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addons/dns: changing probes for SRV record type 

Signed-off-by: André Martins <aanm90@gmail.com>
pull/6/head
André Martins 2017-08-26 01:40:21 +02:00
parent 70960a5ed7
commit 3e4b9fad6a
9 changed files with 104 additions and 28 deletions
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10
cluster/addons/dns/kube-dns.yaml.base
View File

@ -94,7 +94,7 @@ spec:
optional: true
containers:
- name: kubedns
image: gcr.io/google_containers/k8s-dns-kube-dns-amd64:1.14.5
image: gcr.io/google_containers/k8s-dns-kube-dns-amd64:1.14.6
resources:
# TODO: Set memory limits when we've profiled the container for large
# clusters, then set request = limit to keep this container in
@ -145,7 +145,7 @@ spec:
- name: kube-dns-config
mountPath: /kube-dns-config
- name: dnsmasq
image: gcr.io/google_containers/k8s-dns-dnsmasq-nanny-amd64:1.14.5
image: gcr.io/google_containers/k8s-dns-dnsmasq-nanny-amd64:1.14.6
livenessProbe:
httpGet:
path: /healthcheck/dnsmasq
@ -184,7 +184,7 @@ spec:
- name: kube-dns-config
mountPath: /etc/k8s/dns/dnsmasq-nanny
- name: sidecar
image: gcr.io/google_containers/k8s-dns-sidecar-amd64:1.14.5
image: gcr.io/google_containers/k8s-dns-sidecar-amd64:1.14.6
livenessProbe:
httpGet:
path: /metrics
@ -197,8 +197,8 @@ spec:
args:
- --v=2
- --logtostderr
- --probe=kubedns,127.0.0.1:10053,kubernetes.default.svc.__PILLAR__DNS__DOMAIN__,5,A
- --probe=dnsmasq,127.0.0.1:53,kubernetes.default.svc.__PILLAR__DNS__DOMAIN__,5,A
- --probe=kubedns,127.0.0.1:10053,kubernetes.default.svc.__PILLAR__DNS__DOMAIN__,5,SRV
- --probe=dnsmasq,127.0.0.1:53,kubernetes.default.svc.__PILLAR__DNS__DOMAIN__,5,SRV
ports:
- containerPort: 10054
name: metrics

10
cluster/addons/dns/kube-dns.yaml.in
View File

@ -94,7 +94,7 @@ spec:
optional: true
containers:
- name: kubedns
image: gcr.io/google_containers/k8s-dns-kube-dns-amd64:1.14.5
image: gcr.io/google_containers/k8s-dns-kube-dns-amd64:1.14.6
resources:
# TODO: Set memory limits when we've profiled the container for large
# clusters, then set request = limit to keep this container in
@ -145,7 +145,7 @@ spec:
- name: kube-dns-config
mountPath: /kube-dns-config
- name: dnsmasq
image: gcr.io/google_containers/k8s-dns-dnsmasq-nanny-amd64:1.14.5
image: gcr.io/google_containers/k8s-dns-dnsmasq-nanny-amd64:1.14.6
livenessProbe:
httpGet:
path: /healthcheck/dnsmasq
@ -184,7 +184,7 @@ spec:
- name: kube-dns-config
mountPath: /etc/k8s/dns/dnsmasq-nanny
- name: sidecar
image: gcr.io/google_containers/k8s-dns-sidecar-amd64:1.14.5
image: gcr.io/google_containers/k8s-dns-sidecar-amd64:1.14.6
livenessProbe:
httpGet:
path: /metrics
@ -197,8 +197,8 @@ spec:
args:
- --v=2
- --logtostderr
- --probe=kubedns,127.0.0.1:10053,kubernetes.default.svc.{{ pillar['dns_domain'] }},5,A
- --probe=dnsmasq,127.0.0.1:53,kubernetes.default.svc.{{ pillar['dns_domain'] }},5,A
- --probe=kubedns,127.0.0.1:10053,kubernetes.default.svc.{{ pillar['dns_domain'] }},5,SRV
- --probe=dnsmasq,127.0.0.1:53,kubernetes.default.svc.{{ pillar['dns_domain'] }},5,SRV
ports:
- containerPort: 10054
name: metrics

10
cluster/addons/dns/kube-dns.yaml.sed
View File

@ -94,7 +94,7 @@ spec:
optional: true
containers:
- name: kubedns
image: gcr.io/google_containers/k8s-dns-kube-dns-amd64:1.14.5
image: gcr.io/google_containers/k8s-dns-kube-dns-amd64:1.14.6
resources:
# TODO: Set memory limits when we've profiled the container for large
# clusters, then set request = limit to keep this container in
@ -145,7 +145,7 @@ spec:
- name: kube-dns-config
mountPath: /kube-dns-config
- name: dnsmasq
image: gcr.io/google_containers/k8s-dns-dnsmasq-nanny-amd64:1.14.5
image: gcr.io/google_containers/k8s-dns-dnsmasq-nanny-amd64:1.14.6
livenessProbe:
httpGet:
path: /healthcheck/dnsmasq
@ -184,7 +184,7 @@ spec:
- name: kube-dns-config
mountPath: /etc/k8s/dns/dnsmasq-nanny
- name: sidecar
image: gcr.io/google_containers/k8s-dns-sidecar-amd64:1.14.5
image: gcr.io/google_containers/k8s-dns-sidecar-amd64:1.14.6
livenessProbe:
httpGet:
path: /metrics
@ -197,8 +197,8 @@ spec:
args:
- --v=2
- --logtostderr
- --probe=kubedns,127.0.0.1:10053,kubernetes.default.svc.$DNS_DOMAIN,5,A
- --probe=dnsmasq,127.0.0.1:53,kubernetes.default.svc.$DNS_DOMAIN,5,A
- --probe=kubedns,127.0.0.1:10053,kubernetes.default.svc.$DNS_DOMAIN,5,SRV
- --probe=dnsmasq,127.0.0.1:53,kubernetes.default.svc.$DNS_DOMAIN,5,SRV
ports:
- containerPort: 10054
name: metrics

3
cmd/kubeadm/app/phases/addons/dns/dns.go
View File

@ -53,12 +53,13 @@ func EnsureDNSAddon(cfg *kubeadmapi.MasterConfiguration, client clientset.Interf
// Get the YAML manifest conditionally based on the k8s version
kubeDNSDeploymentBytes := GetKubeDNSManifest(k8sVersion)
dnsDeploymentBytes, err := kubeadmutil.ParseTemplate(kubeDNSDeploymentBytes, struct{ ImageRepository, Arch, Version, DNSDomain, MasterTaintKey string }{
dnsDeploymentBytes, err := kubeadmutil.ParseTemplate(kubeDNSDeploymentBytes, struct{ ImageRepository, Arch, Version, DNSDomain, DNSProbeType, MasterTaintKey string }{
ImageRepository: cfg.ImageRepository,
Arch: runtime.GOARCH,
// Get the kube-dns version conditionally based on the k8s version
Version: GetKubeDNSVersion(k8sVersion),
DNSDomain: cfg.Networking.DNSDomain,
DNSProbeType: GetKubeDNSProbeType(k8sVersion),
MasterTaintKey: kubeadmconstants.LabelNodeRoleMaster,
})
if err != nil {

5
cmd/kubeadm/app/phases/addons/dns/dns_test.go
View File

@ -90,12 +90,13 @@ func TestCompileManifests(t *testing.T) {
expected bool
}{
{
manifest: v170AndAboveKubeDNSDeployment,
data: struct{ ImageRepository, Arch, Version, DNSDomain, MasterTaintKey string }{
manifest: v180AndAboveKubeDNSDeployment,
data: struct{ ImageRepository, Arch, Version, DNSDomain, DNSProbeType, MasterTaintKey string }{
ImageRepository: "foo",
Arch: "foo",
Version: "foo",
DNSDomain: "foo",
DNSProbeType: "foo",
MasterTaintKey: "foo",
},
expected: true,

8
cmd/kubeadm/app/phases/addons/dns/manifests.go
View File

@ -17,8 +17,8 @@ limitations under the License.
package dns
const (
// v170AndAboveKubeDNSDeployment is the kube-dns Deployment manifest for the kube-dns manifest for v1.7+
v170AndAboveKubeDNSDeployment = `
// v180AndAboveKubeDNSDeployment is the kube-dns Deployment manifest for the kube-dns manifest for v1.7+
v180AndAboveKubeDNSDeployment = `
apiVersion: apps/v1beta2
kind: Deployment
metadata:
@ -156,8 +156,8 @@ spec:
args:
- --v=2
- --logtostderr
- --probe=kubedns,127.0.0.1:10053,kubernetes.default.svc.{{ .DNSDomain }},5,A
- --probe=dnsmasq,127.0.0.1:53,kubernetes.default.svc.{{ .DNSDomain }},5,A
- --probe=kubedns,127.0.0.1:10053,kubernetes.default.svc.{{ .DNSDomain }},5,{{ .DNSProbeType }}
- --probe=dnsmasq,127.0.0.1:53,kubernetes.default.svc.{{ .DNSDomain }},5,{{ .DNSProbeType }}
ports:
- containerPort: 10054
name: metrics

29
cmd/kubeadm/app/phases/addons/dns/versions.go
View File

@ -21,20 +21,39 @@ import (
)
const (
kubeDNSv170AndAboveVersion = "1.14.5"
kubeDNSv180AndAboveVersion = "1.14.5"
kubeDNSv190AndAboveVersion = "1.14.6"
kubeDNSProbeSRV = "SRV"
kubeDNSProbeA = "A"
)
// GetKubeDNSVersion returns the right kube-dns version for a specific k8s version
func GetKubeDNSVersion(kubeVersion *version.Version) string {
// v1.7.0+ uses 1.14.5, just return that here
// v1.8.0+ uses 1.14.5
// v1.9.0+ uses 1.14.6
// In the future when the kube-dns version is bumped at HEAD; add conditional logic to return the right versions
// Also, the version might be bumped for different k8s releases on the same branch
return kubeDNSv170AndAboveVersion
if kubeVersion.Major() == 1 && kubeVersion.Minor() >= 9 {
return kubeDNSv190AndAboveVersion
}
return kubeDNSv180AndAboveVersion
}
// GetKubeDNSProbeType returns the right kube-dns probe for a specific k8s version
func GetKubeDNSProbeType(kubeVersion *version.Version) string {
// v1.8.0+ uses type A, just return that here
// In the future when the kube-dns version is bumped at HEAD; add conditional logic to return the right versions
// Also, the version might be bumped for different k8s releases on the same branch
if kubeVersion.Major() == 1 && kubeVersion.Minor() >= 9 {
return kubeDNSProbeSRV
}
return kubeDNSProbeA
}
// GetKubeDNSManifest returns the right kube-dns YAML manifest for a specific k8s version
func GetKubeDNSManifest(kubeVersion *version.Version) string {
// v1.7.0+ has only one known YAML manifest spec, just return that here
// v1.8.0+ has only one known YAML manifest spec, just return that here
// In the future when the kube-dns version is bumped at HEAD; add conditional logic to return the right manifest
return v170AndAboveKubeDNSDeployment
return v180AndAboveKubeDNSDeployment
}

55
cmd/kubeadm/app/phases/addons/dns/versions_test.go
View File

@ -50,6 +50,10 @@ func TestGetKubeDNSVersion(t *testing.T) {
k8sVersion: "v1.8.0",
expected: "1.14.5",
},
{
k8sVersion: "v1.9.0",
expected: "1.14.6",
},
}
for _, rt := range tests {
@ -68,3 +72,54 @@ func TestGetKubeDNSVersion(t *testing.T) {
}
}
}
func TestGetKubeDNSProbeType(t *testing.T) {
var tests = []struct {
k8sVersion, expected string
}{
{
k8sVersion: "v1.7.0",
expected: "A",
},
{
k8sVersion: "v1.7.1",
expected: "A",
},
{
k8sVersion: "v1.7.2",
expected: "A",
},
{
k8sVersion: "v1.7.3",
expected: "A",
},
{
k8sVersion: "v1.8.0-alpha.2",
expected: "A",
},
{
k8sVersion: "v1.8.0",
expected: "A",
},
{
k8sVersion: "v1.9.0",
expected: "SRV",
},
}
for _, rt := range tests {
k8sVersion, err := version.ParseSemantic(rt.k8sVersion)
if err != nil {
t.Fatalf("couldn't parse kubernetes version %q: %v", rt.k8sVersion, err)
}
actualDNSProbeType := GetKubeDNSProbeType(k8sVersion)
if actualDNSProbeType != rt.expected {
t.Errorf(
"failed GetKubeDNSProbeType:\n\texpected: %s\n\t actual: %s",
rt.expected,
actualDNSProbeType,
)
}
}
}

2
cmd/kubeadm/app/phases/upgrade/compute_test.go
View File

@ -399,7 +399,7 @@ func TestGetAvailableUpgrades(t *testing.T) {
After: ClusterState{
KubeVersion: "v1.9.0-alpha.1",
KubeadmVersion: "v1.9.0-alpha.1",
DNSVersion: "1.14.5",
DNSVersion: "1.14.6",
},
},
},