github/kubernetes
4
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Pod SecurityContext and PodSecurityPolicy supports slash as sysctl separator

Browse Source
This commit is contained in:
Mengjiao Liu
2021-12-06 16:53:27 +08:00
parent 3beb8dc596
commit 20bb84b3f1
6 changed files with 40 additions and 102 deletions
Download Patch File Download Diff File Expand all files Collapse all files

32
pkg/apis/core/validation/validation.go
View File

@@ -3398,8 +3398,6 @@ type PodValidationOptions struct {
AllowExpandedDNSConfig bool
// Allow OSField to be set in the pod spec
AllowOSField bool
// Allow sysctl name to contain a slash
AllowSysctlRegexContainSlash bool
}
// validatePodMetadataAndSpec tests if required fields in the pod.metadata and pod.spec are set,
@@ -4058,9 +4056,6 @@ const (
// a sysctl segment regex, concatenated with dots to form a sysctl name
SysctlSegmentFmt string = "[a-z0-9]([-_a-z0-9]*[a-z0-9])?"
// a sysctl name regex
SysctlFmt string = "(" + SysctlSegmentFmt + "\\.)*" + SysctlSegmentFmt
// a sysctl name regex with slash allowed
SysctlContainSlashFmt string = "(" + SysctlSegmentFmt + "[\\./])*" + SysctlSegmentFmt
@@ -4068,41 +4063,28 @@ const (
SysctlMaxLength int = 253
)
var sysctlRegexp = regexp.MustCompile("^" + SysctlFmt + "$")
var sysctlContainSlashRegexp = regexp.MustCompile("^" + SysctlContainSlashFmt + "$")
// IsValidSysctlName checks that the given string is a valid sysctl name,
// i.e. matches SysctlFmt (or SysctlContainSlashFmt if canContainSlash is true).
// i.e. matches SysctlContainSlashFmt.
// More info:
// https://man7.org/linux/man-pages/man8/sysctl.8.html
// https://man7.org/linux/man-pages/man5/sysctl.d.5.html
func IsValidSysctlName(name string, canContainSlash bool) bool {
func IsValidSysctlName(name string) bool {
if len(name) > SysctlMaxLength {
return false
}
if canContainSlash {
return sysctlContainSlashRegexp.MatchString(name)
}
return sysctlRegexp.MatchString(name)
return sysctlContainSlashRegexp.MatchString(name)
}
func getSysctlFmt(canContainSlash bool) string {
if canContainSlash {
// use relaxed validation everywhere in 1.24
return SysctlContainSlashFmt
}
// Will be removed in 1.24
return SysctlFmt
}
func validateSysctls(sysctls []core.Sysctl, fldPath *field.Path, allowSysctlRegexContainSlash bool) field.ErrorList {
func validateSysctls(sysctls []core.Sysctl, fldPath *field.Path) field.ErrorList {
allErrs := field.ErrorList{}
names := make(map[string]struct{})
for i, s := range sysctls {
if len(s.Name) == 0 {
allErrs = append(allErrs, field.Required(fldPath.Index(i).Child("name"), ""))
} else if !IsValidSysctlName(s.Name, allowSysctlRegexContainSlash) {
allErrs = append(allErrs, field.Invalid(fldPath.Index(i).Child("name"), s.Name, fmt.Sprintf("must have at most %d characters and match regex %s", SysctlMaxLength, getSysctlFmt(allowSysctlRegexContainSlash))))
} else if !IsValidSysctlName(s.Name) {
allErrs = append(allErrs, field.Invalid(fldPath.Index(i).Child("name"), s.Name, fmt.Sprintf("must have at most %d characters and match regex %s", SysctlMaxLength, sysctlContainSlashRegexp)))
} else if _, ok := names[s.Name]; ok {
allErrs = append(allErrs, field.Duplicate(fldPath.Index(i).Child("name"), s.Name))
}
@@ -4142,7 +4124,7 @@ func ValidatePodSecurityContext(securityContext *core.PodSecurityContext, spec *
}
if len(securityContext.Sysctls) != 0 {
allErrs = append(allErrs, validateSysctls(securityContext.Sysctls, fldPath.Child("sysctls"), opts.AllowSysctlRegexContainSlash)...)
allErrs = append(allErrs, validateSysctls(securityContext.Sysctls, fldPath.Child("sysctls"))...)
}
if securityContext.FSGroupChangePolicy != nil {