mirror of https://github.com/kubernetes/kops.git
118 lines
3.5 KiB
Go
118 lines
3.5 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 alimodel
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import (
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"strconv"
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"k8s.io/klog/v2"
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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/alitasks"
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)
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const (
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IpProtocolTCP = "tcp"
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IpProtocolUDP = "udp"
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)
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// ExternalAccessModelBuilder configures security group rules for external access
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// (SSHAccess, KubernetesAPIAccess)
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type ExternalAccessModelBuilder struct {
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*ALIModelContext
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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 *ExternalAccessModelBuilder) Build(c *fi.ModelBuilderContext) error {
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if len(b.Cluster.Spec.SSHAccess) == 0 {
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klog.Warningf("SSHAccess is empty")
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}
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// SSH is open to AdminCIDR set
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if b.UsesSSHBastion() {
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// If we are using a bastion, we only access through the bastion
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// This is admittedly a little odd... adding a bastion shuts down direct access to the masters/nodes
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// But I think we can always add more permissions in this case later, but we can't easily take them away
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klog.V(2).Infof("bastion is in use; won't configure SSH access to master / node instances")
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} else {
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for _, sshAccess := range b.Cluster.Spec.SSHAccess {
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ipProtocolTCP := IpProtocolTCP
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t := &alitasks.SecurityGroupRule{
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Name: s("ssh-external-to-master-" + sshAccess),
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Lifecycle: b.Lifecycle,
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SecurityGroup: b.LinkToSecurityGroup(kops.InstanceGroupRoleMaster),
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IpProtocol: s(ipProtocolTCP),
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PortRange: s("22/22"),
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SourceCidrIp: s(sshAccess),
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In: fi.Bool(true),
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}
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c.AddTask(t)
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t = &alitasks.SecurityGroupRule{
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Name: s("ssh-external-to-node-" + sshAccess),
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Lifecycle: b.Lifecycle,
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SecurityGroup: b.LinkToSecurityGroup(kops.InstanceGroupRoleNode),
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IpProtocol: s(ipProtocolTCP),
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PortRange: s("22/22"),
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SourceCidrIp: s(sshAccess),
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In: fi.Bool(true),
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}
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c.AddTask(t)
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}
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}
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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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ipProtocolTCP := IpProtocolTCP
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ipProtocolUDP := IpProtocolUDP
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fromPort := strconv.Itoa(nodePortRange.Base)
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toPort := strconv.Itoa(nodePortRange.Base + nodePortRange.Size - 1)
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t := &alitasks.SecurityGroupRule{
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Name: s("nodeport-tcp-external-to-node-" + nodePortAccess),
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Lifecycle: b.Lifecycle,
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SecurityGroup: b.LinkToSecurityGroup(kops.InstanceGroupRoleNode),
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IpProtocol: s(ipProtocolTCP),
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PortRange: s(fromPort + "/" + toPort),
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SourceCidrIp: s(nodePortAccess),
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In: fi.Bool(true),
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}
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c.AddTask(t)
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t = &alitasks.SecurityGroupRule{
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Name: s("nodeport-udp-external-to-node-" + nodePortAccess),
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Lifecycle: b.Lifecycle,
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SecurityGroup: b.LinkToSecurityGroup(kops.InstanceGroupRoleNode),
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IpProtocol: s(ipProtocolUDP),
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PortRange: s(fromPort + "/" + toPort),
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SourceCidrIp: s(nodePortAccess),
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In: fi.Bool(true),
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}
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c.AddTask(t)
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}
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return nil
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}
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