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k8s调度资源管理开发设计与实现

在上一章，我们在做pod管理的开发后，对我们得接口进行了优化，后续我们对其他资源的操作，都采用接口的方式进行开发。本文我们就使用接口，开发k8s集群各个调度资源的管理。

1. Deployment的功能开发

我们直接将pod目录进行复制改成deployment，然后对代码稍加修改即可。

路由：
routers/deployment/deployment.go

package deployment

import (
    "github.com/gin-gonic/gin"
    "jingtian/krm-backend/controllers/deployment"
)

// 实现创建deployment的接口
func create(deploymentGroup *gin.RouterGroup) {
    //具体逻辑写到控制器controller里面
    deploymentGroup.POST("/create", deployment.Create)
}

// 实现更新deployment的接口
func update(deploymentGroup *gin.RouterGroup) {
    //具体逻辑写到控制器controller里面
    deploymentGroup.POST("/update", deployment.Update)
}

// 删除deployment
func deletedeployment(deploymentGroup *gin.RouterGroup) {
    deploymentGroup.GET("/delete", deployment.Delete)
}

// 批量删除deployment
func deleteList(deploymentGroup *gin.RouterGroup) {
    deploymentGroup.POST("/deleteList", deployment.DeleteList)
}

// 获取deployment信息
func get(deploymentGroup *gin.RouterGroup) {
    deploymentGroup.GET("/get", deployment.Get)
}

// 列出所有deployment
func list(deploymentGroup *gin.RouterGroup) {
    deploymentGroup.GET("/list", deployment.List)
}

// RegisterSubRouter 认证子路由
func RegisterSubRouter(g *gin.RouterGroup) {
    //配置登录功能路由策略
    deploymentGroup := g.Group("/deployment")
    create(deploymentGroup)
    update(deploymentGroup)
    deletedeployment(deploymentGroup)
    get(deploymentGroup)
    list(deploymentGroup)
    deleteList(deploymentGroup)

}

控制器

封装接口之后，我们再写代码就变得非常简单了，比如deployment/update.go

package deployment

import (
    "github.com/gin-gonic/gin"
    "github.com/littlefun91/kubeutils/kubeutils"
    "jingtian/krm-backend/controllers"
    "jingtian/krm-backend/utils/logs"
    appsv1 "k8s.io/api/apps/v1"
)

func Update(c *gin.Context) {
    logs.Debug(nil, "更新deployment")
    //更新，只需要把create代码复制过来，将info中的create方法改成update方法即可
    var deployment appsv1.Deployment
    var info controllers.Info
    info.Item = &deployment
    kubeconfig := controllers.NewInfo(c, &info, "deployment更新成功")
    // 改为接口形式的创建
    var kubeUtilser kubeutils.KubeUtilser
    instance := kubeutils.NewDeployment(kubeconfig, &deployment)
    // 把实例复制给kubeUtilser
    kubeUtilser = instance
    // 使用kubeUtilser创建资源
    info.Update(c, kubeUtilser)
}

测试deployment功能
我们在postman中将pod文件夹，复制一份，改名为deployment

将请求路径改为deployment

创建deployment：
我们使用kubectl create deployment --dry-run=client的方式生成创建deployment的json文件

kubectl create deployment myweb --image="web:v4" --dry-run=client -ojson

我们将json文件复制到postman，执行创建deployment操作

{
    "kind": "Deployment",
    "apiVersion": "apps/v1",
    "metadata": {
        "name": "myweb",
        "creationTimestamp": null,
        "labels": {
            "app": "myweb"
        }
    },
    "spec": {
        "replicas": 1,
        "selector": {
            "matchLabels": {
                "app": "myweb"
            }
        },
        "template": {
            "metadata": {
                "creationTimestamp": null,
                "labels": {
                    "app": "myweb"
                }
            },
            "spec": {
                "containers": [
                    {
                        "name": "web",
                        "image": "web:v4",
                        "resources": {}
                    }
                ]
            }
        },
        "strategy": {}
    },
    "status": {}
}

创建成功

在k8s集群查看，创建成功

更新deployment:

我们更新下deployment的annotations

{
    "clusterId":"cluster01",
    "namespace":"jingtian",
    "item": {
    "kind": "Deployment",
    "apiVersion": "apps/v1",
    "metadata": {
        "name": "myweb",
        "creationTimestamp": null,
        "annotations":{
            "kubeasy.com":"true"
        },
        "labels": {
            "app": "myweb"
        }
    },
    "spec": {
        "replicas": 1,
        "selector": {
            "matchLabels": {
                "app": "myweb"
            }
        },
        "template": {
            "metadata": {
                "creationTimestamp": null,
                "labels": {
                    "app": "myweb"
                }
            },
            "spec": {
                "containers": [
                    {
                        "name": "web",
                        "image": "web:v4",
                        "resources": {}
                    }
                ]
            }
        },
        "strategy": {}
    },
    "status": {}
}
}

集群中查看，更新成功

查看deployment列表：
再创建个deployment

postman发送查询请求

查询deployment详情：

删除deployment功能：

2. Statefulset的功能开发

与deployment管理的开发大致类似，都是先创建路由，然后开发控制器。
routers/statefulset.go

package statefulset

import (
    "github.com/gin-gonic/gin"
    "jingtian/krm-backend/controllers/statefulset"
)

// 实现创建statefulset的接口
func create(statefulsetGroup *gin.RouterGroup) {
    //具体逻辑写到控制器controller里面
    statefulsetGroup.POST("/create", statefulset.Create)
}

// 实现更新statefulset的接口
func update(statefulsetGroup *gin.RouterGroup) {
    //具体逻辑写到控制器controller里面
    statefulsetGroup.POST("/update", statefulset.Update)
}

// 删除statefulset
func deletestatefulset(statefulsetGroup *gin.RouterGroup) {
    statefulsetGroup.GET("/delete", statefulset.Delete)
}

// 批量删除statefulset
func deleteList(statefulsetGroup *gin.RouterGroup) {
    statefulsetGroup.POST("/deleteList", statefulset.DeleteList)
}

// 获取statefulset信息
func get(statefulsetGroup *gin.RouterGroup) {
    statefulsetGroup.GET("/get", statefulset.Get)
}

// 列出所有statefulset
func list(statefulsetGroup *gin.RouterGroup) {
    statefulsetGroup.GET("/list", statefulset.List)
}

// RegisterSubRouter 认证子路由
func RegisterSubRouter(g *gin.RouterGroup) {
    //配置登录功能路由策略
    statefulsetGroup := g.Group("/statefulset")
    create(statefulsetGroup)
    update(statefulsetGroup)
    deletestatefulset(statefulsetGroup)
    get(statefulsetGroup)
    list(statefulsetGroup)
    deleteList(statefulsetGroup)

}

注册总路由

控制器

创建statefulset和deployment有些不一样。
创建statefulset的时候，需要指定servicename。

需要看一下是否要自动创建headless service。这个功能我们在前后端交互时，我们再做

测试管理statefulset的可用性

创建sts
创建statefulset的时候，不能再用–dry-run=client生成json文件。因为kubectl create命令行没有生成statefulset的命令

我们需要通过yaml方式生成statefulset，然后导出json文件

{
    "apiVersion": "apps/v1",
    "kind": "StatefulSet",
    "metadata": {

        "name": "myweb",
        "namespace": "jingtian",

    },
    "spec": {
        "podManagementPolicy": "OrderedReady",
        "replicas": 1,
        "revisionHistoryLimit": 10,
        "selector": {
            "matchLabels": {
                "app": "myweb"
            }
        },
        "template": {
            "metadata": {
                "creationTimestamp": null,
                "labels": {
                    "app": "myweb"
                }
            },
            "spec": {
                "containers": [
                    {
                        "image": "web:v4",
                        "imagePullPolicy": "IfNotPresent",
                        "name": "myweb"
                    }
                ],

                "nodeSelector": {
                    "stateless": "yes"
                },
                "restartPolicy": "Always",
                "schedulerName": "default-scheduler",
                "securityContext": {},
                "terminationGracePeriodSeconds": 30
            }
        },
        "updateStrategy": {
            "rollingUpdate": {
                "partition": 0
            },
            "type": "RollingUpdate"
        }
    }
}

k8s集群查看，statefunset创建成功

更新statefulset:
我们将updateStrategy下的partition改为2

集群中查看，修改成功

查看statefulset列表：

获取statefulset详情：

删除statefulset:

3. Daemonset的功能开发

类似的，复制，修改

先添加路由
routers/daemonset.go

package daemonset

import (
    "github.com/gin-gonic/gin"
    "jingtian/krm-backend/controllers/daemonset"
)

// 实现创建daemonset的接口
func create(daemonsetGroup *gin.RouterGroup) {
    //具体逻辑写到控制器controller里面
    daemonsetGroup.POST("/create", daemonset.Create)
}

// 实现更新daemonset的接口
func update(daemonsetGroup *gin.RouterGroup) {
    //具体逻辑写到控制器controller里面
    daemonsetGroup.POST("/update", daemonset.Update)
}

// 删除daemonset
func deletedaemonset(daemonsetGroup *gin.RouterGroup) {
    daemonsetGroup.GET("/delete", daemonset.Delete)
}

// 批量删除daemonset
func deleteList(daemonsetGroup *gin.RouterGroup) {
    daemonsetGroup.POST("/deleteList", daemonset.DeleteList)
}

// 获取daemonset信息
func get(daemonsetGroup *gin.RouterGroup) {
    daemonsetGroup.GET("/get", daemonset.Get)
}

// 列出所有daemonset
func list(daemonsetGroup *gin.RouterGroup) {
    daemonsetGroup.GET("/list", daemonset.List)
}

// RegisterSubRouter 认证子路由
func RegisterSubRouter(g *gin.RouterGroup) {
    //配置登录功能路由策略
    daemonsetGroup := g.Group("/daemonset")
    create(daemonsetGroup)
    update(daemonsetGroup)
    deletedaemonset(daemonsetGroup)
    get(daemonsetGroup)
    list(daemonsetGroup)
    deleteList(daemonsetGroup)

}

注册到总路由

控制器
controllers/daemonset

创建daemonset

{
    "clusterId":"cluster01",
    "namespace":"jingtian",
    "item": {
    "apiVersion": "apps/v1",
    "kind": "DaemonSet",
    "metadata": {
        "labels": {
            "name": "node-exporter"
        },
        "name": "node-exporter",
        "namespace": "jingtian"

    },
    "spec": {
        "revisionHistoryLimit": 10,
        "selector": {
            "matchLabels": {
                "name": "node-exporter"
            }
        },
        "template": {
            "metadata": {
                "labels": {
                    "name": "node-exporter"
                }
            },
            "spec": {
                "containers": [
                    {
                        "image": "web:v4",
                        "imagePullPolicy": "IfNotPresent",
                        "name":"webdaemonset"

                    }
                ],
                "restartPolicy": "Always",
                "terminationGracePeriodSeconds": 30,
                "tolerations": [
                    {
                        "effect": "NoSchedule",
                        "key": "k8s-master",
                        "operator": "Equal",
                        "value": "null"
                    },
                    {
                        "effect": "NoExecute",
                        "key": "node-role.kubernetes.io/etcd",
                        "operator": "Equal",
                        "value": "true"
                    },
                    {
                        "effect": "NoSchedule",
                        "key": "nexus",
                        "operator": "Equal",
                        "value": "null"
                    },
                    {
                        "effect": "NoSchedule",
                        "key": "node-role.kubernetes.io/control-plane",
                        "operator": "Exists"
                    }
                ]

  
            }
        },
        "updateStrategy": {
            "rollingUpdate": {
                "maxUnavailable": 1
            },
            "type": "RollingUpdate"
        }
    }
}


}

创建成功

更新daemonset：
我们将最大不可用改为2

集群查看，更新成功

查看daemonset列表

查看daemonset详情

删除daemonset

4. cronjob功能开发

路由routers/cronjob.go

package cronjob

import (
    "github.com/gin-gonic/gin"
    "jingtian/krm-backend/controllers/cronjob"
)

// 实现创建cronjob的接口
func create(cronjobGroup *gin.RouterGroup) {
    //具体逻辑写到控制器controller里面
    cronjobGroup.POST("/create", cronjob.Create)
}

// 实现更新cronjob的接口
func update(cronjobGroup *gin.RouterGroup) {
    //具体逻辑写到控制器controller里面
    cronjobGroup.POST("/update", cronjob.Update)
}

// 删除cronjob
func deletecronjob(cronjobGroup *gin.RouterGroup) {
    cronjobGroup.GET("/delete", cronjob.Delete)
}

// 批量删除cronjob
func deleteList(cronjobGroup *gin.RouterGroup) {
    cronjobGroup.POST("/deleteList", cronjob.DeleteList)
}

// 获取cronjob信息
func get(cronjobGroup *gin.RouterGroup) {
    cronjobGroup.GET("/get", cronjob.Get)
}

// 列出所有cronjob
func list(cronjobGroup *gin.RouterGroup) {
    cronjobGroup.GET("/list", cronjob.List)
}

// RegisterSubRouter 认证子路由
func RegisterSubRouter(g *gin.RouterGroup) {
    //配置登录功能路由策略
    cronjobGroup := g.Group("/cronjob")
    create(cronjobGroup)
    update(cronjobGroup)
    deletecronjob(cronjobGroup)
    get(cronjobGroup)
    list(cronjobGroup)
    deleteList(cronjobGroup)

}

注册总路由

控制器

创建cronjob:
我们通过kubectl create -h 查看哪些资源可以通过kubectl create命令行来创建

我们发现，cronjob是可以的，因此我们可以通过kubectl create --dry-run=client 来导出生成cronjob的json文件
我们可以通过 kubectl create cronjob -h 来查看通过命令行来创建cronjob的示例

kubectl create cronjob my-job --image=alphinewithlocaltime:v1 --schedule="*/1 * * * *" --dry-run=client -ojson

{
    "clusterId":"cluster01",
    "namespace":"jingtian",
    "item": {
    "kind": "CronJob",
    "apiVersion": "batch/v1",
    "metadata": {
        "name": "my-job"
    },
    "spec": {
        "schedule": "*/1 * * * *",
        "jobTemplate": {
            "metadata": {
                "name": "my-job"
            },
            "spec": {
                "template": {
                    "spec": {
                        "containers": [
                            {
                                "name": "my-job",
                                "image": "alphinewithlocaltime:v1",
                                "resources": {}
                            }
                        ],
                        "restartPolicy": "OnFailure"
                    }
                }
            }
        }
    },
    "status": {}
}


}

集群查看，创建成功

修改cronjob:
我们将调度周期改为每五分钟调度一次

修改成功

查看cronjob列表

查询cronjob详情

删除cronjob

删除成功

5. Replicaset功能实现

我们在执行deployment回滚的时候，需要查询有哪些replicaset。因此，我们也需要对rs的操作管理进行开发实现。

我们一般不需要去更新或删除rs。只需要查询即可，因此需要有个查询列表和查询详情的功能

一样的，我们需要路由和控制器
routers/replicaset.go

package replicaset

import (
    "github.com/gin-gonic/gin"
    "jingtian/krm-backend/controllers/replicaset"
)

// 获取replicaset信息
func get(replicasetGroup *gin.RouterGroup) {
    replicasetGroup.GET("/get", replicaset.Get)
}

// 列出所有replicaset
func list(replicasetGroup *gin.RouterGroup) {
    replicasetGroup.GET("/list", replicaset.List)
}

// RegisterSubRouter 认证子路由
func RegisterSubRouter(g *gin.RouterGroup) {
    //配置登录功能路由策略
    replicasetGroup := g.Group("/replicaset")
    get(replicasetGroup)
    list(replicasetGroup)

}

注册到总路由

控制器

我们先看下jingtian命名空间下的rs

查询rs列表

查询rs详情

6. 实现节点管理

节点的功能和rs也是比较类似的，它也是去实现查询节点状态，节点详情。更新一些节点的标签，污点等操作。

路由
routers/node.go

package node

import (
    "github.com/gin-gonic/gin"
    "jingtian/krm-backend/controllers/node"
)

// 实现更新node的接口
func update(nodeGroup *gin.RouterGroup) {
    //具体逻辑写到控制器controller里面
    nodeGroup.POST("/update", node.Update)
}

// 获取node信息
func get(nodeGroup *gin.RouterGroup) {
    nodeGroup.GET("/get", node.Get)
}

// 列出所有node
func list(nodeGroup *gin.RouterGroup) {
    nodeGroup.GET("/list", node.List)
}

// RegisterSubRouter 认证子路由
func RegisterSubRouter(g *gin.RouterGroup) {
    //配置登录功能路由策略
    nodeGroup := g.Group("/node")
    update(nodeGroup)
    get(nodeGroup)
    list(nodeGroup)

}

注册到总路由

node控制器

查看node列表

查询node详情

更新node标签或者注解
我们将查询节点详情里面item里面的json拿出来，其他的status等全部删除，对标签或注解稍作修改。
添加一个注解

{
    "clusterId":"cluster01",
    "name":"node01",
    "item": {
            "kind": "Node",
            "apiVersion": "v1",
            "metadata": {
                "name": "node01",
                "uid": "96bf47a9-15ac-4e09-929c-754ed361c890",
                "resourceVersion": "2139695",
                "creationTimestamp": "2024-06-20T08:33:12Z",
                "labels": {
                    "beta.kubernetes.io/arch": "amd64",
                    "beta.kubernetes.io/os": "linux",
                    "kubernetes.io/arch": "amd64",
                    "kubernetes.io/hostname": "node01",
                    "kubernetes.io/os": "linux",
                    "node-role.kubernetes.io/worker": "true"
                },
                "annotations": {
                    "kubeadm.alpha.kubernetes.io/cri-socket": "unix:///var/run/containerd/containerd.sock",
                    "node.alpha.kubernetes.io/ttl": "0",
                    "projectcalico.org/IPv4Address": "10.10.0.11/24",
                    "projectcalico.org/IPv4IPIPTunnelAddr": "172.29.55.0",
                    "volumes.kubernetes.io/controller-managed-attach-detach": "true",
                    "jingtian":"true"

                }
            },
            "spec": {
                "podCIDR": "172.16.1.0/24",
                "podCIDRs": [
                    "172.16.1.0/24"
                ]
            }
        }
}

集群查看，添加成功

添加标签

集群查看，添加成功

当然也可以删除注解，删除标签，添加删除污点等操作，感兴趣的朋友试试吧！