在kubernetes client-go中，无法创建没有复制控制器的部署。

huangapple
go评论108阅读模式
英文:

unable to create a deployment without replication controller in kubernetes client-go

问题

问题是我无法创建一个没有创建副本控制器的部署规范。我不想使用副本控制器，因为我的应用程序始终只使用一个 Pod，并且我想将重启策略设置为 never，以防止任何终止的容器尝试重新启动。

上面是我想要实现和部署的目标 YAML 文件，我想使用 Kubernetes 的 client-go 进行部署，但是 client-go 目前只提供了带有副本控制器的部署。

有什么建议吗？非常感谢！

英文:

The issue is I cannot create a deployment spec without creating replication controller along with it.I would not like to use replication controller because my app always use only one pod and I would like to set restart policy to never to prevent any terminated container tries to restart.

  1. apiVersion: v1
  2. kind: Pod
  3. metadata:
  4.   name: two-containers
  5. spec:
  6. restartPolicy: Never
  8.   volumes:
  9.   - name: shared-data
  10.     emptyDir: {}
  12.   containers:
  14.   - name: nginx-container
  15.     image: nginx
  16.     volumeMounts:
  17.     - name: shared-data
  18.       mountPath: /usr/share/nginx/html
  20.   - name: debian-container
  21.     image: debian
  22.     volumeMounts:
  23.     - name: shared-data
  24.       mountPath: /pod-data
  25.     command: ["/bin/sh"]
  26.     args: ["-c", "echo Hello from the debian container > /pod-data/index.html"]

Above is the target yaml file, which I would like to implement and deploy with kubernetes client-go, however client-go currently only provides deployment with replication controller.

  1. // Define Deployments spec.
  2.     deploySpec := &v1beta1.Deployment{
  3. 	    TypeMeta: unversioned.TypeMeta{
  4. 		    Kind:       "Deployment",
  5. 		    APIVersion: "extensions/v1beta1",
  6. 	},
  7. 	ObjectMeta: v1.ObjectMeta{
  8. 		Name: "binary-search",
  9. 	},
  10. 	Spec: v1beta1.DeploymentSpec{
  11. 		Replicas: int32p(1),
  12. 		Template: v1.PodTemplateSpec{
  13. 			ObjectMeta: v1.ObjectMeta{
  14. 				Name:   appName,
  15. 				Labels: map[string]string{"app": appName},
  16. 			},
  17. 			Spec: v1.PodSpec{
  18. 				Containers: []v1.Container{
  19. 					v1.Container{
  20. 						Name:  "nginx-container",
  21. 						Image: "nginx",
  22. 						VolumeMounts: []v1.VolumeMount{
  23. 							v1.VolumeMount{
  24. 								MountPath: "/usr/share/nginx/html",
  25. 								Name:      "shared-data",
  26. 							},
  27. 						},
  28. 					},
  29. 					v1.Container{
  30. 						Name:  "debian-container",
  31. 						Image: "debian",
  32. 						VolumeMounts: []v1.VolumeMount{
  33. 							v1.VolumeMount{
  34. 								MountPath: "/pod-data",
  35. 								Name:      "shared-data",
  36. 							},
  37. 						},
  38. 						Command: []string{
  39. 							"/bin/sh",
  40. 						},
  41. 						Args: []string{
  42. 							"-c",
  43. 							"echo Hello from the debian container > /pod-data/index1.html",
  44. 						},
  45. 					},
  46. 				},
  47. 				RestartPolicy: v1.RestartPolicyAlways,
  48. 				DNSPolicy:     v1.DNSClusterFirst,
  49. 				Volumes: []v1.Volume{
  50. 					v1.Volume{
  51. 						Name: "shared-data",
  52. 						VolumeSource: v1.VolumeSource{
  53. 							EmptyDir: &v1.EmptyDirVolumeSource{},
  54. 						},
  55. 					},
  56. 				},
  57. 			},
  58. 		},
  59. 	},
  60. 	}
  64. // Implement deployment update-or-create semantics.
  65. deploy := c.Extensions().Deployments(namespace)
  66. 	_, err := deploy.Update(deploySpec)

Any suggestion? Many thanks in advance!

答案1

得分: 0

如果您不想重新启动服务，可以直接使用Pod。无需使用Deployment，因为只有在您想要自动重新启动Pod和更新发布时才有意义。

代码应该如下所示（未经测试）：

  1. podSpec := v1.PodSpec{
  2.     Containers: []v1.Container{
  3.         v1.Container{
  4.             Name:  "nginx-container",
  5.             Image: "nginx",
  6.             VolumeMounts: []v1.VolumeMount{
  7.                 v1.VolumeMount{
  8.                     MountPath: "/usr/share/nginx/html",
  9.                     Name:      "shared-data",
  10.                 },
  11.             },
  12.         },
  13.         v1.Container{
  14.             Name:  "debian-container",
  15.             Image: "debian",
  16.             VolumeMounts: []v1.VolumeMount{
  17.                 v1.VolumeMount{
  18.                     MountPath: "/pod-data",
  19.                     Name:      "shared-data",
  20.                 },
  21.             },
  22.             Command: []string{
  23.                 "/bin/sh",
  24.             },
  25.             Args: []string{
  26.                 "-c",
  27.                 "echo Hello from the debian container > /pod-data/index1.html",
  28.             },
  29.         },
  30.     },
  31.     RestartPolicy: v1.RestartPolicyAlways,
  32.     DNSPolicy:     v1.DNSClusterFirst,
  33.     Volumes: []v1.Volume{
  34.         v1.Volume{
  35.             Name: "shared-data",
  36.             VolumeSource: v1.VolumeSource{
  37.                 EmptyDir: &v1.EmptyDirVolumeSource{},
  38.             },
  39.         },
  40.     },
  41. }
  43. // 实现部署的更新或创建语义。
  44. deploy := c.Core().PodsGetter(namespace)
  45. _, err := deploy.Update(podSpec)
英文:

If you don't want the service to be restarted, then you can just use the Pod directly. There is no need to use a Deployment, since these only make sense, if you want to have automatic Pod restarts and roll-outs of updates.

The code would look somehow like this (not tested):

  1. podSpec := v1.PodSpec{
  2. 	Containers: []v1.Container{
  3. 		v1.Container{
  4. 			Name:  "nginx-container",
  5. 			Image: "nginx",
  6. 			VolumeMounts: []v1.VolumeMount{
  7. 				v1.VolumeMount{
  8. 					MountPath: "/usr/share/nginx/html",
  9. 					Name:      "shared-data",
  10. 				},
  11. 			},
  12. 		},
  13. 		v1.Container{
  14. 			Name:  "debian-container",
  15. 			Image: "debian",
  16. 			VolumeMounts: []v1.VolumeMount{
  17. 				v1.VolumeMount{
  18. 					MountPath: "/pod-data",
  19. 					Name:      "shared-data",
  20. 				},
  21. 			},
  22. 			Command: []string{
  23. 				"/bin/sh",
  24. 			},
  25. 			Args: []string{
  26. 				"-c",
  27. 				"echo Hello from the debian container > /pod-data/index1.html",
  28. 			},
  29. 		},
  30. 	},
  31. 	RestartPolicy: v1.RestartPolicyAlways,
  32. 	DNSPolicy:     v1.DNSClusterFirst,
  33. 	Volumes: []v1.Volume{
  34. 		v1.Volume{
  35. 			Name: "shared-data",
  36. 			VolumeSource: v1.VolumeSource{
  37. 				EmptyDir: &v1.EmptyDirVolumeSource{},
  38. 			},
  39. 		},
  40. 	},
  41. }
  43. // Implement deployment update-or-create semantics.
  44. deploy := c.Core().PodsGetter(namespace)
  45. _, err := deploy.Update(podSpec)

huangapple
  • 本文由 发表于 2017年3月7日 11:44:45
  • 转载请务必保留本文链接：https://go.coder-hub.com/42639801.html
  • go
  • kubernetes
  • kubernetes-go-client
匿名

发表评论

匿名网友

:?: :razz: :sad: :evil: :!: :smile: :oops: :grin: :eek: :shock: :???: :cool: :lol: :mad: :twisted: :roll: :wink: :idea: :arrow: :neutral: :cry: :mrgreen:

确定