配置 TLS 证书

本节将指导您为MongoDB的每个组件创建 TLS 证书，以及在每个Kubernetes集群中创建Kubernetes密钥，以便将 TLS 证书安全地挂载到相应的Kubernetes Pod 中。

下面概述的进程利用 Cert 经理创建 TLS 证书。但请注意，这是一份固执己见的指南， MongoDB不支持 CertManager。此外，CertManager 只是向Kubernetes集群添加 TLS 证书的众多方法之一。此外，自签名证书可能不适合生产部署，具体取决于组织的安全要求。如果您需要公开信任的证书，请相应地配置您的发行者或直接提供 TLS 证书。要学习；了解详情，请参阅设置 cert-manager 集成。

先决条件

开始之前，请执行以下任务：

安装 kubectl。
安装 Helm。
按照 GKE 集群指南中的说明设置 K8S_CLUSTER_*_CONTEXT_NAME 环境变量。

源代码

您可以在MongoDB Kubernetes Operator存储库中找到所有包含的源代码。

步骤

添加 Helm Charts 存储库。

1 helm repo add jetstack https://charts.jetstack.io --force-update

使用 Helm 安装 cert-manager。

1 helm upgrade --install \
2   cert-manager jetstack/cert-manager \
3   --kube-context "${K8S_CLUSTER_0_CONTEXT_NAME}" \
4   --namespace cert-manager \
5   --create-namespace \
6   --set crds.enabled=true

Release "cert-manager" does not exist. Installing it now.
NAME: cert-manager
LAST DEPLOYED: Thu May 22 14:12:18 2025
NAMESPACE: cert-manager
STATUS: deployed
REVISION: 1
TEST SUITE: None
NOTES:
cert-manager v1.17.2 has been deployed successfully!
In order to begin issuing certificates, you will need to set up a ClusterIssuer
or Issuer resource (for example, by creating a 'letsencrypt-staging' issuer).
More information on the different types of issuers and how to configure them
can be found in our documentation:
https://cert-manager.io/docs/configuration/
For information on how to configure cert-manager to automatically provision
Certificates for Ingress resources, take a look at the `ingress-shim`
documentation:
https://cert-manager.io/docs/usage/ingress/

创建证书颁发者。

1 kubectl apply --context "${K8S_CLUSTER_0_CONTEXT_NAME}" -f - <<EOF
2 apiVersion: cert-manager.io/v1
3 kind: ClusterIssuer
4 metadata:
5   name: selfsigned-cluster-issuer
6 spec:
7   selfSigned: {}
8 EOF
9 
10 kubectl --context "${K8S_CLUSTER_0_CONTEXT_NAME}" wait --for=condition=Ready clusterissuer selfsigned-cluster-issuer
11 
12 kubectl apply --context "${K8S_CLUSTER_0_CONTEXT_NAME}" -f - <<EOF
13 apiVersion: cert-manager.io/v1
14 kind: Certificate
15 metadata:
16   name: my-selfsigned-ca
17   namespace: cert-manager
18 spec:
19   isCA: true
20   commonName: my-selfsigned-ca
21   secretName: root-secret
22   privateKey:
23     algorithm: ECDSA
24     size: 256
25   issuerRef:
26     name: selfsigned-cluster-issuer
27     kind: ClusterIssuer
28 EOF
29 
30 kubectl --context "${K8S_CLUSTER_0_CONTEXT_NAME}" wait --for=condition=Ready -n cert-manager certificate my-selfsigned-ca
31 
32 kubectl apply --context "${K8S_CLUSTER_0_CONTEXT_NAME}" -f - <<EOF
33 apiVersion: cert-manager.io/v1
34 kind: ClusterIssuer
35 metadata:
36   name: my-ca-issuer
37 spec:
38   ca:
39     secretName: root-secret
40 EOF
41 
42 kubectl --context "${K8S_CLUSTER_0_CONTEXT_NAME}" wait --for=condition=Ready clusterissuer my-ca-issuer

验证发行者的创建。

1 kubectl apply --context "${K8S_CLUSTER_0_CONTEXT_NAME}" -f - <<EOF
2 apiVersion: cert-manager.io/v1
3 kind: Certificate
4 metadata:
5   name: test-selfsigned-cert
6   namespace: cert-manager
7 spec:
8   dnsNames:
9     - example.com
10   secretName: test-selfsigned-cert-tls
11   issuerRef:
12     name: my-ca-issuer
13     kind: ClusterIssuer
14 EOF
15 
16 kubectl --context "${K8S_CLUSTER_0_CONTEXT_NAME}" wait -n cert-manager --for=condition=Ready certificate test-selfsigned-cert
17 
18 kubectl --context "${K8S_CLUSTER_0_CONTEXT_NAME}" delete -n cert-manager certificate test-selfsigned-cert

certificate.cert-manager.io/test-selfsigned-cert created
certificate.cert-manager.io/test-selfsigned-cert condition met
certificate.cert-manager.io "test-selfsigned-cert" deleted

创建 CA configMap。

如果您的MongoDB Ops Manager TLS 证书由自定义 CA 签名，则该 CA 证书还必须包含允许代理从互联网下载MongoDB二进制文件的其他证书。要创建 TLS 证书，请创建 ConfigMap 来保存 CA 证书：

1 mkdir -p certs
2 
3 openssl s_client -showcerts -verify 2 \
4 -connect downloads.mongodb.com:443 -servername downloads.mongodb.com < /dev/null \
5 | awk '/BEGIN/,/END/{ if(/BEGIN/){a++}; out="certs/cert"a".crt"; print >out}'
6 
7 kubectl --context "${K8S_CLUSTER_0_CONTEXT_NAME}" get secret root-secret -n cert-manager -o jsonpath="{.data['ca\.crt']}" | base64 --decode > certs/ca.crt
8 cat certs/ca.crt certs/cert2.crt certs/cert3.crt  >> certs/mms-ca.crt
9 
10 kubectl --context "${K8S_CLUSTER_0_CONTEXT_NAME}" create cm ca-issuer -n "${MDB_NAMESPACE}" --from-file=ca-pem=certs/mms-ca.crt --from-file=mms-ca.crt=certs/mms-ca.crt
11 kubectl --context "${K8S_CLUSTER_0_CONTEXT_NAME}" create cm ca-issuer -n "${OM_NAMESPACE}" --from-file=ca-pem=certs/mms-ca.crt --from-file=mms-ca.crt=certs/mms-ca.crt

后退

部署 Operator

来年

多集群MongoDB Ops Manager

1	helm upgrade --install \
2	cert-manager jetstack/cert-manager \
3	--kube-context "${K8S_CLUSTER_0_CONTEXT_NAME}" \
4	--namespace cert-manager \
5	--create-namespace \
6	--set crds.enabled=true

1	kubectl apply --context "${K8S_CLUSTER_0_CONTEXT_NAME}" -f - <<EOF
2	apiVersion: cert-manager.io/v1
3	kind: ClusterIssuer
4	metadata:
5	name: selfsigned-cluster-issuer
6	spec:
7	selfSigned: {}
8	EOF
9
10	kubectl --context "${K8S_CLUSTER_0_CONTEXT_NAME}" wait --for=condition=Ready clusterissuer selfsigned-cluster-issuer
11
12	kubectl apply --context "${K8S_CLUSTER_0_CONTEXT_NAME}" -f - <<EOF
13	apiVersion: cert-manager.io/v1
14	kind: Certificate
15	metadata:
16	name: my-selfsigned-ca
17	namespace: cert-manager
18	spec:
19	isCA: true
20	commonName: my-selfsigned-ca
21	secretName: root-secret
22	privateKey:
23	algorithm: ECDSA
24	size: 256
25	issuerRef:
26	name: selfsigned-cluster-issuer
27	kind: ClusterIssuer
28	EOF
29
30	kubectl --context "${K8S_CLUSTER_0_CONTEXT_NAME}" wait --for=condition=Ready -n cert-manager certificate my-selfsigned-ca
31
32	kubectl apply --context "${K8S_CLUSTER_0_CONTEXT_NAME}" -f - <<EOF
33	apiVersion: cert-manager.io/v1
34	kind: ClusterIssuer
35	metadata:
36	name: my-ca-issuer
37	spec:
38	ca:
39	secretName: root-secret
40	EOF
41
42	kubectl --context "${K8S_CLUSTER_0_CONTEXT_NAME}" wait --for=condition=Ready clusterissuer my-ca-issuer

1	mkdir -p certs
2
3	openssl s_client -showcerts -verify 2 \
4	-connect downloads.mongodb.com:443 -servername downloads.mongodb.com < /dev/null \
5	\| awk '/BEGIN/,/END/{ if(/BEGIN/){a++}; out="certs/cert"a".crt"; print >out}'
6
7	kubectl --context "${K8S_CLUSTER_0_CONTEXT_NAME}" get secret root-secret -n cert-manager -o jsonpath="{.data['ca\.crt']}" \| base64 --decode > certs/ca.crt
8	cat certs/ca.crt certs/cert2.crt certs/cert3.crt >> certs/mms-ca.crt
9
10	kubectl --context "${K8S_CLUSTER_0_CONTEXT_NAME}" create cm ca-issuer -n "${MDB_NAMESPACE}" --from-file=ca-pem=certs/mms-ca.crt --from-file=mms-ca.crt=certs/mms-ca.crt
11	kubectl --context "${K8S_CLUSTER_0_CONTEXT_NAME}" create cm ca-issuer -n "${OM_NAMESPACE}" --from-file=ca-pem=certs/mms-ca.crt --from-file=mms-ca.crt=certs/mms-ca.crt