mirror of https://github.com/kubernetes/kops.git
519 lines
17 KiB
Go
519 lines
17 KiB
Go
/*
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Copyright 2019 The Kubernetes Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package openstackmodel
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import (
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"github.com/gophercloud/gophercloud/openstack/networking/v2/extensions/security/rules"
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"k8s.io/kops/pkg/apis/kops"
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"k8s.io/kops/upup/pkg/fi"
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"k8s.io/kops/upup/pkg/fi/cloudup/openstacktasks"
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//TODO: Replace with klog
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"k8s.io/klog"
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"k8s.io/kops/pkg/dns"
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)
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const (
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IPProtocolTCP = string(rules.ProtocolTCP)
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IPProtocolUDP = string(rules.ProtocolUDP)
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IPV4 = string(rules.EtherType4)
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ProtocolIPEncap = "4" // IP in IPv4/IPv6
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)
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// FirewallModelBuilder configures firewall network objects
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type FirewallModelBuilder struct {
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*OpenstackModelContext
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Lifecycle *fi.Lifecycle
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}
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var _ fi.ModelBuilder = &FirewallModelBuilder{}
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func (b *FirewallModelBuilder) usesOctavia() bool {
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if b.Cluster.Spec.CloudConfig != nil &&
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b.Cluster.Spec.CloudConfig.Openstack != nil &&
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b.Cluster.Spec.CloudConfig.Openstack.Loadbalancer != nil {
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return fi.BoolValue(b.Cluster.Spec.CloudConfig.Openstack.Loadbalancer.UseOctavia)
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}
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return false
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}
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// addDirectionalGroupRule - create a rule on the source group to the dest group provided a securityGroupRuleTask
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// Example
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// Create an Ingress rule on source allowing traffic from dest with the options in the SecurityGroupRule
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// Create an Egress rule on source allowing traffic to dest with the options in the SecurityGroupRule
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func addDirectionalGroupRule(c *fi.ModelBuilderContext, source, dest *openstacktasks.SecurityGroup, sgr *openstacktasks.SecurityGroupRule) {
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t := &openstacktasks.SecurityGroupRule{
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Direction: sgr.Direction,
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EtherType: sgr.EtherType,
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Lifecycle: sgr.Lifecycle,
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PortRangeMin: sgr.PortRangeMin,
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PortRangeMax: sgr.PortRangeMax,
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Protocol: sgr.Protocol,
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RemoteGroup: dest,
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RemoteIPPrefix: sgr.RemoteIPPrefix,
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SecGroup: source,
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}
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c.AddTask(t)
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}
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// addSSHRules - sets the ssh rules based on the presence of a bastion
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func (b *FirewallModelBuilder) addSSHRules(c *fi.ModelBuilderContext, sgMap map[string]*openstacktasks.SecurityGroup) error {
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masterName := b.SecurityGroupName(kops.InstanceGroupRoleMaster)
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nodeName := b.SecurityGroupName(kops.InstanceGroupRoleNode)
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bastionName := b.SecurityGroupName(kops.InstanceGroupRoleBastion)
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masterSG := sgMap[masterName]
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nodeSG := sgMap[nodeName]
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bastionSG := sgMap[bastionName]
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sshIngress := &openstacktasks.SecurityGroupRule{
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Lifecycle: b.Lifecycle,
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Direction: s(string(rules.DirIngress)),
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Protocol: s(string(rules.ProtocolTCP)),
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EtherType: s(string(rules.EtherType4)),
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PortRangeMin: i(22),
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PortRangeMax: i(22),
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}
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if b.UsesSSHBastion() {
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for _, sshAccess := range b.Cluster.Spec.SSHAccess {
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sshRule := &openstacktasks.SecurityGroupRule{
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Lifecycle: b.Lifecycle,
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Direction: s(string(rules.DirIngress)),
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Protocol: s(string(rules.ProtocolTCP)),
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EtherType: s(string(rules.EtherType4)),
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PortRangeMin: i(22),
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PortRangeMax: i(22),
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RemoteIPPrefix: s(sshAccess),
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}
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addDirectionalGroupRule(c, bastionSG, nil, sshRule)
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}
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//Allow ingress ssh from the bastion on the masters and nodes
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addDirectionalGroupRule(c, masterSG, bastionSG, sshIngress)
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addDirectionalGroupRule(c, nodeSG, bastionSG, sshIngress)
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} else {
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for _, sshAccess := range b.Cluster.Spec.SSHAccess {
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sshRule := &openstacktasks.SecurityGroupRule{
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Lifecycle: b.Lifecycle,
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Direction: s(string(rules.DirIngress)),
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Protocol: s(string(rules.ProtocolTCP)),
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EtherType: s(string(rules.EtherType4)),
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PortRangeMin: i(22),
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PortRangeMax: i(22),
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RemoteIPPrefix: s(sshAccess),
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}
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addDirectionalGroupRule(c, masterSG, nil, sshRule)
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addDirectionalGroupRule(c, nodeSG, nil, sshRule)
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}
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}
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return nil
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}
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// addETCDRules - Add ETCD access rules based on which CNI might need to access __ETCD_ENDPOINTS__
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func (b *FirewallModelBuilder) addETCDRules(c *fi.ModelBuilderContext, sgMap map[string]*openstacktasks.SecurityGroup) error {
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masterName := b.SecurityGroupName(kops.InstanceGroupRoleMaster)
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nodeName := b.SecurityGroupName(kops.InstanceGroupRoleNode)
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masterSG := sgMap[masterName]
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nodeSG := sgMap[nodeName]
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// ETCD Peer Discovery
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etcdRule := &openstacktasks.SecurityGroupRule{
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Lifecycle: b.Lifecycle,
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Direction: s(string(rules.DirIngress)),
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Protocol: s(string(rules.ProtocolTCP)),
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EtherType: s(IPV4),
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PortRangeMin: i(4001),
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PortRangeMax: i(4002),
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}
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etcdPeerRule := &openstacktasks.SecurityGroupRule{
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Lifecycle: b.Lifecycle,
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Direction: s(string(rules.DirIngress)),
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Protocol: s(string(rules.ProtocolTCP)),
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EtherType: s(IPV4),
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PortRangeMin: i(2380),
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PortRangeMax: i(2381),
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}
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addDirectionalGroupRule(c, masterSG, masterSG, etcdRule)
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addDirectionalGroupRule(c, masterSG, masterSG, etcdPeerRule)
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if b.Cluster.Spec.Networking.Romana != nil ||
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b.Cluster.Spec.Networking.Calico != nil {
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etcdCNIRule := &openstacktasks.SecurityGroupRule{
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Lifecycle: b.Lifecycle,
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Direction: s(string(rules.DirIngress)),
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Protocol: s(string(rules.ProtocolTCP)),
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EtherType: s(IPV4),
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PortRangeMin: i(4001),
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PortRangeMax: i(4001),
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}
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// Master access from other masters covered above
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// Allow nodes to reach ETCD endpoints
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addDirectionalGroupRule(c, masterSG, nodeSG, etcdCNIRule)
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}
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return nil
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}
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// addNodePortRules - Add node port rules to nodes give the NodePortRange
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func (b *FirewallModelBuilder) addNodePortRules(c *fi.ModelBuilderContext, sgMap map[string]*openstacktasks.SecurityGroup) error {
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nodeName := b.SecurityGroupName(kops.InstanceGroupRoleNode)
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nodeSG := sgMap[nodeName]
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for _, nodePortAccess := range b.Cluster.Spec.NodePortAccess {
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nodePortRange, err := b.NodePortRange()
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if err != nil {
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return err
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}
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for _, protocol := range []string{IPProtocolTCP, IPProtocolUDP} {
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nodePortRule := &openstacktasks.SecurityGroupRule{
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Lifecycle: b.Lifecycle,
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Direction: s(string(rules.DirIngress)),
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Protocol: s(protocol),
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EtherType: s(IPV4),
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PortRangeMin: i(nodePortRange.Base),
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PortRangeMax: i(nodePortRange.Base + nodePortRange.Size - 1),
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RemoteIPPrefix: s(nodePortAccess),
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}
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addDirectionalGroupRule(c, nodeSG, nil, nodePortRule)
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}
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}
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return nil
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}
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// addHTTPSRules - Add rules to 443 access given the presence of a loadbalancer or not
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func (b *FirewallModelBuilder) addHTTPSRules(c *fi.ModelBuilderContext, sgMap map[string]*openstacktasks.SecurityGroup) error {
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masterName := b.SecurityGroupName(kops.InstanceGroupRoleMaster)
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nodeName := b.SecurityGroupName(kops.InstanceGroupRoleNode)
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lbSGName := b.Cluster.Spec.MasterPublicName
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lbSG := sgMap[lbSGName]
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masterSG := sgMap[masterName]
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nodeSG := sgMap[nodeName]
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httpsIngress := &openstacktasks.SecurityGroupRule{
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Lifecycle: b.Lifecycle,
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Direction: s(string(rules.DirIngress)),
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Protocol: s(IPProtocolTCP),
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EtherType: s(IPV4),
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PortRangeMin: i(443),
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PortRangeMax: i(443),
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}
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//Allow all local communication for kubernetes.svc and to the api.internal lb/gossip for kubelet's
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addDirectionalGroupRule(c, masterSG, nodeSG, httpsIngress)
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addDirectionalGroupRule(c, masterSG, masterSG, httpsIngress)
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if b.UseLoadBalancerForAPI() {
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//Allow API Access to the lb sg
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for _, apiAccess := range b.Cluster.Spec.KubernetesAPIAccess {
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addDirectionalGroupRule(c, lbSG, nil, &openstacktasks.SecurityGroupRule{
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Lifecycle: b.Lifecycle,
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Direction: s(string(rules.DirIngress)),
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Protocol: s(IPProtocolTCP),
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EtherType: s(IPV4),
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PortRangeMin: i(443),
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PortRangeMax: i(443),
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RemoteIPPrefix: s(apiAccess),
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})
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}
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//Allow masters ingress from the sg
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addDirectionalGroupRule(c, masterSG, lbSG, httpsIngress)
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//FIXME: Octavia port traffic appears to be denied though its port is in lbSG
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if b.usesOctavia() {
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addDirectionalGroupRule(c, masterSG, nil, &openstacktasks.SecurityGroupRule{
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Lifecycle: b.Lifecycle,
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Direction: s(string(rules.DirIngress)),
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Protocol: s(IPProtocolTCP),
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EtherType: s(IPV4),
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PortRangeMin: i(443),
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PortRangeMax: i(443),
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RemoteIPPrefix: s(b.Cluster.Spec.NetworkCIDR),
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})
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}
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} else {
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// Allow the masters to receive connections from KubernetesAPIAccess
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for _, apiAccess := range b.Cluster.Spec.KubernetesAPIAccess {
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addDirectionalGroupRule(c, masterSG, nil, &openstacktasks.SecurityGroupRule{
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Lifecycle: b.Lifecycle,
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Direction: s(string(rules.DirIngress)),
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Protocol: s(IPProtocolTCP),
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EtherType: s(IPV4),
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PortRangeMin: i(443),
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PortRangeMax: i(443),
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RemoteIPPrefix: s(apiAccess),
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})
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}
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}
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return nil
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}
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// addKubeletRules - Add rules to 10250 port
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func (b *FirewallModelBuilder) addKubeletRules(c *fi.ModelBuilderContext, sgMap map[string]*openstacktasks.SecurityGroup) error {
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//TODO: This is the default port for kubelet and may be overwridden
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masterName := b.SecurityGroupName(kops.InstanceGroupRoleMaster)
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nodeName := b.SecurityGroupName(kops.InstanceGroupRoleNode)
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masterSG := sgMap[masterName]
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nodeSG := sgMap[nodeName]
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kubeletRule := &openstacktasks.SecurityGroupRule{
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Lifecycle: b.Lifecycle,
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Direction: s(string(rules.DirIngress)),
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Protocol: s(IPProtocolTCP),
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EtherType: s(IPV4),
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PortRangeMin: i(10250),
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PortRangeMax: i(10250),
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}
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// allow node-node, node-master and master-master and master-node
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for _, sgName := range []*openstacktasks.SecurityGroup{masterSG, nodeSG} {
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addDirectionalGroupRule(c, masterSG, sgName, kubeletRule)
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addDirectionalGroupRule(c, nodeSG, sgName, kubeletRule)
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}
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return nil
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}
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// addNodeExporterRules - Allow 9100 TCP port from nodesg
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func (b *FirewallModelBuilder) addNodeExporterRules(c *fi.ModelBuilderContext, sgMap map[string]*openstacktasks.SecurityGroup) error {
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masterName := b.SecurityGroupName(kops.InstanceGroupRoleMaster)
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nodeName := b.SecurityGroupName(kops.InstanceGroupRoleNode)
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masterSG := sgMap[masterName]
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nodeSG := sgMap[nodeName]
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nodeExporterIngress := &openstacktasks.SecurityGroupRule{
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Lifecycle: b.Lifecycle,
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Direction: s(string(rules.DirIngress)),
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Protocol: s(IPProtocolTCP),
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EtherType: s(IPV4),
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PortRangeMin: i(9100),
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PortRangeMax: i(9100),
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}
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// allow 9100 port from nodeSG
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addDirectionalGroupRule(c, masterSG, nodeSG, nodeExporterIngress)
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addDirectionalGroupRule(c, nodeSG, nodeSG, nodeExporterIngress)
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return nil
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}
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// addDNSRules - Add DNS rules for internal DNS queries
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func (b *FirewallModelBuilder) addDNSRules(c *fi.ModelBuilderContext, sgMap map[string]*openstacktasks.SecurityGroup) error {
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masterName := b.SecurityGroupName(kops.InstanceGroupRoleMaster)
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nodeName := b.SecurityGroupName(kops.InstanceGroupRoleNode)
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masterSG := sgMap[masterName]
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nodeSG := sgMap[nodeName]
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for _, protocol := range []string{IPProtocolTCP, IPProtocolUDP} {
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dnsRule := &openstacktasks.SecurityGroupRule{
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Lifecycle: b.Lifecycle,
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Direction: s(string(rules.DirIngress)),
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Protocol: s(protocol),
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EtherType: s(IPV4),
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PortRangeMin: i(53),
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PortRangeMax: i(53),
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}
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addDirectionalGroupRule(c, masterSG, nodeSG, dnsRule)
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addDirectionalGroupRule(c, nodeSG, masterSG, dnsRule)
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addDirectionalGroupRule(c, masterSG, masterSG, dnsRule)
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}
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return nil
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}
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// addCNIRules - Add ports required for different CNI implementations
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func (b *FirewallModelBuilder) addCNIRules(c *fi.ModelBuilderContext, sgMap map[string]*openstacktasks.SecurityGroup) error {
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udpPorts := []int{}
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tcpPorts := []int{}
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protocols := []string{}
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// allow cadvisor
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tcpPorts = append(tcpPorts, 4194)
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if b.Cluster.Spec.Networking != nil {
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if b.Cluster.Spec.Networking.Kopeio != nil {
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// VXLAN over UDP
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// https://tools.ietf.org/html/rfc7348
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udpPorts = append(udpPorts, 4789)
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}
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if b.Cluster.Spec.Networking.Weave != nil {
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udpPorts = append(udpPorts, 6783)
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tcpPorts = append(tcpPorts, 6783)
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udpPorts = append(udpPorts, 6784)
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}
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if b.Cluster.Spec.Networking.Flannel != nil {
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switch b.Cluster.Spec.Networking.Flannel.Backend {
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case "", "udp":
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udpPorts = append(udpPorts, 8285)
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case "vxlan":
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udpPorts = append(udpPorts, 8472)
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default:
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klog.Warningf("unknown flannel networking backend %q", b.Cluster.Spec.Networking.Flannel.Backend)
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}
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}
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if b.Cluster.Spec.Networking.Calico != nil {
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tcpPorts = append(tcpPorts, 179)
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protocols = append(protocols, ProtocolIPEncap)
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}
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if b.Cluster.Spec.Networking.Romana != nil {
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tcpPorts = append(tcpPorts, 9600)
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}
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if b.Cluster.Spec.Networking.Kuberouter != nil {
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protocols = append(protocols, ProtocolIPEncap)
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}
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}
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masterName := b.SecurityGroupName(kops.InstanceGroupRoleMaster)
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nodeName := b.SecurityGroupName(kops.InstanceGroupRoleNode)
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masterSG := sgMap[masterName]
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nodeSG := sgMap[nodeName]
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for _, udpPort := range udpPorts {
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udpRule := &openstacktasks.SecurityGroupRule{
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Lifecycle: b.Lifecycle,
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Direction: s(string(rules.DirIngress)),
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Protocol: s(string(rules.ProtocolUDP)),
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EtherType: s(string(rules.EtherType4)),
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PortRangeMin: i(udpPort),
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PortRangeMax: i(udpPort),
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RemoteIPPrefix: s(b.Cluster.Spec.NetworkCIDR),
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}
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addDirectionalGroupRule(c, masterSG, nil, udpRule)
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addDirectionalGroupRule(c, nodeSG, nil, udpRule)
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}
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for _, tcpPort := range tcpPorts {
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tcpRule := &openstacktasks.SecurityGroupRule{
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Lifecycle: b.Lifecycle,
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Direction: s(string(rules.DirIngress)),
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Protocol: s(string(rules.ProtocolTCP)),
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EtherType: s(string(rules.EtherType4)),
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PortRangeMin: i(tcpPort),
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PortRangeMax: i(tcpPort),
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RemoteIPPrefix: s(b.Cluster.Spec.NetworkCIDR),
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}
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addDirectionalGroupRule(c, masterSG, nil, tcpRule)
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addDirectionalGroupRule(c, nodeSG, nil, tcpRule)
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}
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for _, protocol := range protocols {
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protocolRule := &openstacktasks.SecurityGroupRule{
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Lifecycle: b.Lifecycle,
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Direction: s(string(rules.DirIngress)),
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Protocol: s(protocol),
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EtherType: s(string(rules.EtherType4)),
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}
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addDirectionalGroupRule(c, nodeSG, masterSG, protocolRule)
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}
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return nil
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}
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// addProtokubeRules - Add rules for protokube if gossip DNS is enabled
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func (b *FirewallModelBuilder) addProtokubeRules(c *fi.ModelBuilderContext, sgMap map[string]*openstacktasks.SecurityGroup) error {
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if dns.IsGossipHostname(b.ClusterName()) {
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masterName := b.SecurityGroupName(kops.InstanceGroupRoleMaster)
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nodeName := b.SecurityGroupName(kops.InstanceGroupRoleNode)
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masterSG := sgMap[masterName]
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nodeSG := sgMap[nodeName]
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protokubeRule := &openstacktasks.SecurityGroupRule{
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Lifecycle: b.Lifecycle,
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Direction: s(string(rules.DirIngress)),
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Protocol: s(string(rules.ProtocolTCP)),
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EtherType: s(string(rules.EtherType4)),
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PortRangeMin: i(3994),
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PortRangeMax: i(3999),
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}
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addDirectionalGroupRule(c, masterSG, nodeSG, protokubeRule)
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addDirectionalGroupRule(c, nodeSG, masterSG, protokubeRule)
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addDirectionalGroupRule(c, masterSG, masterSG, protokubeRule)
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addDirectionalGroupRule(c, nodeSG, nodeSG, protokubeRule)
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}
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return nil
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}
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// Build - schedule security groups and security group rule tasks for Openstack
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func (b *FirewallModelBuilder) Build(c *fi.ModelBuilderContext) error {
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roles := []kops.InstanceGroupRole{kops.InstanceGroupRoleMaster, kops.InstanceGroupRoleNode}
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if b.UsesSSHBastion() {
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roles = append(roles, kops.InstanceGroupRoleBastion)
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}
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sgMap := make(map[string]*openstacktasks.SecurityGroup)
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if b.UseLoadBalancerForAPI() {
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sg := &openstacktasks.SecurityGroup{
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Name: s(b.Cluster.Spec.MasterPublicName),
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Lifecycle: b.Lifecycle,
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RemoveExtraRules: []string{"port=443"},
|
|
}
|
|
c.AddTask(sg)
|
|
sgMap[b.Cluster.Spec.MasterPublicName] = sg
|
|
}
|
|
for _, role := range roles {
|
|
|
|
// Create Security Group for Role
|
|
groupName := b.SecurityGroupName(role)
|
|
sg := &openstacktasks.SecurityGroup{
|
|
Name: s(groupName),
|
|
Lifecycle: b.Lifecycle,
|
|
}
|
|
if role == kops.InstanceGroupRoleBastion {
|
|
sg.RemoveExtraRules = []string{"port=22"}
|
|
} else if role == kops.InstanceGroupRoleNode {
|
|
sg.RemoveExtraRules = []string{"port=22", "port=10250"}
|
|
} else if role == kops.InstanceGroupRoleMaster {
|
|
sg.RemoveExtraRules = []string{"port=22", "port=443", "port=10250"}
|
|
}
|
|
c.AddTask(sg)
|
|
sgMap[groupName] = sg
|
|
}
|
|
|
|
//Add API Server Rules
|
|
b.addHTTPSRules(c, sgMap)
|
|
//Add SSH
|
|
b.addSSHRules(c, sgMap)
|
|
//Allow overlay DNS
|
|
b.addDNSRules(c, sgMap)
|
|
//Add Kubelet Rules
|
|
b.addKubeletRules(c, sgMap)
|
|
//Add Node exporter Rules
|
|
b.addNodeExporterRules(c, sgMap)
|
|
// Protokube Rules
|
|
b.addProtokubeRules(c, sgMap)
|
|
//Allow necessary local traffic
|
|
b.addCNIRules(c, sgMap)
|
|
//ETCD Leader Election
|
|
b.addETCDRules(c, sgMap)
|
|
// Add NodePort Rules:
|
|
err := b.addNodePortRules(c, sgMap)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
return nil
|
|
|
|
}
|