为MongoDB资源配置集群拓扑

本页内容

先决条件

步骤

您可以在Kubernetes中通过定义来配置您的MongoDB资源的部署拓扑NodeAffinity和来配置您的MongoDB资源的部署拓扑PodAffinity

. NodeAffinity和PodAffinity指定在您的集群中部署MongoDB自定义资源的位置。来配置您的MongoDB资源的部署拓扑您可以通过将

应用于节点亲和性来实现节点亲和性，通过将节点标签应用于您的特定节点。来配置您的MongoDB资源的部署拓扑在您的MongoDB 自定义资源定义中定义具有相应标签的 labelSelector 字段和集群。当您应用节点标签以及匹配的 labelSelector 值时，来配置您的MongoDB资源的部署拓扑只在您指定的节点上部署特定的MongoDB 自定义资源定义。来配置您的MongoDB资源的部署拓扑在异构节点组中部署MongoDB资源时，实现节点亲和性规则非常有用，因为它允许您将特定资源部署到特定的节点类型。

同样，您可以通过应用标签来实现Pod亲和性，将标签应用于您集群中运行的Pod，并将这些标签值与MongoDB的labelSelector值相匹配，这些值定义在您的MongoDB CustomResourceDefinition中。来配置您的MongoDB资源的部署拓扑当您应用标签并匹配labelSelector值时，MongoDB自定义资源管理的Pod将与具有匹配标签的Pod一起放置。通过放置Pod，您可以提高系统性能并减少经常通信的Pod之间的延迟。您还可以定义Pod反亲和性规则，允许您指定不应放置在一起的Pod。

对于独立和副本集部署，您可以将这些亲和性规则应用到spec.podSpec 是您 MongoDB 的自定义资源定义的一部分。对于分片集群部署，您可以将这些亲和规则应用于 MongoDB 的 spec.configSrvPodSpec、spec.shardPodSpec 和 spec.mongosPodSpec 部分自定义资源定义。

在分片集群部署的情况下，您必须将MonogDB资源，如 mongos、分片和配置服务器，部署在与MongoDB资源相同的命名空间中。然而，在同一个命名空间内，您可以配置 nodeAffinity 和 podAffinity，用于 mongos、分片和配置服务器资源类型在 ShardedCluster 自定义资源定义。

先决条件

为了配置MongoDB部署的部署拓扑，您必须通过MongoDB Kubernetes Operator部署一个MongoDB副本集，并对Kubernetes Operator应用标签。来配置您的MongoDB资源的部署拓扑将与在MongoDB 自定义资源定义中定义的 labelSelectors 对齐的资源。

一个运维管理器实例或一个云管理组织。
MongoDB企业版Kubernetes操作器。
Kubernetes操作器ConfigMap。
Kubernetes操作器的凭证或配置不同的密钥存储工具。
应用于以下资源的标签来配置您的MongoDB资源的部署拓扑将与在MongoDB 自定义资源定义中定义的 labelSelectors 对齐的资源。

步骤

更新你的 MongoDB CRD 清单。

如以下示例所示，在您的 MongoDB 分片集群定义中填充 podTemplate.affinity 部分

1 ---
2 apiVersion: mongodb.com/v1
3 kind: MongoDB
4 metadata:
5   name: my-sharded-cluster
6 spec:
7   shardCount: 2
8   mongodsPerShardCount: 3
9   mongosCount: 2
10   configServerCount: 3
11   version: 6.0.0
12   service: my-service
13 
14   opsManager:
15     configMapRef:
16       name: my-project
17   credentials: my-credentials
18   type: ShardedCluster
19 
20   persistent: true
21   configSrvPodSpec:
22     podTemplate:
23       spec:
24         affinity:
25           podAffinity:
26             requiredDuringSchedulingIgnoredDuringExecution:
27               - labelSelector:
28                   matchExpressions:
29                     - key: security
30                       operator: In
31                       values:
32                         - S1
33                 topologyKey: failure-domain.beta.kubernetes.io/zone
34           nodeAffinity:
35             requiredDuringSchedulingIgnoredDuringExecution:
36               nodeSelectorTerms:
37                 - matchExpressions:
38                     - key: kubernetes.io/e2e-az-name
39                       operator: In
40                       values:
41                         - e2e-az1
42                         - e2e-az2
43           podAntiAffinity:
44             requiredDuringSchedulingIgnoredDuringExecution:
45             - podAffinityTerm:
46                 topologyKey: nodeId
47   mongosPodSpec:
48     podTemplate:
49       spec:
50         affinity:
51           podAffinity:
52             requiredDuringSchedulingIgnoredDuringExecution:
53               - labelSelector:
54                   matchExpressions:
55                     - key: security
56                       operator: In
57                       values:
58                         - S1
59                 topologyKey: failure-domain.beta.kubernetes.io/zone
60           nodeAffinity:
61             requiredDuringSchedulingIgnoredDuringExecution:
62               nodeSelectorTerms:
63                 - matchExpressions:
64                     - key: kubernetes.io/e2e-az-name
65                       operator: In
66                       values:
67                         - e2e-az1
68                         - e2e-az2
69           podAntiAffinity:
70             requiredDuringSchedulingIgnoredDuringExecution:
71             - podAffinityTerm:
72                 topologyKey: nodeId
73   shardPodSpec:
74     podTemplate:
75       spec:
76         affinity:
77           podAffinity:
78             requiredDuringSchedulingIgnoredDuringExecution:
79               - labelSelector:
80                   matchExpressions:
81                     - key: security
82                       operator: In
83                       values:
84                         - S1
85                 topologyKey: failure-domain.beta.kubernetes.io/zone
86           nodeAffinity:
87             requiredDuringSchedulingIgnoredDuringExecution:
88               nodeSelectorTerms:
89                 - matchExpressions:
90                     - key: kubernetes.io/e2e-az-name
91                       operator: In
92                       values:
93                         - e2e-az1
94                         - e2e-az2
95           podAntiAffinity:
96             requiredDuringSchedulingIgnoredDuringExecution:
97             - podAffinityTerm:
98                 topologyKey: nodeId
99 ...

应用您的更改。

kubectl apply -f mongodb-crd.yaml

后退

配置备份

前进

配置存储选项

1	---
2	apiVersion: mongodb.com/v1
3	kind: MongoDB
4	metadata:
5	name: my-sharded-cluster
6	spec:
7	shardCount: 2
8	mongodsPerShardCount: 3
9	mongosCount: 2
10	configServerCount: 3
11	version: 6.0.0
12	service: my-service
13
14	opsManager:
15	configMapRef:
16	name: my-project
17	credentials: my-credentials
18	type: ShardedCluster
19
20	persistent: true
21	configSrvPodSpec:
22	podTemplate:
23	spec:
24	affinity:
25	podAffinity:
26	requiredDuringSchedulingIgnoredDuringExecution:
27	- labelSelector:
28	matchExpressions:
29	- key: security
30	operator: In
31	values:
32	- S1
33	topologyKey: failure-domain.beta.kubernetes.io/zone
34	nodeAffinity:
35	requiredDuringSchedulingIgnoredDuringExecution:
36	nodeSelectorTerms:
37	- matchExpressions:
38	- key: kubernetes.io/e2e-az-name
39	operator: In
40	values:
41	- e2e-az1
42	- e2e-az2
43	podAntiAffinity:
44	requiredDuringSchedulingIgnoredDuringExecution:
45	- podAffinityTerm:
46	topologyKey: nodeId
47	mongosPodSpec:
48	podTemplate:
49	spec:
50	affinity:
51	podAffinity:
52	requiredDuringSchedulingIgnoredDuringExecution:
53	- labelSelector:
54	matchExpressions:
55	- key: security
56	operator: In
57	values:
58	- S1
59	topologyKey: failure-domain.beta.kubernetes.io/zone
60	nodeAffinity:
61	requiredDuringSchedulingIgnoredDuringExecution:
62	nodeSelectorTerms:
63	- matchExpressions:
64	- key: kubernetes.io/e2e-az-name
65	operator: In
66	values:
67	- e2e-az1
68	- e2e-az2
69	podAntiAffinity:
70	requiredDuringSchedulingIgnoredDuringExecution:
71	- podAffinityTerm:
72	topologyKey: nodeId
73	shardPodSpec:
74	podTemplate:
75	spec:
76	affinity:
77	podAffinity:
78	requiredDuringSchedulingIgnoredDuringExecution:
79	- labelSelector:
80	matchExpressions:
81	- key: security
82	operator: In
83	values:
84	- S1
85	topologyKey: failure-domain.beta.kubernetes.io/zone
86	nodeAffinity:
87	requiredDuringSchedulingIgnoredDuringExecution:
88	nodeSelectorTerms:
89	- matchExpressions:
90	- key: kubernetes.io/e2e-az-name
91	operator: In
92	values:
93	- e2e-az1
94	- e2e-az2
95	podAntiAffinity:
96	requiredDuringSchedulingIgnoredDuringExecution:
97	- podAffinityTerm:
98	topologyKey: nodeId
99	...