet/start", c.cfg.Addr, api.APIPrefix)) | ||
| if _, err := c.get(url); err != nil { | ||
| return err | ||
| } | ||
|
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| return nil | ||
| } | ||
|
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| func (c *client) StopKubelet() error { | ||
| url := util.GenURL(fmt.Sprintf("%s/%s/kubelet/stop", c.cfg.Addr, api.APIPrefix)) | ||
| if _, err := c.get(url); err != nil { | ||
| return err | ||
| } | ||
|
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| return nil | ||
| } |
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