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Thick plugin should not wait for API readiness on CNI DEL

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This modifies the behavior on CNI DEL for the thick plugin to just check once for API readiness, as opposed to waiting.
This commit is contained in:
dougbtv
2024-05-14 11:14:21 -04:00
parent 5a2597b329
commit 181f56f026
2 changed files with 18 additions and 6 deletions
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9
pkg/server/api/api.go
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@@ -104,3 +104,12 @@ func WaitUntilAPIReady(socketPath string) error {
return err == nil, nil
})
}
// CheckAPIReadyNow checks API readiness once
func CheckAPIReadyNow(socketPath string) error {
_, err := DoCNI(GetAPIEndpoint(MultusHealthAPIEndpoint), nil, SocketPath(socketPath))
if err != nil {
return fmt.Errorf("CheckAPIReadyNow: Daemon not reachable over socketfile: %v", err)
}
return nil
}

15
pkg/server/api/shim.go
View File

@@ -40,9 +40,12 @@ type ShimNetConf struct {
LogToStderr bool `json:"logToStderr,omitempty"`
}
// Define a type for API readiness check functions
type APIReadyCheckFunc func(string) error
// CmdAdd implements the CNI spec ADD command handler
func CmdAdd(args *skel.CmdArgs) error {
response, cniVersion, err := postRequest(args)
response, cniVersion, err := postRequest(args, WaitUntilAPIReady)
if err != nil {
return logging.Errorf("CmdAdd (shim): %v", err)
}
@@ -53,7 +56,7 @@ func CmdAdd(args *skel.CmdArgs) error {
// CmdCheck implements the CNI spec CHECK command handler
func CmdCheck(args *skel.CmdArgs) error {
_, _, err := postRequest(args)
_, _, err := postRequest(args, WaitUntilAPIReady)
if err != nil {
return logging.Errorf("CmdCheck (shim): %v", err)
}
@@ -63,7 +66,7 @@ func CmdCheck(args *skel.CmdArgs) error {
// CmdDel implements the CNI spec DEL command handler
func CmdDel(args *skel.CmdArgs) error {
_, _, err := postRequest(args)
_, _, err := postRequest(args, CheckAPIReadyNow)
if err != nil {
// No error in DEL (as of CNI spec)
logging.Errorf("CmdDel (shim): %v", err)
@@ -71,14 +74,14 @@ func CmdDel(args *skel.CmdArgs) error {
return nil
}
func postRequest(args *skel.CmdArgs) (*Response, string, error) {
func postRequest(args *skel.CmdArgs, readinessCheck APIReadyCheckFunc) (*Response, string, error) {
multusShimConfig, err := shimConfig(args.StdinData)
if err != nil {
return nil, "", fmt.Errorf("invalid CNI configuration passed to multus-shim: %w", err)
}
// check API readiness
if err := WaitUntilAPIReady(multusShimConfig.MultusSocketDir); err != nil {
// Execute the readiness check as necessary (e.g. don't wait on CNI DEL)
if err := readinessCheck(multusShimConfig.MultusSocketDir); err != nil {
return nil, multusShimConfig.CNIVersion, err
}