node_ipam_controller_test.go

Documentation: k8s.io/kubernetes/pkg/controller/nodeipam

     1  //go:build !providerless
     2  // +build !providerless
     3  
     4  /*
     5  Copyright 2018 The Kubernetes Authors.
     6  
     7  Licensed under the Apache License, Version 2.0 (the "License");
     8  you may not use this file except in compliance with the License.
     9  You may obtain a copy of the License at
    10  
    11      http://www.apache.org/licenses/LICENSE-2.0
    12  
    13  Unless required by applicable law or agreed to in writing, software
    14  distributed under the License is distributed on an "AS IS" BASIS,
    15  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    16  See the License for the specific language governing permissions and
    17  limitations under the License.
    18  */
    19  
    20  package nodeipam
    21  
    22  import (
    23  	"context"
    24  	"errors"
    25  	"net"
    26  	"strings"
    27  	"testing"
    28  
    29  	v1 "k8s.io/api/core/v1"
    30  	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
    31  	"k8s.io/client-go/informers"
    32  	"k8s.io/client-go/kubernetes/fake"
    33  	"k8s.io/klog/v2/ktesting"
    34  	"k8s.io/kubernetes/pkg/controller/nodeipam/ipam"
    35  	"k8s.io/kubernetes/pkg/controller/testutil"
    36  	"k8s.io/legacy-cloud-providers/gce"
    37  	netutils "k8s.io/utils/net"
    38  )
    39  
    40  func newTestNodeIpamController(ctx context.Context, clusterCIDR []*net.IPNet, serviceCIDR *net.IPNet, secondaryServiceCIDR *net.IPNet, nodeCIDRMaskSizes []int, allocatorType ipam.CIDRAllocatorType) (*Controller, error) {
    41  	clientSet := fake.NewSimpleClientset()
    42  	fakeNodeHandler := &testutil.FakeNodeHandler{
    43  		Existing: []*v1.Node{
    44  			{ObjectMeta: metav1.ObjectMeta{Name: "node0"}},
    45  		},
    46  		Clientset: fake.NewSimpleClientset(),
    47  	}
    48  	fakeClient := &fake.Clientset{}
    49  	fakeInformerFactory := informers.NewSharedInformerFactory(fakeClient, 0)
    50  	fakeNodeInformer := fakeInformerFactory.Core().V1().Nodes()
    51  
    52  	for _, node := range fakeNodeHandler.Existing {
    53  		fakeNodeInformer.Informer().GetStore().Add(node)
    54  	}
    55  
    56  	fakeGCE := gce.NewFakeGCECloud(gce.DefaultTestClusterValues())
    57  	return NewNodeIpamController(
    58  		ctx,
    59  		fakeNodeInformer, fakeGCE, clientSet,
    60  		clusterCIDR, serviceCIDR, secondaryServiceCIDR, nodeCIDRMaskSizes, allocatorType,
    61  	)
    62  }
    63  
    64  // TestNewNodeIpamControllerWithCIDRMasks tests if the controller can be
    65  // created with combinations of network CIDRs and masks.
    66  func TestNewNodeIpamControllerWithCIDRMasks(t *testing.T) {
    67  	emptyServiceCIDR := ""
    68  	for _, tc := range []struct {
    69  		desc                 string
    70  		clusterCIDR          string
    71  		serviceCIDR          string
    72  		secondaryServiceCIDR string
    73  		maskSize             []int
    74  		allocatorType        ipam.CIDRAllocatorType
    75  		expectedError        error
    76  	}{
    77  		{"valid_range_allocator", "10.0.0.0/21", "10.1.0.0/21", emptyServiceCIDR, []int{24}, ipam.RangeAllocatorType, nil},
    78  		{"valid_range_allocator_dualstack", "10.0.0.0/21,2000::/48", "10.1.0.0/21", emptyServiceCIDR, []int{24, 64}, ipam.RangeAllocatorType, nil},
    79  		{"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},
    80  		{"valid_cloud_allocator", "10.0.0.0/21", "10.1.0.0/21", emptyServiceCIDR, []int{24}, ipam.CloudAllocatorType, nil},
    81  		{"valid_ipam_from_cluster", "10.0.0.0/21", "10.1.0.0/21", emptyServiceCIDR, []int{24}, ipam.IPAMFromClusterAllocatorType, nil},
    82  		{"valid_ipam_from_cloud", "10.0.0.0/21", "10.1.0.0/21", emptyServiceCIDR, []int{24}, ipam.IPAMFromCloudAllocatorType, nil},
    83  		{"valid_skip_cluster_CIDR_validation_for_cloud_allocator", "invalid", "10.1.0.0/21", emptyServiceCIDR, []int{24}, ipam.CloudAllocatorType, nil},
    84  		{"valid_CIDR_larger_than_mask_cloud_allocator", "10.0.0.0/16", "10.1.0.0/21", emptyServiceCIDR, []int{24}, ipam.CloudAllocatorType, nil},
    85  		{"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")},
    86  		{"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")},
    87  		{"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")},
    88  		{"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")},
    89  	} {
    90  		test := tc
    91  		_, ctx := ktesting.NewTestContext(t)
    92  		t.Run(test.desc, func(t *testing.T) {
    93  			t.Parallel()
    94  			clusterCidrs, err := netutils.ParseCIDRs(strings.Split(test.clusterCIDR, ","))
    95  			if err != nil {
    96  				clusterCidrs = nil
    97  			}
    98  			_, serviceCIDRIpNet, err := netutils.ParseCIDRSloppy(test.serviceCIDR)
    99  			if err != nil {
   100  				serviceCIDRIpNet = nil
   101  			}
   102  			_, secondaryServiceCIDRIpNet, err := netutils.ParseCIDRSloppy(test.secondaryServiceCIDR)
   103  			if err != nil {
   104  				secondaryServiceCIDRIpNet = nil
   105  			}
   106  			_, err = newTestNodeIpamController(ctx, clusterCidrs, serviceCIDRIpNet, secondaryServiceCIDRIpNet, test.maskSize, test.allocatorType)
   107  			if test.expectedError == nil {
   108  				if err != nil {
   109  					t.Errorf("Test %s, unexpected error: %v", test.desc, err)
   110  				}
   111  			} else {
   112  				if err.Error() != test.expectedError.Error() {
   113  					t.Errorf("Test %s, got error: %v, expected error: %v", test.desc, err, test.expectedError)
   114  				}
   115  			}
   116  		})
   117  	}
   118  }
   119
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