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Allow multiple node cidr masks in cm

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update tests

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amend var name

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add check for empty slice

fix tests

fix mask size in test

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add ipv4 and ipv6 flag for mask sizes

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This commit is contained in:
Anish Ramasekar
2019-07-09 14:47:01 -07:00
parent cb2684c416
commit 796faba4ac
17 changed files with 343 additions and 198 deletions
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75
cmd/kube-controller-manager/app/core.go
View File

@@ -21,6 +21,7 @@ limitations under the License.
package app
import (
"errors"
"fmt"
"net"
"net/http"
@@ -29,7 +30,7 @@ import (
"k8s.io/klog"
v1 "k8s.io/api/core/v1"
"k8s.io/api/core/v1"
"k8s.io/apimachinery/pkg/runtime/schema"
utilfeature "k8s.io/apiserver/pkg/util/feature"
cacheddiscovery "k8s.io/client-go/discovery/cached/memory"
@@ -46,6 +47,7 @@ import (
"k8s.io/kubernetes/pkg/controller/garbagecollector"
namespacecontroller "k8s.io/kubernetes/pkg/controller/namespace"
nodeipamcontroller "k8s.io/kubernetes/pkg/controller/nodeipam"
nodeipamconfig "k8s.io/kubernetes/pkg/controller/nodeipam/config"
"k8s.io/kubernetes/pkg/controller/nodeipam/ipam"
lifecyclecontroller "k8s.io/kubernetes/pkg/controller/nodelifecycle"
"k8s.io/kubernetes/pkg/controller/podgc"
@@ -68,6 +70,13 @@ import (
netutils "k8s.io/utils/net"
)
const (
// defaultNodeMaskCIDRIPv4 is default mask size for IPv4 node cidr
defaultNodeMaskCIDRIPv4 = 24
// defaultNodeMaskCIDRIPv6 is default mask size for IPv6 node cidr
defaultNodeMaskCIDRIPv6 = 64
)
func startServiceController(ctx ControllerContext) (http.Handler, bool, error) {
serviceController, err := servicecontroller.New(
ctx.Cloud,
@@ -84,6 +93,7 @@ func startServiceController(ctx ControllerContext) (http.Handler, bool, error) {
go serviceController.Run(ctx.Stop, int(ctx.ComponentConfig.ServiceController.ConcurrentServiceSyncs))
return nil, true, nil
}
func startNodeIpamController(ctx ControllerContext) (http.Handler, bool, error) {
var serviceCIDR *net.IPNet
var secondaryServiceCIDR *net.IPNet
@@ -146,6 +156,20 @@ func startNodeIpamController(ctx ControllerContext) (http.Handler, bool, error)
}
}
var nodeCIDRMaskSizeIPv4, nodeCIDRMaskSizeIPv6 int
if utilfeature.DefaultFeatureGate.Enabled(kubefeatures.IPv6DualStack) {
nodeCIDRMaskSizeIPv4, nodeCIDRMaskSizeIPv6, err = setNodeCIDRMaskSizesDualStack(ctx.ComponentConfig.NodeIPAMController)
} else {
nodeCIDRMaskSizeIPv4, nodeCIDRMaskSizeIPv6, err = setNodeCIDRMaskSizes(ctx.ComponentConfig.NodeIPAMController)
}
if err != nil {
return nil, false, err
}
// get list of node cidr mask sizes
nodeCIDRMaskSizes := getNodeCIDRMaskSizes(clusterCIDRs, nodeCIDRMaskSizeIPv4, nodeCIDRMaskSizeIPv6)
nodeIpamController, err := nodeipamcontroller.NewNodeIpamController(
ctx.InformerFactory.Core().V1().Nodes(),
ctx.Cloud,
@@ -153,7 +177,7 @@ func startNodeIpamController(ctx ControllerContext) (http.Handler, bool, error)
clusterCIDRs,
serviceCIDR,
secondaryServiceCIDR,
int(ctx.ComponentConfig.NodeIPAMController.NodeCIDRMaskSize),
nodeCIDRMaskSizes,
ipam.CIDRAllocatorType(ctx.ComponentConfig.KubeCloudShared.CIDRAllocatorType),
)
if err != nil {
@@ -546,3 +570,50 @@ func processCIDRs(cidrsList string) ([]*net.IPNet, bool, error) {
return cidrs, dualstack, nil
}
// setNodeCIDRMaskSizes returns the IPv4 and IPv6 node cidr mask sizes.
// If --node-cidr-mask-size not set, then it will return default IPv4 and IPv6 cidr mask sizes.
func setNodeCIDRMaskSizes(cfg nodeipamconfig.NodeIPAMControllerConfiguration) (int, int, error) {
ipv4Mask, ipv6Mask := defaultNodeMaskCIDRIPv4, defaultNodeMaskCIDRIPv6
// NodeCIDRMaskSizeIPv4 and NodeCIDRMaskSizeIPv6 can be used only for dual-stack clusters
if cfg.NodeCIDRMaskSizeIPv4 != 0 || cfg.NodeCIDRMaskSizeIPv6 != 0 {
return ipv4Mask, ipv6Mask, errors.New("usage of --node-cidr-mask-size-ipv4 and --node-cidr-mask-size-ipv6 are not allowed with non dual-stack clusters")
}
if cfg.NodeCIDRMaskSize != 0 {
ipv4Mask = int(cfg.NodeCIDRMaskSize)
ipv6Mask = int(cfg.NodeCIDRMaskSize)
}
return ipv4Mask, ipv6Mask, nil
}
// setNodeCIDRMaskSizesDualStack returns the IPv4 and IPv6 node cidr mask sizes to the value provided
// for --node-cidr-mask-size-ipv4 and --node-cidr-mask-size-ipv6 respectively. If value not provided,
// then it will return default IPv4 and IPv6 cidr mask sizes.
func setNodeCIDRMaskSizesDualStack(cfg nodeipamconfig.NodeIPAMControllerConfiguration) (int, int, error) {
ipv4Mask, ipv6Mask := defaultNodeMaskCIDRIPv4, defaultNodeMaskCIDRIPv6
// NodeCIDRMaskSize can be used only for single stack clusters
if cfg.NodeCIDRMaskSize != 0 {
return ipv4Mask, ipv6Mask, errors.New("usage of --node-cidr-mask-size is not allowed with dual-stack clusters")
}
if cfg.NodeCIDRMaskSizeIPv4 != 0 {
ipv4Mask = int(cfg.NodeCIDRMaskSizeIPv4)
}
if cfg.NodeCIDRMaskSizeIPv6 != 0 {
ipv6Mask = int(cfg.NodeCIDRMaskSizeIPv6)
}
return ipv4Mask, ipv6Mask, nil
}
// getNodeCIDRMaskSizes is a helper function that helps the generate the node cidr mask
// sizes slice based on the cluster cidr slice
func getNodeCIDRMaskSizes(clusterCIDRs []*net.IPNet, maskSizeIPv4, maskSizeIPv6 int) []int {
nodeMaskCIDRs := []int{}
for _, clusterCIDR := range clusterCIDRs {
if netutils.IsIPv6CIDR(clusterCIDR) {
nodeMaskCIDRs = append(nodeMaskCIDRs, maskSizeIPv6)
} else {
nodeMaskCIDRs = append(nodeMaskCIDRs, maskSizeIPv4)
}
}
return nodeMaskCIDRs
}