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Merge pull request #13 from robscott/rs/containers
Adding Container Level Output, YAML Formatting, and Sorting
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,127 @@ | ||
| // Copyright 2019 Kube Capacity 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 capacity | ||
|
|
||
| import ( | ||
| "fmt" | ||
| "os" | ||
|
|
||
| "k8s.io/client-go/kubernetes" | ||
| metrics "k8s.io/metrics/pkg/client/clientset/versioned" | ||
|
|
||
| "github.com/robscott/kube-capacity/pkg/kube" | ||
| corev1 "k8s.io/api/core/v1" | ||
| metav1 "k8s.io/apimachinery/pkg/apis/meta/v1" | ||
| v1beta1 "k8s.io/metrics/pkg/apis/metrics/v1beta1" | ||
| ) | ||
|
|
||
| // FetchAndPrint gathers cluster resource data and outputs it | ||
| func FetchAndPrint(showContainers, showPods, showUtil bool, podLabels, nodeLabels, namespaceLabels, kubeContext, output, sortBy string) { | ||
| clientset, err := kube.NewClientSet(kubeContext) | ||
| if err != nil { | ||
| fmt.Printf("Error connecting to Kubernetes: %v\n", err) | ||
| os.Exit(1) | ||
| } | ||
|
|
||
| podList, nodeList := getPodsAndNodes(clientset, podLabels, nodeLabels, namespaceLabels) | ||
| pmList := &v1beta1.PodMetricsList{} | ||
| if showUtil { | ||
| mClientset, err := kube.NewMetricsClientSet(kubeContext) | ||
| if err != nil { | ||
| fmt.Printf("Error connecting to Metrics API: %v\n", err) | ||
| os.Exit(4) | ||
| } | ||
|
|
||
| pmList = getMetrics(mClientset) | ||
| } | ||
|
|
||
| cm := buildClusterMetric(podList, pmList, nodeList) | ||
| printList(&cm, showContainers, showPods, showUtil, output, sortBy) | ||
| } | ||
|
|
||
| func getPodsAndNodes(clientset kubernetes.Interface, podLabels, nodeLabels, namespaceLabels string) (*corev1.PodList, *corev1.NodeList) { | ||
| nodeList, err := clientset.CoreV1().Nodes().List(metav1.ListOptions{ | ||
| LabelSelector: nodeLabels, | ||
| }) | ||
| if err != nil { | ||
| fmt.Printf("Error listing Nodes: %v\n", err) | ||
| os.Exit(2) | ||
| } | ||
|
|
||
| podList, err := clientset.CoreV1().Pods("").List(metav1.ListOptions{ | ||
| LabelSelector: podLabels, | ||
| }) | ||
| if err != nil { | ||
| fmt.Printf("Error listing Pods: %v\n", err) | ||
| os.Exit(3) | ||
| } | ||
|
|
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| newPodItems := []corev1.Pod{} | ||
|
|
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| nodes := map[string]bool{} | ||
| for _, node := range nodeList.Items { | ||
| nodes[node.GetName()] = true | ||
| } | ||
|
|
||
| for _, pod := range podList.Items { | ||
| if !nodes[pod.Spec.NodeName] { | ||
| continue | ||
| } | ||
|
|
||
| newPodItems = append(newPodItems, pod) | ||
| } | ||
|
|
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| podList.Items = newPodItems | ||
|
|
||
| if namespaceLabels != "" { | ||
| namespaceList, err := clientset.CoreV1().Namespaces().List(metav1.ListOptions{ | ||
| LabelSelector: namespaceLabels, | ||
| }) | ||
| if err != nil { | ||
| fmt.Printf("Error listing Namespaces: %v\n", err) | ||
| os.Exit(3) | ||
| } | ||
|
|
||
| namespaces := map[string]bool{} | ||
| for _, ns := range namespaceList.Items { | ||
| namespaces[ns.GetName()] = true | ||
| } | ||
|
|
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| newPodItems := []corev1.Pod{} | ||
|
|
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| for _, pod := range podList.Items { | ||
| if !namespaces[pod.GetNamespace()] { | ||
| continue | ||
| } | ||
|
|
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| newPodItems = append(newPodItems, pod) | ||
| } | ||
|
|
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| podList.Items = newPodItems | ||
| } | ||
|
|
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| return podList, nodeList | ||
| } | ||
|
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| func getMetrics(mClientset *metrics.Clientset) *v1beta1.PodMetricsList { | ||
| pmList, err := mClientset.MetricsV1beta1().PodMetricses("").List(metav1.ListOptions{}) | ||
| if err != nil { | ||
| fmt.Printf("Error getting Pod Metrics: %v\n", err) | ||
| fmt.Println("For this to work, metrics-server needs to be running in your cluster") | ||
| os.Exit(6) | ||
| } | ||
|
|
||
| return pmList | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,119 @@ | ||
| // Copyright 2019 Kube Capacity 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 capacity | ||
|
|
||
| import ( | ||
| "testing" | ||
|
|
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| "github.com/stretchr/testify/assert" | ||
|
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| corev1 "k8s.io/api/core/v1" | ||
| metav1 "k8s.io/apimachinery/pkg/apis/meta/v1" | ||
|
|
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| "k8s.io/client-go/kubernetes/fake" | ||
| ) | ||
|
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| func TestGetPodsAndNodes(t *testing.T) { | ||
| clientset := fake.NewSimpleClientset( | ||
| node("mynode", map[string]string{"hello": "world"}), | ||
| node("mynode2", map[string]string{"hello": "world", "moon": "lol"}), | ||
| namespace("default", map[string]string{"app": "true"}), | ||
| namespace("kube-system", map[string]string{"system": "true"}), | ||
| namespace("other", map[string]string{"app": "true", "system": "true"}), | ||
| namespace("another", map[string]string{"hello": "world"}), | ||
| pod("mynode", "default", "mypod", map[string]string{"a": "test"}), | ||
| pod("mynode2", "kube-system", "mypod1", map[string]string{"b": "test"}), | ||
| pod("mynode", "other", "mypod2", map[string]string{"c": "test"}), | ||
| pod("mynode2", "other", "mypod3", map[string]string{"d": "test"}), | ||
| pod("mynode2", "default", "mypod4", map[string]string{"e": "test"}), | ||
| pod("mynode", "another", "mypod5", map[string]string{"f": "test"}), | ||
| pod("mynode", "default", "mypod6", map[string]string{"g": "test"}), | ||
| ) | ||
|
|
||
| podList, nodeList := getPodsAndNodes(clientset, "", "", "") | ||
| assert.Equal(t, []string{"mynode", "mynode2"}, listNodes(nodeList)) | ||
| assert.Equal(t, []string{ | ||
| "default/mypod", "kube-system/mypod1", "other/mypod2", "other/mypod3", "default/mypod4", | ||
| "another/mypod5", "default/mypod6", | ||
| }, listPods(podList)) | ||
|
|
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| podList, nodeList = getPodsAndNodes(clientset, "", "hello=world", "") | ||
| assert.Equal(t, []string{"mynode", "mynode2"}, listNodes(nodeList)) | ||
| assert.Equal(t, []string{ | ||
| "default/mypod", "kube-system/mypod1", "other/mypod2", "other/mypod3", "default/mypod4", | ||
| "another/mypod5", "default/mypod6", | ||
| }, listPods(podList)) | ||
|
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| podList, nodeList = getPodsAndNodes(clientset, "", "moon=lol", "") | ||
| assert.Equal(t, []string{"mynode2"}, listNodes(nodeList)) | ||
| assert.Equal(t, []string{ | ||
| "kube-system/mypod1", "other/mypod3", "default/mypod4", | ||
| }, listPods(podList)) | ||
|
|
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| podList, nodeList = getPodsAndNodes(clientset, "a=test", "", "") | ||
| assert.Equal(t, []string{"mynode", "mynode2"}, listNodes(nodeList)) | ||
| assert.Equal(t, []string{ | ||
| "default/mypod", | ||
| }, listPods(podList)) | ||
|
|
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| podList, nodeList = getPodsAndNodes(clientset, "a=test,b!=test", "", "app=true") | ||
| assert.Equal(t, []string{"mynode", "mynode2"}, listNodes(nodeList)) | ||
| assert.Equal(t, []string{ | ||
| "default/mypod", | ||
| }, listPods(podList)) | ||
| } | ||
|
|
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| func node(name string, labels map[string]string) *corev1.Node { | ||
| return &corev1.Node{ | ||
| TypeMeta: metav1.TypeMeta{ | ||
| Kind: "Node", | ||
| APIVersion: "v1", | ||
| }, | ||
| ObjectMeta: metav1.ObjectMeta{ | ||
| Name: name, | ||
| Labels: labels, | ||
| }, | ||
| } | ||
| } | ||
|
|
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| func namespace(name string, labels map[string]string) *corev1.Namespace { | ||
| return &corev1.Namespace{ | ||
| TypeMeta: metav1.TypeMeta{ | ||
| Kind: "Namespace", | ||
| APIVersion: "v1", | ||
| }, | ||
| ObjectMeta: metav1.ObjectMeta{ | ||
| Name: name, | ||
| Labels: labels, | ||
| }, | ||
| } | ||
| } | ||
|
|
||
| func pod(node, namespace, name string, labels map[string]string) *corev1.Pod { | ||
| return &corev1.Pod{ | ||
| TypeMeta: metav1.TypeMeta{ | ||
| Kind: "Pod", | ||
| APIVersion: "v1", | ||
| }, | ||
| ObjectMeta: metav1.ObjectMeta{ | ||
| Name: name, | ||
| Namespace: namespace, | ||
| Labels: labels, | ||
| }, | ||
| Spec: corev1.PodSpec{ | ||
| NodeName: node, | ||
| }, | ||
| } | ||
| } |
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