forked from kubernetes/kubernetes
-
Notifications
You must be signed in to change notification settings - Fork 0
/
firewall.go
182 lines (155 loc) · 8.79 KB
/
firewall.go
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
/*
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 e2e
import (
"fmt"
"k8s.io/apimachinery/pkg/util/sets"
"k8s.io/kubernetes/pkg/api/v1"
"k8s.io/kubernetes/pkg/client/clientset_generated/clientset"
"k8s.io/kubernetes/pkg/cloudprovider"
gcecloud "k8s.io/kubernetes/pkg/cloudprovider/providers/gce"
"k8s.io/kubernetes/pkg/master/ports"
"k8s.io/kubernetes/test/e2e/framework"
. "github.com/onsi/ginkgo"
. "github.com/onsi/gomega"
)
var _ = framework.KubeDescribe("Firewall rule", func() {
var firewall_test_name = "firewall-test"
f := framework.NewDefaultFramework(firewall_test_name)
var cs clientset.Interface
var cloudConfig framework.CloudConfig
var gceCloud *gcecloud.GCECloud
BeforeEach(func() {
framework.SkipUnlessProviderIs("gce")
cs = f.ClientSet
cloudConfig = framework.TestContext.CloudConfig
gceCloud = cloudConfig.Provider.(*gcecloud.GCECloud)
})
// This test takes around 6 minutes to run
It("[Slow] [Serial] should create valid firewall rules for LoadBalancer type service", func() {
ns := f.Namespace.Name
// This source ranges is just used to examine we have exact same things on LB firewall rules
firewallTestSourceRanges := []string{"0.0.0.0/1", "128.0.0.0/1"}
serviceName := "firewall-test-loadbalancer"
By("Getting cluster ID")
clusterID, err := framework.GetClusterID(cs)
Expect(err).NotTo(HaveOccurred())
framework.Logf("Got cluster ID: %v", clusterID)
jig := framework.NewServiceTestJig(cs, serviceName)
nodesNames := jig.GetNodesNames(framework.MaxNodesForEndpointsTests)
if len(nodesNames) <= 0 {
framework.Failf("Expect at least 1 node, got: %v", nodesNames)
}
nodesSet := sets.NewString(nodesNames...)
By("Creating a LoadBalancer type service with ExternalTrafficPolicy=Global")
svc := jig.CreateLoadBalancerService(ns, serviceName, framework.LoadBalancerCreateTimeoutDefault, func(svc *v1.Service) {
svc.Spec.Ports = []v1.ServicePort{{Protocol: "TCP", Port: framework.FirewallTestHttpPort}}
svc.Spec.LoadBalancerSourceRanges = firewallTestSourceRanges
})
defer func() {
jig.UpdateServiceOrFail(svc.Namespace, svc.Name, func(svc *v1.Service) {
svc.Spec.Type = v1.ServiceTypeNodePort
svc.Spec.LoadBalancerSourceRanges = nil
})
Expect(cs.Core().Services(svc.Namespace).Delete(svc.Name, nil)).NotTo(HaveOccurred())
By("Waiting for the local traffic health check firewall rule to be deleted")
localHCFwName := framework.MakeHealthCheckFirewallNameForLBService(clusterID, cloudprovider.GetLoadBalancerName(svc), false)
_, err := framework.WaitForFirewallRule(gceCloud, localHCFwName, false, framework.LoadBalancerCleanupTimeout)
Expect(err).NotTo(HaveOccurred())
}()
svcExternalIP := svc.Status.LoadBalancer.Ingress[0].IP
By("Checking if service's firewall rule is correct")
nodeTags := framework.GetInstanceTags(cloudConfig, nodesNames[0])
lbFw := framework.ConstructFirewallForLBService(svc, nodeTags.Items)
fw, err := gceCloud.GetFirewall(lbFw.Name)
Expect(err).NotTo(HaveOccurred())
Expect(framework.VerifyFirewallRule(fw, lbFw, cloudConfig.Network, false)).NotTo(HaveOccurred())
By("Checking if service's nodes health check firewall rule is correct")
nodesHCFw := framework.ConstructHealthCheckFirewallForLBService(clusterID, svc, nodeTags.Items, true)
fw, err = gceCloud.GetFirewall(nodesHCFw.Name)
Expect(err).NotTo(HaveOccurred())
Expect(framework.VerifyFirewallRule(fw, nodesHCFw, cloudConfig.Network, false)).NotTo(HaveOccurred())
// OnlyLocal service is needed to examine which exact nodes the requests are being forwarded to by the Load Balancer on GCE
By("Updating LoadBalancer service to ExternalTrafficPolicy=Local")
svc = jig.UpdateServiceOrFail(svc.Namespace, svc.Name, func(svc *v1.Service) {
svc.Spec.ExternalTrafficPolicy = v1.ServiceExternalTrafficPolicyTypeLocal
})
By("Waiting for the nodes health check firewall rule to be deleted")
_, err = framework.WaitForFirewallRule(gceCloud, nodesHCFw.Name, false, framework.LoadBalancerCleanupTimeout)
Expect(err).NotTo(HaveOccurred())
By("Waiting for the correct local traffic health check firewall rule to be created")
localHCFw := framework.ConstructHealthCheckFirewallForLBService(clusterID, svc, nodeTags.Items, false)
fw, err = framework.WaitForFirewallRule(gceCloud, localHCFw.Name, true, framework.LoadBalancerCreateTimeoutDefault)
Expect(err).NotTo(HaveOccurred())
Expect(framework.VerifyFirewallRule(fw, localHCFw, cloudConfig.Network, false)).NotTo(HaveOccurred())
By(fmt.Sprintf("Creating netexec pods on at most %v nodes", framework.MaxNodesForEndpointsTests))
for i, nodeName := range nodesNames {
podName := fmt.Sprintf("netexec%v", i)
jig.LaunchNetexecPodOnNode(f, nodeName, podName, framework.FirewallTestHttpPort, framework.FirewallTestUdpPort, true)
defer func() {
framework.Logf("Cleaning up the netexec pod: %v", podName)
Expect(cs.Core().Pods(ns).Delete(podName, nil)).NotTo(HaveOccurred())
}()
}
// Send requests from outside of the cluster because internal traffic is whitelisted
By("Accessing the external service ip from outside, all non-master nodes should be reached")
Expect(framework.TestHitNodesFromOutside(svcExternalIP, framework.FirewallTestHttpPort, framework.FirewallTimeoutDefault, nodesSet)).NotTo(HaveOccurred())
// Check if there are overlapping tags on the firewall that extend beyond just the vms in our cluster
// by removing the tag on one vm and make sure it doesn't get any traffic. This is an imperfect
// simulation, we really want to check that traffic doesn't reach a vm outside the GKE cluster, but
// that's much harder to do in the current e2e framework.
By(fmt.Sprintf("Removing tags from one of the nodes: %v", nodesNames[0]))
nodesSet.Delete(nodesNames[0])
removedTags := framework.SetInstanceTags(cloudConfig, nodesNames[0], []string{})
defer func() {
By("Adding tags back to the node and wait till the traffic is recovered")
nodesSet.Insert(nodesNames[0])
framework.SetInstanceTags(cloudConfig, nodesNames[0], removedTags)
// Make sure traffic is recovered before exit
Expect(framework.TestHitNodesFromOutside(svcExternalIP, framework.FirewallTestHttpPort, framework.FirewallTimeoutDefault, nodesSet)).NotTo(HaveOccurred())
}()
By("Accessing serivce through the external ip and examine got no response from the node without tags")
Expect(framework.TestHitNodesFromOutsideWithCount(svcExternalIP, framework.FirewallTestHttpPort, framework.FirewallTimeoutDefault, nodesSet, 15)).NotTo(HaveOccurred())
})
It("should have correct firewall rules for e2e cluster", func() {
By("Gathering firewall related information")
masterTags := framework.GetInstanceTags(cloudConfig, cloudConfig.MasterName)
Expect(len(masterTags.Items)).Should(Equal(1))
nodes := framework.GetReadySchedulableNodesOrDie(cs)
if len(nodes.Items) <= 0 {
framework.Failf("Expect at least 1 node, got: %v", len(nodes.Items))
}
nodeTags := framework.GetInstanceTags(cloudConfig, nodes.Items[0].Name)
Expect(len(nodeTags.Items)).Should(Equal(1))
By("Checking if e2e firewall rules are correct")
for _, expFw := range framework.GetE2eFirewalls(cloudConfig.MasterName, masterTags.Items[0], nodeTags.Items[0], cloudConfig.Network) {
fw, err := gceCloud.GetFirewall(expFw.Name)
Expect(err).NotTo(HaveOccurred())
Expect(framework.VerifyFirewallRule(fw, expFw, cloudConfig.Network, false)).NotTo(HaveOccurred())
}
By("Checking well known ports on master and nodes are not exposed externally")
nodeAddrs := framework.NodeAddresses(nodes, v1.NodeExternalIP)
Expect(len(nodeAddrs)).NotTo(BeZero())
masterAddr := framework.GetMasterAddress(cs)
flag, _ := framework.TestNotReachableHTTPTimeout(masterAddr, ports.ControllerManagerPort, framework.FirewallTestTcpTimeout)
Expect(flag).To(BeTrue())
flag, _ = framework.TestNotReachableHTTPTimeout(masterAddr, ports.SchedulerPort, framework.FirewallTestTcpTimeout)
Expect(flag).To(BeTrue())
flag, _ = framework.TestNotReachableHTTPTimeout(nodeAddrs[0], ports.KubeletPort, framework.FirewallTestTcpTimeout)
Expect(flag).To(BeTrue())
flag, _ = framework.TestNotReachableHTTPTimeout(nodeAddrs[0], ports.KubeletReadOnlyPort, framework.FirewallTestTcpTimeout)
Expect(flag).To(BeTrue())
flag, _ = framework.TestNotReachableHTTPTimeout(nodeAddrs[0], ports.ProxyStatusPort, framework.FirewallTestTcpTimeout)
Expect(flag).To(BeTrue())
})
})