forked from projectcalico/felix
/
namespace.go
133 lines (122 loc) · 3.76 KB
/
namespace.go
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// Copyright (c) 2017 Tigera, Inc. All rights reserved.
//
// 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 main
import (
"encoding/json"
"fmt"
"strings"
log "github.com/Sirupsen/logrus"
"github.com/projectcalico/felix/k8sfv/internalversion"
"k8s.io/client-go/kubernetes"
"k8s.io/client-go/pkg/api"
"k8s.io/client-go/pkg/api/v1"
"k8s.io/client-go/pkg/apis/extensions"
metav1 "k8s.io/client-go/pkg/apis/meta/v1"
)
var nsPrefixNum = 0
func getNamespacePrefix() (nsPrefix string) {
nsPrefixNum++
nsPrefix = fmt.Sprintf("ns%d-", nsPrefixNum)
return
}
type namespacePolicy struct {
Ingress struct {
Isolation string `json:"isolation"`
} `json:"ingress"`
}
func createNamespace(clientset *kubernetes.Clientset, name string, labels map[string]string) {
createNamespaceInt(clientset, name, labels, "")
}
func createIsolatedNamespace(clientset *kubernetes.Clientset, name string, labels map[string]string) {
createNamespaceInt(clientset, name, labels, "DefaultDeny")
}
func createNamespaceInt(
clientset *kubernetes.Clientset,
name string,
labels map[string]string,
isolation string,
) {
ns_in := &v1.Namespace{
ObjectMeta: v1.ObjectMeta{
Name: name,
Labels: labels,
},
}
if isolation != "" {
np := namespacePolicy{}
np.Ingress.Isolation = isolation
annotation, _ := json.Marshal(np)
ns_in.ObjectMeta.Annotations = map[string]string{
"net.beta.kubernetes.io/network-policy": string(annotation),
}
}
log.WithField("ns_in", ns_in).Debug("Namespace defined")
ns_out, err := clientset.Namespaces().Create(ns_in)
if err != nil {
panic(err)
}
log.WithField("ns_out", ns_out).Debug("Created namespace")
}
func cleanupAllNamespaces(clientset *kubernetes.Clientset, nsPrefix string) {
log.Info("Cleaning up all namespaces...")
nsList, err := clientset.Namespaces().List(v1.ListOptions{})
if err != nil {
panic(err)
}
log.WithField("count", len(nsList.Items)).Info("Namespaces present")
for _, ns := range nsList.Items {
if strings.HasPrefix(ns.ObjectMeta.Name, nsPrefix) {
err = clientset.Namespaces().Delete(ns.ObjectMeta.Name, deleteImmediately)
if err != nil {
panic(err)
}
} else {
log.WithField("name", ns.ObjectMeta.Name).Debug("Namespace skipped")
}
}
log.Info("Cleaned up all namespaces")
}
// Create a NetworkPolicy, for pods in the specified namespace, that allows ingress from other pods
// in the same namespace.
func createNetworkPolicy(clientset *kubernetes.Clientset, namespace string) {
npInterface := internalversion.NewNetworkPolicies(clientset.ExtensionsV1beta1Client, namespace)
np := extensions.NetworkPolicy{
ObjectMeta: api.ObjectMeta{
Namespace: namespace,
Name: "test-syncer-basic-net-policy",
},
Spec: extensions.NetworkPolicySpec{
PodSelector: metav1.LabelSelector{
MatchLabels: map[string]string{"calico/k8s_ns": namespace},
},
Ingress: []extensions.NetworkPolicyIngressRule{
extensions.NetworkPolicyIngressRule{
Ports: []extensions.NetworkPolicyPort{
extensions.NetworkPolicyPort{},
},
From: []extensions.NetworkPolicyPeer{
extensions.NetworkPolicyPeer{
PodSelector: &metav1.LabelSelector{
MatchLabels: map[string]string{
"calico/k8s_ns": namespace,
},
},
},
},
},
},
},
}
npInterface.Create(&np)
}