package kube import ( "path/filepath" "strings" "github.com/containers/podman/v3/libpod" "github.com/pkg/errors" v1 "k8s.io/api/core/v1" ) // KubeSeccompPaths holds information about a pod YAML's seccomp configuration // it holds both container and pod seccomp paths // nolint:golint type KubeSeccompPaths struct { containerPaths map[string]string podPath string } // FindForContainer checks whether a container has a seccomp path configured for it // if not, it returns the podPath, which should always have a value func (k *KubeSeccompPaths) FindForContainer(ctrName string) string { if path, ok := k.containerPaths[ctrName]; ok { return path } return k.podPath } // InitializeSeccompPaths takes annotations from the pod object metadata and finds annotations pertaining to seccomp // it parses both pod and container level // if the annotation is of the form "localhost/%s", the seccomp profile will be set to profileRoot/%s func InitializeSeccompPaths(annotations map[string]string, profileRoot string) (*KubeSeccompPaths, error) { seccompPaths := &KubeSeccompPaths{containerPaths: make(map[string]string)} var err error if annotations != nil { for annKeyValue, seccomp := range annotations { // check if it is prefaced with container.seccomp.security.alpha.kubernetes.io/ prefixAndCtr := strings.Split(annKeyValue, "/") if prefixAndCtr[0]+"/" != v1.SeccompContainerAnnotationKeyPrefix { continue } else if len(prefixAndCtr) != 2 { // this could be caused by a user inputting either of // container.seccomp.security.alpha.kubernetes.io{,/} // both of which are invalid return nil, errors.Errorf("Invalid seccomp path: %s", prefixAndCtr[0]) } path, err := verifySeccompPath(seccomp, profileRoot) if err != nil { return nil, err } seccompPaths.containerPaths[prefixAndCtr[1]] = path } podSeccomp, ok := annotations[v1.SeccompPodAnnotationKey] if ok { seccompPaths.podPath, err = verifySeccompPath(podSeccomp, profileRoot) } else { seccompPaths.podPath, err = libpod.DefaultSeccompPath() } if err != nil { return nil, err } } return seccompPaths, nil } // verifySeccompPath takes a path and checks whether it is a default, unconfined, or a path // the available options are parsed as defined in https://kubernetes.io/docs/concepts/policy/pod-security-policy/#seccomp func verifySeccompPath(path string, profileRoot string) (string, error) { switch path { case v1.DeprecatedSeccompProfileDockerDefault: fallthrough case v1.SeccompProfileRuntimeDefault: return libpod.DefaultSeccompPath() case "unconfined": return path, nil default: parts := strings.Split(path, "/") if parts[0] == "localhost" { return filepath.Join(profileRoot, parts[1]), nil } return "", errors.Errorf("invalid seccomp path: %s", path) } }