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authorBoaz Shuster <boaz.shuster.github@gmail.com>2021-11-07 13:21:25 +0200
committerBoaz Shuster <boaz.shuster.github@gmail.com>2021-11-07 16:33:38 +0200
commitf3fab1e17ce9a6eb68b84c887b120abeacedc78a (patch)
tree4f0182891c1dd134b3ce9cb3228d6377381f41e5 /libpod/kube.go
parentabbd6c167e8163a711680db80137a0731e06e564 (diff)
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podman-generate-kube - remove empty structs from YAML
[NO NEW TESTS NEEDED] Signed-off-by: Boaz Shuster <boaz.shuster.github@gmail.com>
Diffstat (limited to 'libpod/kube.go')
-rw-r--r--libpod/kube.go78
1 files changed, 76 insertions, 2 deletions
diff --git a/libpod/kube.go b/libpod/kube.go
index e0ed911af..850f2493c 100644
--- a/libpod/kube.go
+++ b/libpod/kube.go
@@ -167,9 +167,83 @@ func (v *Volume) GenerateForKube() *v1.PersistentVolumeClaim {
}
}
+// YAMLPodSpec represents the same k8s API core PodSpec struct with a small
+// change and that is having Containers as a pointer to YAMLContainer.
+// Because Go doesn't omit empty struct and we want to omit Status in YAML
+// if it's empty. Fixes: GH-11998
+type YAMLPodSpec struct {
+ v1.PodSpec
+ Containers []*YAMLContainer `json:"containers"`
+}
+
+// YAMLPod represents the same k8s API core Pod struct with a small
+// change and that is having Spec as a pointer to YAMLPodSpec and
+// Status as a pointer to k8s API core PodStatus.
+// Because Go doesn't omit empty struct and we want to omit Status in YAML
+// if it's empty. Fixes: GH-11998
+type YAMLPod struct {
+ v1.Pod
+ Spec *YAMLPodSpec `json:"spec,omitempty"`
+ Status *v1.PodStatus `json:"status,omitempty"`
+}
+
+// YAMLService represents the same k8s API core Service struct with a small
+// change and that is having Status as a pointer to k8s API core ServiceStatus.
+// Because Go doesn't omit empty struct and we want to omit Status in YAML
+// if it's empty. Fixes: GH-11998
+type YAMLService struct {
+ v1.Service
+ Status *v1.ServiceStatus `json:"status,omitempty"`
+}
+
+// YAMLContainer represents the same k8s API core Container struct with a small
+// change and that is having Resources as a pointer to k8s API core ResourceRequirements.
+// Because Go doesn't omit empty struct and we want to omit Status in YAML
+// if it's empty. Fixes: GH-11998
+type YAMLContainer struct {
+ v1.Container
+ Resources *v1.ResourceRequirements `json:"resources,omitempty"`
+}
+
+// ConvertV1PodToYAMLPod takes k8s API core Pod and returns a pointer to YAMLPod
+func ConvertV1PodToYAMLPod(pod *v1.Pod) *YAMLPod {
+ cs := []*YAMLContainer{}
+ for _, cc := range pod.Spec.Containers {
+ var res *v1.ResourceRequirements = nil
+ if len(cc.Resources.Limits) > 0 || len(cc.Resources.Requests) > 0 {
+ res = &cc.Resources
+ }
+ cs = append(cs, &YAMLContainer{Container: cc, Resources: res})
+ }
+ mpo := &YAMLPod{Pod: *pod}
+ mpo.Spec = &YAMLPodSpec{PodSpec: (*pod).Spec, Containers: cs}
+ for _, ctr := range pod.Spec.Containers {
+ if ctr.SecurityContext == nil || ctr.SecurityContext.SELinuxOptions == nil {
+ continue
+ }
+ selinuxOpts := ctr.SecurityContext.SELinuxOptions
+ if selinuxOpts.User == "" && selinuxOpts.Role == "" && selinuxOpts.Type == "" && selinuxOpts.Level == "" {
+ ctr.SecurityContext.SELinuxOptions = nil
+ }
+ }
+ dnsCfg := pod.Spec.DNSConfig
+ if dnsCfg != nil && (len(dnsCfg.Nameservers)+len(dnsCfg.Searches)+len(dnsCfg.Options) > 0) {
+ mpo.Spec.DNSConfig = dnsCfg
+ }
+ status := pod.Status
+ if status.Phase != "" || len(status.Conditions) > 0 ||
+ status.Message != "" || status.Reason != "" ||
+ status.NominatedNodeName != "" || status.HostIP != "" ||
+ status.PodIP != "" || status.StartTime != nil ||
+ len(status.InitContainerStatuses) > 0 || len(status.ContainerStatuses) > 0 || status.QOSClass != "" || len(status.EphemeralContainerStatuses) > 0 {
+ mpo.Status = &status
+ }
+ return mpo
+}
+
// GenerateKubeServiceFromV1Pod creates a v1 service object from a v1 pod object
-func GenerateKubeServiceFromV1Pod(pod *v1.Pod, servicePorts []v1.ServicePort) v1.Service {
- service := v1.Service{}
+func GenerateKubeServiceFromV1Pod(pod *v1.Pod, servicePorts []v1.ServicePort) YAMLService {
+ service := YAMLService{}
selector := make(map[string]string)
selector["app"] = pod.Labels["app"]
ports := servicePorts