mirror of https://github.com/kubernetes/kops.git
309 lines
8.9 KiB
Go
309 lines
8.9 KiB
Go
/*
|
|
Copyright 2016 The Kubernetes Authors.
|
|
|
|
Licensed under the Apache License, Version 2.0 (the "License");
|
|
you may not use this file except in compliance with the License.
|
|
You may obtain a copy of the License at
|
|
|
|
http://www.apache.org/licenses/LICENSE-2.0
|
|
|
|
Unless required by applicable law or agreed to in writing, software
|
|
distributed under the License is distributed on an "AS IS" BASIS,
|
|
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
See the License for the specific language governing permissions and
|
|
limitations under the License.
|
|
*/
|
|
|
|
package model
|
|
|
|
import (
|
|
"fmt"
|
|
"strconv"
|
|
|
|
"k8s.io/kops/pkg/apis/kops"
|
|
"k8s.io/kops/upup/pkg/fi"
|
|
"k8s.io/kops/upup/pkg/fi/cloudup/awstasks"
|
|
|
|
"github.com/golang/glog"
|
|
)
|
|
|
|
type Protocol int
|
|
|
|
const (
|
|
ProtocolIPIP Protocol = 4
|
|
)
|
|
|
|
// FirewallModelBuilder configures firewall network objects
|
|
type FirewallModelBuilder struct {
|
|
*KopsModelContext
|
|
Lifecycle *fi.Lifecycle
|
|
}
|
|
|
|
var _ fi.ModelBuilder = &FirewallModelBuilder{}
|
|
|
|
func (b *FirewallModelBuilder) Build(c *fi.ModelBuilderContext) error {
|
|
if err := b.buildNodeRules(c); err != nil {
|
|
return err
|
|
}
|
|
if err := b.buildMasterRules(c); err != nil {
|
|
return err
|
|
}
|
|
return nil
|
|
}
|
|
|
|
func (b *FirewallModelBuilder) buildNodeRules(c *fi.ModelBuilderContext) error {
|
|
name := "nodes." + b.ClusterName()
|
|
|
|
{
|
|
t := &awstasks.SecurityGroup{
|
|
Name: s(name),
|
|
Lifecycle: b.Lifecycle,
|
|
VPC: b.LinkToVPC(),
|
|
Description: s("Security group for nodes"),
|
|
RemoveExtraRules: []string{"port=22"},
|
|
}
|
|
c.AddTask(t)
|
|
}
|
|
|
|
// Allow full egress
|
|
{
|
|
t := &awstasks.SecurityGroupRule{
|
|
Name: s("node-egress"),
|
|
Lifecycle: b.Lifecycle,
|
|
SecurityGroup: b.LinkToSecurityGroup(kops.InstanceGroupRoleNode),
|
|
Egress: fi.Bool(true),
|
|
CIDR: s("0.0.0.0/0"),
|
|
}
|
|
c.AddTask(t)
|
|
}
|
|
|
|
// Nodes can talk to nodes
|
|
{
|
|
t := &awstasks.SecurityGroupRule{
|
|
Name: s("all-node-to-node"),
|
|
Lifecycle: b.Lifecycle,
|
|
SecurityGroup: b.LinkToSecurityGroup(kops.InstanceGroupRoleNode),
|
|
SourceGroup: b.LinkToSecurityGroup(kops.InstanceGroupRoleNode),
|
|
}
|
|
c.AddTask(t)
|
|
}
|
|
|
|
// We _should_ block per port... but:
|
|
// * It causes e2e tests to break
|
|
// * Users expect to be able to reach pods
|
|
// * If users are running an overlay, we punch a hole in it anyway
|
|
//b.applyNodeToMasterAllowSpecificPorts(c)
|
|
b.applyNodeToMasterBlockSpecificPorts(c)
|
|
|
|
return nil
|
|
}
|
|
|
|
func (b *FirewallModelBuilder) applyNodeToMasterAllowSpecificPorts(c *fi.ModelBuilderContext) {
|
|
// TODO: We need to remove the ALL rule
|
|
//W1229 12:32:22.300132 9003 executor.go:109] error running task "SecurityGroupRule/node-to-master-443" (9m58s remaining to succeed): error creating SecurityGroupIngress: InvalidPermission.Duplicate: the specified rule "peer: sg-f6b1a68b, ALL, ALLOW" already exists
|
|
//status code: 400, request id: 6a69627f-9a26-4bd0-b294-a9a96f89bc46
|
|
|
|
udpPorts := []int64{}
|
|
tcpPorts := []int64{}
|
|
protocols := []Protocol{}
|
|
|
|
// allow access to API
|
|
tcpPorts = append(tcpPorts, 443)
|
|
|
|
// allow cadvisor
|
|
tcpPorts = append(tcpPorts, 4194)
|
|
|
|
// kubelet read-only used by heapster
|
|
tcpPorts = append(tcpPorts, 10255)
|
|
|
|
if b.Cluster.Spec.Networking != nil {
|
|
if b.Cluster.Spec.Networking.Kopeio != nil {
|
|
// VXLAN over UDP
|
|
udpPorts = append(udpPorts, 4789)
|
|
}
|
|
|
|
if b.Cluster.Spec.Networking.Weave != nil {
|
|
udpPorts = append(udpPorts, 6783)
|
|
tcpPorts = append(tcpPorts, 6783)
|
|
udpPorts = append(udpPorts, 6784)
|
|
}
|
|
|
|
if b.Cluster.Spec.Networking.Flannel != nil {
|
|
udpPorts = append(udpPorts, 8285)
|
|
}
|
|
|
|
if b.Cluster.Spec.Networking.Calico != nil {
|
|
// Calico needs to access etcd
|
|
// TODO: Remove, replace with etcd in calico manifest
|
|
// https://coreos.com/etcd/docs/latest/v2/configuration.html
|
|
glog.Warningf("Opening etcd port on masters for access from the nodes, for calico. This is unsafe in untrusted environments.")
|
|
tcpPorts = append(tcpPorts, 4001)
|
|
tcpPorts = append(tcpPorts, 179)
|
|
protocols = append(protocols, ProtocolIPIP)
|
|
}
|
|
}
|
|
|
|
for _, udpPort := range udpPorts {
|
|
c.AddTask(&awstasks.SecurityGroupRule{
|
|
Name: s(fmt.Sprintf("node-to-master-udp-%d", udpPort)),
|
|
Lifecycle: b.Lifecycle,
|
|
SecurityGroup: b.LinkToSecurityGroup(kops.InstanceGroupRoleMaster),
|
|
SourceGroup: b.LinkToSecurityGroup(kops.InstanceGroupRoleNode),
|
|
FromPort: i64(udpPort),
|
|
ToPort: i64(udpPort),
|
|
Protocol: s("udp"),
|
|
})
|
|
}
|
|
for _, tcpPort := range tcpPorts {
|
|
c.AddTask(&awstasks.SecurityGroupRule{
|
|
Name: s(fmt.Sprintf("node-to-master-tcp-%d", tcpPort)),
|
|
Lifecycle: b.Lifecycle,
|
|
SecurityGroup: b.LinkToSecurityGroup(kops.InstanceGroupRoleMaster),
|
|
SourceGroup: b.LinkToSecurityGroup(kops.InstanceGroupRoleNode),
|
|
FromPort: i64(tcpPort),
|
|
ToPort: i64(tcpPort),
|
|
Protocol: s("tcp"),
|
|
})
|
|
}
|
|
for _, protocol := range protocols {
|
|
awsName := strconv.Itoa(int(protocol))
|
|
name := awsName
|
|
switch protocol {
|
|
case ProtocolIPIP:
|
|
name = "ipip"
|
|
default:
|
|
glog.Warningf("unknown protocol %q - naming by number", awsName)
|
|
}
|
|
|
|
c.AddTask(&awstasks.SecurityGroupRule{
|
|
Name: s("node-to-master-protocol-" + name),
|
|
Lifecycle: b.Lifecycle,
|
|
SecurityGroup: b.LinkToSecurityGroup(kops.InstanceGroupRoleMaster),
|
|
SourceGroup: b.LinkToSecurityGroup(kops.InstanceGroupRoleNode),
|
|
Protocol: s(awsName),
|
|
})
|
|
}
|
|
}
|
|
|
|
func (b *FirewallModelBuilder) applyNodeToMasterBlockSpecificPorts(c *fi.ModelBuilderContext) {
|
|
type portRange struct {
|
|
From int
|
|
To int
|
|
}
|
|
|
|
// TODO: Make less hacky
|
|
// TODO: Fix management - we need a wildcard matcher now
|
|
tcpRanges := []portRange{{From: 1, To: 4000}, {From: 4003, To: 65535}}
|
|
udpRanges := []portRange{{From: 1, To: 65535}}
|
|
protocols := []Protocol{}
|
|
|
|
if b.Cluster.Spec.Networking.Calico != nil {
|
|
// Calico needs to access etcd
|
|
// TODO: Remove, replace with etcd in calico manifest
|
|
glog.Warningf("Opening etcd port on masters for access from the nodes, for calico. This is unsafe in untrusted environments.")
|
|
tcpRanges = []portRange{{From: 1, To: 4001}, {From: 4003, To: 65535}}
|
|
protocols = append(protocols, ProtocolIPIP)
|
|
}
|
|
|
|
for _, r := range udpRanges {
|
|
c.AddTask(&awstasks.SecurityGroupRule{
|
|
Name: s(fmt.Sprintf("node-to-master-udp-%d-%d", r.From, r.To)),
|
|
Lifecycle: b.Lifecycle,
|
|
SecurityGroup: b.LinkToSecurityGroup(kops.InstanceGroupRoleMaster),
|
|
SourceGroup: b.LinkToSecurityGroup(kops.InstanceGroupRoleNode),
|
|
FromPort: i64(int64(r.From)),
|
|
ToPort: i64(int64(r.To)),
|
|
Protocol: s("udp"),
|
|
})
|
|
}
|
|
for _, r := range tcpRanges {
|
|
c.AddTask(&awstasks.SecurityGroupRule{
|
|
Name: s(fmt.Sprintf("node-to-master-tcp-%d-%d", r.From, r.To)),
|
|
Lifecycle: b.Lifecycle,
|
|
SecurityGroup: b.LinkToSecurityGroup(kops.InstanceGroupRoleMaster),
|
|
SourceGroup: b.LinkToSecurityGroup(kops.InstanceGroupRoleNode),
|
|
FromPort: i64(int64(r.From)),
|
|
ToPort: i64(int64(r.To)),
|
|
Protocol: s("tcp"),
|
|
})
|
|
}
|
|
for _, protocol := range protocols {
|
|
awsName := strconv.Itoa(int(protocol))
|
|
name := awsName
|
|
switch protocol {
|
|
case ProtocolIPIP:
|
|
name = "ipip"
|
|
default:
|
|
glog.Warningf("unknown protocol %q - naming by number", awsName)
|
|
}
|
|
|
|
c.AddTask(&awstasks.SecurityGroupRule{
|
|
Name: s("node-to-master-protocol-" + name),
|
|
Lifecycle: b.Lifecycle,
|
|
SecurityGroup: b.LinkToSecurityGroup(kops.InstanceGroupRoleMaster),
|
|
SourceGroup: b.LinkToSecurityGroup(kops.InstanceGroupRoleNode),
|
|
Protocol: s(awsName),
|
|
})
|
|
}
|
|
}
|
|
|
|
func (b *FirewallModelBuilder) buildMasterRules(c *fi.ModelBuilderContext) error {
|
|
name := "masters." + b.ClusterName()
|
|
|
|
{
|
|
t := &awstasks.SecurityGroup{
|
|
Name: s(name),
|
|
Lifecycle: b.Lifecycle,
|
|
VPC: b.LinkToVPC(),
|
|
Description: s("Security group for masters"),
|
|
RemoveExtraRules: []string{
|
|
"port=22", // SSH
|
|
"port=443", // k8s api
|
|
"port=4001", // etcd main (etcd events is 4002)
|
|
"port=4789", // VXLAN
|
|
"port=179", // Calico
|
|
|
|
// TODO: UDP vs TCP
|
|
// TODO: Protocol 4 for calico
|
|
},
|
|
}
|
|
c.AddTask(t)
|
|
}
|
|
|
|
// Allow full egress
|
|
{
|
|
t := &awstasks.SecurityGroupRule{
|
|
Name: s("master-egress"),
|
|
Lifecycle: b.Lifecycle,
|
|
SecurityGroup: b.LinkToSecurityGroup(kops.InstanceGroupRoleMaster),
|
|
Egress: fi.Bool(true),
|
|
CIDR: s("0.0.0.0/0"),
|
|
}
|
|
c.AddTask(t)
|
|
}
|
|
|
|
// Masters can talk to masters
|
|
{
|
|
t := &awstasks.SecurityGroupRule{
|
|
Name: s("all-master-to-master"),
|
|
Lifecycle: b.Lifecycle,
|
|
SecurityGroup: b.LinkToSecurityGroup(kops.InstanceGroupRoleMaster),
|
|
SourceGroup: b.LinkToSecurityGroup(kops.InstanceGroupRoleMaster),
|
|
}
|
|
c.AddTask(t)
|
|
}
|
|
|
|
// Masters can talk to nodes
|
|
{
|
|
t := &awstasks.SecurityGroupRule{
|
|
Name: s("all-master-to-node"),
|
|
Lifecycle: b.Lifecycle,
|
|
SecurityGroup: b.LinkToSecurityGroup(kops.InstanceGroupRoleNode),
|
|
SourceGroup: b.LinkToSecurityGroup(kops.InstanceGroupRoleMaster),
|
|
}
|
|
c.AddTask(t)
|
|
}
|
|
|
|
return nil
|
|
}
|