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nodeipam: return error instead of panics

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This commit is contained in:
Paco Xu
2023-03-02 22:00:47 +08:00
parent 4fdca4c5f6
commit 0e6636eb33
4 changed files with 47 additions and 63 deletions
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11
pkg/controller/nodeipam/legacyprovider.go
View File

@@ -20,6 +20,7 @@ limitations under the License.
package nodeipam
import (
"fmt"
"net"
coreinformers "k8s.io/client-go/informers/core/v1"
@@ -40,7 +41,7 @@ func createLegacyIPAM(
clusterCIDRs []*net.IPNet,
serviceCIDR *net.IPNet,
nodeCIDRMaskSizes []int,
) *ipam.Controller {
) (*ipam.Controller, error) {
cfg := &ipam.Config{
Resync: ipamResyncInterval,
MaxBackoff: ipamMaxBackoff,
@@ -63,12 +64,10 @@ func createLegacyIPAM(
}
ipamc, err := ipam.NewController(cfg, kubeClient, cloud, cidr, serviceCIDR, nodeCIDRMaskSizes[0])
if err != nil {
logger.Error(err, "Error creating ipam controller")
klog.FlushAndExit(klog.ExitFlushTimeout, 1)
return nil, fmt.Errorf("error creating ipam controller: %w", err)
}
if err := ipamc.Start(logger, nodeInformer); err != nil {
logger.Error(err, "Error trying to Init()")
klog.FlushAndExit(klog.ExitFlushTimeout, 1)
return nil, fmt.Errorf("error trying to Init(): %w", err)
}
return ipamc
return ipamc, nil
}

16
pkg/controller/nodeipam/node_ipam_controller.go
View File

@@ -18,6 +18,7 @@ package nodeipam
import (
"context"
"fmt"
"net"
"time"
@@ -93,22 +94,19 @@ func NewNodeIpamController(
logger := klog.FromContext(ctx)
if kubeClient == nil {
logger.Error(nil, "kubeClient is nil when starting Controller")
klog.FlushAndExit(klog.ExitFlushTimeout, 1)
return nil, fmt.Errorf("kubeClient is nil when starting Controller")
}
// Cloud CIDR allocator does not rely on clusterCIDR or nodeCIDRMaskSize for allocation.
if allocatorType != ipam.CloudAllocatorType {
if len(clusterCIDRs) == 0 {
logger.Error(nil, "Controller: Must specify --cluster-cidr if --allocate-node-cidrs is set")
klog.FlushAndExit(klog.ExitFlushTimeout, 1)
return nil, fmt.Errorf("Controller: Must specify --cluster-cidr if --allocate-node-cidrs is set")
}
for idx, cidr := range clusterCIDRs {
mask := cidr.Mask
if maskSize, _ := mask.Size(); maskSize > nodeCIDRMaskSizes[idx] {
logger.Error(nil, "Controller: Invalid --cluster-cidr, mask size of cluster CIDR must be less than or equal to --node-cidr-mask-size configured for CIDR family")
klog.FlushAndExit(klog.ExitFlushTimeout, 1)
return nil, fmt.Errorf("Controller: Invalid --cluster-cidr, mask size of cluster CIDR must be less than or equal to --node-cidr-mask-size configured for CIDR family")
}
}
}
@@ -126,7 +124,11 @@ func NewNodeIpamController(
// TODO: Abstract this check into a generic controller manager should run method.
if ic.allocatorType == ipam.IPAMFromClusterAllocatorType || ic.allocatorType == ipam.IPAMFromCloudAllocatorType {
ic.legacyIPAM = createLegacyIPAM(logger, ic, nodeInformer, cloud, kubeClient, clusterCIDRs, serviceCIDR, nodeCIDRMaskSizes)
var err error
ic.legacyIPAM, err = createLegacyIPAM(logger, ic, nodeInformer, cloud, kubeClient, clusterCIDRs, serviceCIDR, nodeCIDRMaskSizes)
if err != nil {
return nil, err
}
} else {
var err error

76
pkg/controller/nodeipam/node_ipam_controller_test.go
View File

@@ -21,6 +21,7 @@ package nodeipam
import (
"context"
"errors"
"net"
"strings"
"testing"
@@ -31,7 +32,7 @@ import (
"k8s.io/client-go/informers"
"k8s.io/client-go/kubernetes/fake"
featuregatetesting "k8s.io/component-base/featuregate/testing"
"k8s.io/klog/v2"
"k8s.io/klog/v2/ktesting"
"k8s.io/kubernetes/pkg/controller/nodeipam/ipam"
"k8s.io/kubernetes/pkg/controller/testutil"
"k8s.io/kubernetes/pkg/features"
@@ -75,24 +76,24 @@ func TestNewNodeIpamControllerWithCIDRMasks(t *testing.T) {
secondaryServiceCIDR string
maskSize []int
allocatorType ipam.CIDRAllocatorType
wantFatal bool
expectedError error
}{
{"valid_range_allocator", "10.0.0.0/21", "10.1.0.0/21", emptyServiceCIDR, []int{24}, ipam.RangeAllocatorType, false},
{"valid_range_allocator_dualstack", "10.0.0.0/21,2000::/48", "10.1.0.0/21", emptyServiceCIDR, []int{24, 64}, ipam.RangeAllocatorType, false},
{"valid_range_allocator_dualstack_dualstackservice", "10.0.0.0/21,2000::/48", "10.1.0.0/21", "3000::/112", []int{24, 64}, ipam.RangeAllocatorType, false},
{"valid_cloud_allocator", "10.0.0.0/21", "10.1.0.0/21", emptyServiceCIDR, []int{24}, ipam.CloudAllocatorType, false},
{"valid_ipam_from_cluster", "10.0.0.0/21", "10.1.0.0/21", emptyServiceCIDR, []int{24}, ipam.IPAMFromClusterAllocatorType, false},
{"valid_ipam_from_cloud", "10.0.0.0/21", "10.1.0.0/21", emptyServiceCIDR, []int{24}, ipam.IPAMFromCloudAllocatorType, false},
{"valid_skip_cluster_CIDR_validation_for_cloud_allocator", "invalid", "10.1.0.0/21", emptyServiceCIDR, []int{24}, ipam.CloudAllocatorType, false},
{"valid_CIDR_larger_than_mask_cloud_allocator", "10.0.0.0/16", "10.1.0.0/21", emptyServiceCIDR, []int{24}, ipam.CloudAllocatorType, false},
{"invalid_cluster_CIDR", "", "10.1.0.0/21", emptyServiceCIDR, []int{24}, ipam.IPAMFromClusterAllocatorType, true},
{"invalid_CIDR_smaller_than_mask_other_allocators", "10.0.0.0/26", "10.1.0.0/21", emptyServiceCIDR, []int{24}, ipam.IPAMFromCloudAllocatorType, true},
{"invalid_serviceCIDR_contains_clusterCIDR", "10.0.0.0/16", "10.0.0.0/8", emptyServiceCIDR, []int{24}, ipam.IPAMFromClusterAllocatorType, true},
{"invalid_CIDR_mask_size", "10.0.0.0/24,2000::/64", "10.1.0.0/21", emptyServiceCIDR, []int{24, 48}, ipam.IPAMFromClusterAllocatorType, true},
{"valid_range_allocator", "10.0.0.0/21", "10.1.0.0/21", emptyServiceCIDR, []int{24}, ipam.RangeAllocatorType, nil},
{"valid_range_allocator_dualstack", "10.0.0.0/21,2000::/48", "10.1.0.0/21", emptyServiceCIDR, []int{24, 64}, ipam.RangeAllocatorType, nil},
{"valid_range_allocator_dualstack_dualstackservice", "10.0.0.0/21,2000::/48", "10.1.0.0/21", "3000::/112", []int{24, 64}, ipam.RangeAllocatorType, nil},
{"valid_cloud_allocator", "10.0.0.0/21", "10.1.0.0/21", emptyServiceCIDR, []int{24}, ipam.CloudAllocatorType, nil},
{"valid_ipam_from_cluster", "10.0.0.0/21", "10.1.0.0/21", emptyServiceCIDR, []int{24}, ipam.IPAMFromClusterAllocatorType, nil},
{"valid_ipam_from_cloud", "10.0.0.0/21", "10.1.0.0/21", emptyServiceCIDR, []int{24}, ipam.IPAMFromCloudAllocatorType, nil},
{"valid_skip_cluster_CIDR_validation_for_cloud_allocator", "invalid", "10.1.0.0/21", emptyServiceCIDR, []int{24}, ipam.CloudAllocatorType, nil},
{"valid_CIDR_larger_than_mask_cloud_allocator", "10.0.0.0/16", "10.1.0.0/21", emptyServiceCIDR, []int{24}, ipam.CloudAllocatorType, nil},
{"invalid_cluster_CIDR", "", "10.1.0.0/21", emptyServiceCIDR, []int{24}, ipam.IPAMFromClusterAllocatorType, errors.New("Controller: Must specify --cluster-cidr if --allocate-node-cidrs is set")},
{"invalid_CIDR_smaller_than_mask_other_allocators", "10.0.0.0/26", "10.1.0.0/21", emptyServiceCIDR, []int{24}, ipam.IPAMFromCloudAllocatorType, errors.New("Controller: Invalid --cluster-cidr, mask size of cluster CIDR must be less than or equal to --node-cidr-mask-size configured for CIDR family")},
{"invalid_serviceCIDR_contains_clusterCIDR", "10.0.0.0/16", "10.0.0.0/8", emptyServiceCIDR, []int{24}, ipam.IPAMFromClusterAllocatorType, errors.New("error creating ipam controller: failed after occupy serviceCIDR: CIDR allocation failed; there are no remaining CIDRs left to allocate in the accepted range")},
{"invalid_CIDR_mask_size", "10.0.0.0/24,2000::/64", "10.1.0.0/21", emptyServiceCIDR, []int{24, 48}, ipam.IPAMFromClusterAllocatorType, errors.New("Controller: Invalid --cluster-cidr, mask size of cluster CIDR must be less than or equal to --node-cidr-mask-size configured for CIDR family")},
} {
test := tc
_, ctx := ktesting.NewTestContext(t)
t.Run(test.desc, func(t *testing.T) {
klog.Warningf("Test case start: %s", test.desc)
t.Parallel()
clusterCidrs, err := netutils.ParseCIDRs(strings.Split(test.clusterCIDR, ","))
if err != nil {
@@ -106,20 +107,15 @@ func TestNewNodeIpamControllerWithCIDRMasks(t *testing.T) {
if err != nil {
secondaryServiceCIDRIpNet = nil
}
// This is the subprocess which runs the actual code.
defer func() {
r := recover()
if r == nil && test.wantFatal {
t.Errorf("Test %s, the code did not panic", test.desc)
} else if r != nil && !test.wantFatal {
t.Errorf("Test %s, the code did panic", test.desc)
_, err = newTestNodeIpamController(ctx, clusterCidrs, serviceCIDRIpNet, secondaryServiceCIDRIpNet, test.maskSize, test.allocatorType)
if test.expectedError == nil {
if err != nil {
t.Errorf("Test %s, unexpected error: %v", test.desc, err)
}
} else {
if err.Error() != test.expectedError.Error() {
t.Errorf("Test %s, got error: %v, expected error: %v", test.desc, err, test.expectedError)
}
}()
_, err = newTestNodeIpamController(clusterCidrs, serviceCIDRIpNet, secondaryServiceCIDRIpNet, test.maskSize, test.allocatorType)
// The code is inconsistent about returning error or panic
// but we have to keep both ways of existing for backwards compatibility
if (err != nil) != test.wantFatal {
t.Errorf("Test %s,Got error %v expected %v", test.desc, err, test.wantFatal)
}
})
}
@@ -135,14 +131,13 @@ func TestNewNodeIpamControllerWithCIDRMasks2(t *testing.T) {
secondaryServiceCIDR string
maskSize []int
allocatorType ipam.CIDRAllocatorType
wantFatal bool
}{
{"valid_multi_cidr_range_allocator", "10.0.0.0/21", "10.1.0.0/21", emptyServiceCIDR, []int{24}, ipam.MultiCIDRRangeAllocatorType, false},
{"valid_multi_cidr_range_allocator_dualstack", "10.0.0.0/21,2000::/48", "10.1.0.0/21", emptyServiceCIDR, []int{24, 64}, ipam.MultiCIDRRangeAllocatorType, false},
{"valid_multi_cidr_range_allocator", "10.0.0.0/21", "10.1.0.0/21", emptyServiceCIDR, []int{24}, ipam.MultiCIDRRangeAllocatorType},
{"valid_multi_cidr_range_allocator_dualstack", "10.0.0.0/21,2000::/48", "10.1.0.0/21", emptyServiceCIDR, []int{24, 64}, ipam.MultiCIDRRangeAllocatorType},
} {
test := tc
_, ctx := ktesting.NewTestContext(t)
t.Run(test.desc, func(t *testing.T) {
klog.Warningf("Test case start: %s", test.desc)
defer featuregatetesting.SetFeatureGateDuringTest(t, utilfeature.DefaultFeatureGate, features.MultiCIDRRangeAllocator, true)()
clusterCidrs, err := netutils.ParseCIDRs(strings.Split(test.clusterCIDR, ","))
@@ -157,20 +152,9 @@ func TestNewNodeIpamControllerWithCIDRMasks2(t *testing.T) {
if err != nil {
secondaryServiceCIDRIpNet = nil
}
// This is the subprocess which runs the actual code.
defer func() {
r := recover()
if r == nil && test.wantFatal {
t.Errorf("Test %s, the code did not panic", test.desc)
} else if r != nil && !test.wantFatal {
t.Errorf("Test %s, the code did panic", test.desc)
}
}()
_, err = newTestNodeIpamController(clusterCidrs, serviceCIDRIpNet, secondaryServiceCIDRIpNet, test.maskSize, test.allocatorType)
// The code is inconsistent about returning error or panic
// but we have to keep both ways of existing for backwards compatibility
if (err != nil) != test.wantFatal {
t.Errorf("Test %s,Got error %v expected %v", test.desc, err, test.wantFatal)
_, err = newTestNodeIpamController(ctx, clusterCidrs, serviceCIDRIpNet, secondaryServiceCIDRIpNet, test.maskSize, test.allocatorType)
if err != nil {
t.Errorf("Test %s, got error %v", test.desc, err)
}
})
}

7
pkg/controller/nodeipam/nolegacyprovider.go
View File

@@ -21,6 +21,7 @@ package nodeipam
import (
"context"
"errors"
"net"
coreinformers "k8s.io/client-go/informers/core/v1"
@@ -45,8 +46,6 @@ func createLegacyIPAM(
clusterCIDRs []*net.IPNet,
serviceCIDR *net.IPNet,
nodeCIDRMaskSizes []int,
) *fakeController {
logger.Error(nil, "Error trying to Init(): legacy cloud provider support disabled at build time")
klog.FlushAndExit(klog.ExitFlushTimeout, 1)
return &fakeController{}
) (*fakeController, error) {
return nil, errors.New("Error trying to Init(): legacy cloud provider support disabled at build time")
}