-
Notifications
You must be signed in to change notification settings - Fork 12
Commit
This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository.
add new actionner calico:networkpolicy (#173)
Signed-off-by: Thomas Labarussias <issif+github@gadz.org>
- Loading branch information
Showing
10 changed files
with
409 additions
and
147 deletions.
There are no files selected for viewing
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,183 @@ | ||
| package networkpolicy | ||
|
|
||
| import ( | ||
| "context" | ||
| "encoding/json" | ||
| "fmt" | ||
| "strconv" | ||
| "strings" | ||
|
|
||
| networkingv3 "github.com/projectcalico/api/pkg/apis/projectcalico/v3" | ||
| "github.com/projectcalico/api/pkg/lib/numorstring" | ||
| errorsv1 "k8s.io/apimachinery/pkg/api/errors" | ||
| metav1 "k8s.io/apimachinery/pkg/apis/meta/v1" | ||
|
|
||
| calico "github.com/Falco-Talon/falco-talon/internal/calico/client" | ||
|
|
||
| "github.com/Falco-Talon/falco-talon/internal/events" | ||
| kubernetes "github.com/Falco-Talon/falco-talon/internal/kubernetes/client" | ||
| "github.com/Falco-Talon/falco-talon/internal/rules" | ||
| "github.com/Falco-Talon/falco-talon/utils" | ||
| ) | ||
|
|
||
| func Action(_ *rules.Action, event *events.Event) (utils.LogLine, error) { | ||
| podName := event.GetPodName() | ||
| namespace := event.GetNamespaceName() | ||
|
|
||
| objects := map[string]string{ | ||
| "pod": podName, | ||
| "namespace": namespace, | ||
| } | ||
| k8sClient := kubernetes.GetClient() | ||
| calicoClient := calico.GetClient() | ||
|
|
||
| pod, err := k8sClient.GetPod(podName, namespace) | ||
| if err != nil { | ||
| return utils.LogLine{ | ||
| Objects: objects, | ||
| Error: err.Error(), | ||
| Status: "failure", | ||
| }, | ||
| err | ||
| } | ||
|
|
||
| var owner string | ||
| labels := make(map[string]string) | ||
|
|
||
| if len(pod.OwnerReferences) != 0 { | ||
| switch pod.OwnerReferences[0].Kind { | ||
| case "DaemonSet": | ||
| u, err2 := k8sClient.GetDaemonsetFromPod(pod) | ||
| if err2 != nil { | ||
| return utils.LogLine{ | ||
| Objects: objects, | ||
| Error: err2.Error(), | ||
| Status: "failure", | ||
| }, | ||
| err2 | ||
| } | ||
| owner = u.ObjectMeta.Name | ||
| labels = u.Spec.Selector.MatchLabels | ||
| case "StatefulSet": | ||
| u, err2 := k8sClient.GetStatefulsetFromPod(pod) | ||
| if err2 != nil { | ||
| return utils.LogLine{ | ||
| Objects: objects, | ||
| Error: err2.Error(), | ||
| Status: "failure", | ||
| }, | ||
| err2 | ||
| } | ||
| owner = u.ObjectMeta.Name | ||
| labels = u.Spec.Selector.MatchLabels | ||
| case "ReplicaSet": | ||
| u, err2 := k8sClient.GetReplicasetFromPod(pod) | ||
| if err2 != nil { | ||
| return utils.LogLine{ | ||
| Objects: objects, | ||
| Error: err2.Error(), | ||
| Status: "failure", | ||
| }, | ||
| err2 | ||
| } | ||
| owner = u.ObjectMeta.Name | ||
| labels = u.Spec.Selector.MatchLabels | ||
| } | ||
| } else { | ||
| owner = pod.ObjectMeta.Name | ||
| labels = pod.ObjectMeta.Labels | ||
| } | ||
|
|
||
| if owner == "" || len(labels) == 0 { | ||
| err3 := fmt.Errorf("can't find the owner and/or labels for the pod '%v' in the namespace '%v'", podName, namespace) | ||
| return utils.LogLine{ | ||
| Objects: objects, | ||
| Error: err3.Error(), | ||
| Status: "failure", | ||
| }, | ||
| err3 | ||
| } | ||
|
|
||
| delete(labels, "pod-template-hash") | ||
|
|
||
| payload := networkingv3.NetworkPolicy{ | ||
| ObjectMeta: metav1.ObjectMeta{ | ||
| Name: owner, | ||
| Namespace: namespace, | ||
| Labels: labels, | ||
| }, | ||
| Spec: networkingv3.NetworkPolicySpec{ | ||
| Types: []networkingv3.PolicyType{networkingv3.PolicyTypeEgress}, | ||
| }, | ||
| } | ||
|
|
||
| var selector string | ||
| for i, j := range labels { | ||
| selector += fmt.Sprintf(`%v == "%v" &&`, i, j) | ||
| } | ||
|
|
||
| payload.Spec.Selector = strings.TrimSuffix(selector, " &&") | ||
|
|
||
| r, err := createEgressRule(event) | ||
| if err != nil { | ||
| return utils.LogLine{ | ||
| Objects: objects, | ||
| Error: err.Error(), | ||
| Status: "failure", | ||
| }, | ||
| err | ||
| } | ||
|
|
||
| if r != nil { | ||
| payload.Spec.Egress = []networkingv3.Rule{*r} | ||
| } | ||
|
|
||
| j, _ := json.Marshal(payload) | ||
| fmt.Println(string(j)) | ||
|
|
||
| var output string | ||
| _, err = calicoClient.ProjectcalicoV3().NetworkPolicies(namespace).List(context.Background(), metav1.ListOptions{}) | ||
| if errorsv1.IsNotFound(err) { | ||
| _, err = calicoClient.ProjectcalicoV3().NetworkPolicies(namespace).Create(context.Background(), &payload, metav1.CreateOptions{}) | ||
| output = fmt.Sprintf("the networkpolicy '%v' in the namespace '%v' has been created", owner, namespace) | ||
| } else { | ||
| _, err = calicoClient.ProjectcalicoV3().NetworkPolicies(namespace).Update(context.Background(), &payload, metav1.UpdateOptions{}) | ||
| output = fmt.Sprintf("the networkpolicy '%v' in the namespace '%v' has been updated", owner, namespace) | ||
| } | ||
| if err != nil { | ||
| return utils.LogLine{ | ||
| Objects: objects, | ||
| Error: err.Error(), | ||
| Status: "failure", | ||
| }, | ||
| err | ||
| } | ||
| objects["NetworkPolicy"] = owner | ||
| return utils.LogLine{ | ||
| Objects: objects, | ||
| Output: output, | ||
| Status: "success", | ||
| }, | ||
| nil | ||
| } | ||
|
|
||
| func createEgressRule(event *events.Event) (*networkingv3.Rule, error) { | ||
| port, err := strconv.ParseUint(event.GetRemotePort(), 0, 16) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| r := networkingv3.Rule{ | ||
| Action: "Deny", | ||
| Destination: networkingv3.EntityRule{ | ||
| Nets: []string{event.GetRemoteIP()}, | ||
| Ports: []numorstring.Port{ | ||
| { | ||
| MinPort: uint16(port), | ||
| MaxPort: uint16(port), | ||
| }, | ||
| }, | ||
| }, | ||
| } | ||
|
|
||
| return &r, nil | ||
| } |
Oops, something went wrong.