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Improve the error message for the service cidr check

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This commit is contained in:
Johannes M. Scheuermann 2020-04-23 07:55:57 +02:00
parent b19de7f9b6
commit 889648d6e5
2 changed files with 18 additions and 4 deletions
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10
cmd/kube-apiserver/app/options/validation.go
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@ -36,6 +36,8 @@ import (
// validateClusterIPFlags is expected to be called after Complete() // validateClusterIPFlags is expected to be called after Complete()
func validateClusterIPFlags(options *ServerRunOptions) []error { func validateClusterIPFlags(options *ServerRunOptions) []error {
var errs []error var errs []error
// maxCIDRbits is used to define the maximum CIDR size for the cluster ip(s)
const maxCIDRbits = 20
// validate that primary has been processed by user provided values or it has been defaulted // validate that primary has been processed by user provided values or it has been defaulted
if options.PrimaryServiceClusterIPRange.IP == nil { if options.PrimaryServiceClusterIPRange.IP == nil {
@ -50,8 +52,8 @@ func validateClusterIPFlags(options *ServerRunOptions) []error {
// Complete() expected to have set Primary* and Secondary* // Complete() expected to have set Primary* and Secondary*
// primary CIDR validation // primary CIDR validation
var ones, bits = options.PrimaryServiceClusterIPRange.Mask.Size() var ones, bits = options.PrimaryServiceClusterIPRange.Mask.Size()
if bits-ones > 20 { if bits-ones > maxCIDRbits {
errs = append(errs, errors.New("specified --service-cluster-ip-range is too large")) errs = append(errs, fmt.Errorf("specified --service-cluster-ip-range is too large. Network CIDR should not be bigger than /%d", bits-maxCIDRbits))
} }
// Secondary IP validation // Secondary IP validation
@ -79,8 +81,8 @@ func validateClusterIPFlags(options *ServerRunOptions) []error {
// bigger cidr (specially those offered by IPv6) will add no value // bigger cidr (specially those offered by IPv6) will add no value
// significantly increase snapshotting time. // significantly increase snapshotting time.
var ones, bits = options.SecondaryServiceClusterIPRange.Mask.Size() var ones, bits = options.SecondaryServiceClusterIPRange.Mask.Size()
if bits-ones > 20 { if bits-ones > maxCIDRbits {
errs = append(errs, errors.New("specified --secondary-service-cluster-ip-range is too large")) errs = append(errs, fmt.Errorf("specified --service-cluster-ip-range is too large. Network CIDR should not be bigger than /%d", bits-maxCIDRbits))
} }
} }

12
cmd/kube-apiserver/app/options/validation_test.go
View File

@ -95,6 +95,18 @@ func TestClusterSerivceIPRange(t *testing.T) {
options: makeOptionsWithCIDRs("10.0.0.0/16", "3000::/108"), options: makeOptionsWithCIDRs("10.0.0.0/16", "3000::/108"),
enableDualStack: false, enableDualStack: false,
}, },
{
name: "service cidr to big",
expectErrors: true,
options: makeOptionsWithCIDRs("10.0.0.0/8", ""),
enableDualStack: true,
},
{
name: "dual-stack secondary cidr to big",
expectErrors: true,
options: makeOptionsWithCIDRs("10.0.0.0/16", "3000::/64"),
enableDualStack: true,
},
/* success cases */ /* success cases */
{ {
name: "valid primary", name: "valid primary",