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enable kube-route to be run as daemonset, now just run kubectl create…
… -f kube-router-daemonset.yaml
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Murali Reddy
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Apr 26, 2017
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,5 @@ | ||
| FROM alpine | ||
| RUN apk add --no-cache iptables ipset | ||
| COPY kube-router / | ||
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| ENTRYPOINT ["/kube-router"] |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,9 +1,13 @@ | ||
| #all: push | ||
| all: | ||
| go build -o kube-router kube-router.go | ||
| all: dockerimg | ||
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| dockerimg: build | ||
| sudo docker build -t "cloudnativelabs/kube-router" . | ||
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| build: | ||
| go build --ldflags '-extldflags "-static"' -o kube-router kube-router.go | ||
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| clean: | ||
| rm -f kube-router | ||
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| run: | ||
| ./kube-router --kubeconfig=~/kubeconfig | ||
| ./kube-router --kubeconfig=/var/lib/kube-router/kubeconfig |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,44 @@ | ||
| apiVersion: extensions/v1beta1 | ||
| kind: DaemonSet | ||
| metadata: | ||
| name: kube-router | ||
| namespace: kube-system | ||
| labels: | ||
| app: kube-router | ||
| spec: | ||
| template: | ||
| metadata: | ||
| labels: | ||
| name: kube-router | ||
| spec: | ||
| hostNetwork: true | ||
| containers: | ||
| - name: kube-router | ||
| image: cloudnativelabs/kube-router | ||
| args: ["--run-router=false"] | ||
| securityContext: | ||
| privileged: true | ||
| imagePullPolicy: Always | ||
| env: | ||
| - name: NODE_NAME | ||
| valueFrom: | ||
| fieldRef: | ||
| fieldPath: spec.nodeName | ||
| volumeMounts: | ||
| - mountPath: /lib/modules | ||
| name: lib-modules | ||
| readOnly: true | ||
| - mountPath: /etc/cni/net.d/10-kuberouter.conf | ||
| name: cni-conf-dir | ||
| - mountPath: /var/lib/kube-router/kubeconfig | ||
| name: kubeconfig | ||
| volumes: | ||
| - name: lib-modules | ||
| hostPath: | ||
| path: /lib/modules | ||
| - name: cni-conf-dir | ||
| hostPath: | ||
| path: /etc/cni/net.d/10-kuberouter.conf | ||
| - name: kubeconfig | ||
| hostPath: | ||
| path: /var/lib/kube-router/kubeconfig |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,24 +1,60 @@ | ||
| package utils | ||
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| import ( | ||
| "encoding/json" | ||
| "fmt" | ||
| "io/ioutil" | ||
| "net" | ||
| "os" | ||
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| "github.com/containernetworking/cni/libcni" | ||
| "github.com/containernetworking/cni/plugins/ipam/host-local/backend/allocator" | ||
| metav1 "k8s.io/apimachinery/pkg/apis/meta/v1" | ||
| "k8s.io/client-go/kubernetes" | ||
| ) | ||
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| func GetPodCidrDetails(cniConfFilePath string) (string, int, error) { | ||
| func GetPodCidrFromCniSpec(cniConfFilePath string) (net.IPNet, error) { | ||
| netconfig, err := libcni.ConfFromFile(cniConfFilePath) | ||
| if err != nil { | ||
| return "", 0, fmt.Errorf("Failed to load CNI conf: %s", err.Error()) | ||
| return net.IPNet{}, fmt.Errorf("Failed to load CNI conf file: %s", err.Error()) | ||
| } | ||
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| var ipamConfig *allocator.IPAMConfig | ||
| ipamConfig, _, err = allocator.LoadIPAMConfig(netconfig.Bytes, "") | ||
| if err != nil { | ||
| return "", 0, fmt.Errorf("Failed to get IPAM details from the CNI conf file: %s", err.Error()) | ||
| return net.IPNet{}, fmt.Errorf("Failed to get IPAM details from the CNI conf file: %s", err.Error()) | ||
| } | ||
| return net.IPNet(ipamConfig.Subnet), nil | ||
| } | ||
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| func InsertPodCidrInCniSpec(cniConfFilePath string, cidr string) error { | ||
| file, err := ioutil.ReadFile(cniConfFilePath) | ||
| if err != nil { | ||
| return fmt.Errorf("Failed to load CNI conf file: %s", err.Error()) | ||
| } | ||
| config := make(map[string]interface{}) | ||
| err = json.Unmarshal(file, &config) | ||
| if err != nil { | ||
| return fmt.Errorf("Failed to parse JSON from CNI conf file: %s", err.Error()) | ||
| } | ||
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| config["ipam"].(map[string]interface{})["subnet"] = cidr | ||
| configJson, _ := json.Marshal(config) | ||
| err = ioutil.WriteFile(cniConfFilePath, configJson, 0644) | ||
| if err != nil { | ||
| return fmt.Errorf("Failed to insert subnet cidr into CNI conf file: %s", err.Error()) | ||
| } | ||
| return nil | ||
| } | ||
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| cidrlen, _ := ipamConfig.Subnet.Mask.Size() | ||
| return ipamConfig.Subnet.IP.String(), cidrlen, nil | ||
| func GetPodCidrFromNodeSpec(clientset *kubernetes.Clientset) (string, error) { | ||
| nodeHostName, err := os.Hostname() | ||
| if err != nil { | ||
| panic(err.Error()) | ||
| } | ||
| node, err := clientset.Core().Nodes().Get(nodeHostName, metav1.GetOptions{}) | ||
| if err != nil { | ||
| panic(err.Error()) | ||
| } | ||
| return node.Spec.PodCIDR, nil | ||
| } |