Chainguard Container for mongodb-kubernetes-operator-fips
Chainguard's MongoDB Kubernetes Operator image enables you to deploy a MongoDB community instance to a Kubernetes cluster, as well as support replica sets, scaling the replicas up or down, version upgrades, custom roles, and TLS security.
Chainguard Containers are regularly-updated, secure-by-default container images.
Download this Container Image
For those with access, this container image is available on cgr.dev
:
docker pull cgr.dev/ORGANIZATION/mongodb-kubernetes-operator-fips:latest
Be sure to replace the ORGANIZATION
placeholder with the name used for your organization's private repository within the Chainguard Registry.
Compatibility Notes
Chainguard's MongoDB Kubernetes Operator image is comparable to the MongoDB Kubernetes Operator image maintained by MongoDB.
Chainguard's MongoDB Kubernetes Operator expects /bin/sh
to be available in the MongoDB container image. If you're not using the -dev
variant, you'll need to ensure your MongoDB image includes bash
or a bash-binsh
symlink to provide compatibility.
For TLS to work with our FIPS image, we had to add a patch to swap MD5 with SHA-256, since using MD5 caused a crash due to OpenSSL rejecting unsupported algorithms under FIPS mode (EVP_DigestInit_ex
failure from md5Hex
in SCRAM credential generation).
Note that the upstream image runs the container as uid=2000
and gid=0
, but we've verified that the image works correctly with uid=65532
and gid=65532
, so we've configured it to run as non-root.
Additionally, the upstream components of the MongoDB Kubernetes Operator use different versioning schemes. For example, the main operator uses versions like 0.12.x
, while the version hook component uses 1.0.x
. You can see this in the upstream release.json
. In contrast, Chainguard images for all related components (e.g., the operator and version hook) will share the same tag, aligned with the main operator version. This is due to our Git-based automation, and because upstream does not provide separate Git tags for components like the version hook (see tags). While this differs from upstream's tagging scheme, all components are still built from the same source and version-aligned internally. Be aware that users will not see separate tags per component.
Getting Started
To get started with Chainguard's MongoDB Kubernetes Operator image, begin by installing the CRDs:
kubectl apply -f https://raw.githubusercontent.com/mongodb/mongodb-kubernetes-operator/refs/heads/master/config/crd/bases/mongodbcommunity.mongodb.com_mongodbcommunity.yaml
To launch the MongoDB Kubernetes Operator in a Docker container, use the following command:
docker run --rm \
--net=host \
-v ~/.kube/config:/root/.kube/config:ro \
-e KUBECONFIG=/root/.kube/config \
-e AGENT_IMAGE="quay.io/mongodb/mongodb-agent-ubi:108.0.2.8729-1" \
-e VERSION_UPGRADE_HOOK_IMAGE="quay.io/mongodb/mongodb-kubernetes-operator-version-upgrade-post-start-hook:1.0.9" \
-e READINESS_PROBE_IMAGE="quay.io/mongodb/mongodb-kubernetes-readinessprobe:1.0.22" \
-e WATCH_NAMESPACE="*" \
cgr.dev/ORGANIZATION/mongodb-kubernetes-operator-fips:latest
To deploy the MongoDB Kubernetes Operator in your cluster, create the required service account and role:
cat <<EOF > service_account.yaml
---
apiVersion: v1
kind: ServiceAccount
metadata:
name: mongodb-kubernetes-operator
namespace: default
---
apiVersion: rbac.authorization.k8s.io/v1
kind: Role
metadata:
name: mongodb-kubernetes-operator
namespace: default
rules:
- apiGroups: [""]
resources: ["configmaps", "secrets"]
verbs: ["get", "list", "watch", "create", "update", "delete"]
- apiGroups: ["apps"]
resources: ["deployments", "statefulsets"]
verbs: ["get", "list", "watch", "create", "update", "patch", "delete"]
- apiGroups: ["mongodbcommunity.mongodb.com"]
resources: ["mongodbcommunity", "mongodbcommunity/status", "mongodbcommunity/spec", "mongodbcommunity/finalizers"]
verbs: ["get", "list", "watch", "create", "update", "patch", "delete"]
---
apiVersion: rbac.authorization.k8s.io/v1
kind: RoleBinding
metadata:
name: mongodb-kubernetes-operator-binding
namespace: default
subjects:
- kind: ServiceAccount
name: mongodb-kubernetes-operator
namespace: default
roleRef:
kind: Role
name: mongodb-kubernetes-operator
apiGroup: rbac.authorization.k8s.io
EOF
Next, create a deployment manifest that will deploy the operator with the Chainguard image:
cat <<EOF > manager.yaml
apiVersion: apps/v1
kind: Deployment
metadata:
annotations:
email: support@mongodb.com
labels:
owner: mongodb
name: mongodb-kubernetes-operator
spec:
replicas: 1
selector:
matchLabels:
name: mongodb-kubernetes-operator
strategy:
rollingUpdate:
maxUnavailable: 1
type: RollingUpdate
template:
metadata:
labels:
name: mongodb-kubernetes-operator
spec:
affinity:
podAntiAffinity:
requiredDuringSchedulingIgnoredDuringExecution:
- labelSelector:
matchExpressions:
- key: name
operator: In
values:
- mongodb-kubernetes-operator
topologyKey: kubernetes.io/hostname
containers:
- command:
- /usr/local/bin/entrypoint
env:
- name: WATCH_NAMESPACE
valueFrom:
fieldRef:
fieldPath: metadata.namespace
- name: POD_NAME
valueFrom:
fieldRef:
fieldPath: metadata.name
- name: OPERATOR_NAME
value: mongodb-kubernetes-operator
- name: AGENT_IMAGE
value: quay.io/mongodb/mongodb-agent-ubi:108.0.2.8729-1
- name: VERSION_UPGRADE_HOOK_IMAGE
value: quay.io/mongodb/mongodb-kubernetes-operator-version-upgrade-post-start-hook:1.0.9
- name: READINESS_PROBE_IMAGE
value: quay.io/mongodb/mongodb-kubernetes-readinessprobe:1.0.22
- name: MONGODB_IMAGE
value: mongodb-community-server
- name: MONGODB_REPO_URL
value: quay.io/mongodb
image: cgr.dev/ORGANIZATION/mongodb-kubernetes-operator-fips:latest
imagePullPolicy: Always
name: mongodb-kubernetes-operator
resources:
limits:
cpu: 1100m
memory: 1Gi
requests:
cpu: 500m
memory: 200Mi
securityContext:
readOnlyRootFilesystem: true
runAsUser: 2000
allowPrivilegeEscalation: false
securityContext:
seccompProfile:
type: RuntimeDefault
serviceAccountName: mongodb-kubernetes-operator
EOF
Finally, apply the service account and deployment:
kubectl apply -f service_account.yaml
kubectl apply -f manager.yaml
Secure MongoDB resource connections using TLS
Add the cert-manager
repository to your helm
repository list and ensure it's up to date:
helm repo add jetstack https://charts.jetstack.io
helm repo update
Install cert-manager
:
helm install cert-manager jetstack/cert-manager --namespace cert-manager --create-namespace --set crds.enabled=true
Create a TLS-secured MongoDBCommunity resource:
helm repo add mongodb https://mongodb.github.io/helm-charts
helm upgrade --install mongodb-kubernetes-operator mongodb/community-operator \
--set operator.operatorImageName="ORGANIZATION/mongodb-kubernetes-operator-fips" \
--set operator.version="latest" \
--set registry.operator="cgr.dev" \
--set community-operator-crds.enabled=true
Install mkcert and generate a certificat authority:
brew install mkcert # for Mac
#for Linux / Windows systems refer to https://github.com/FiloSottile/mkcert
mkcert -install
Run the following command and note the location of the generated root CA key and cert:
mkcert --CAROOT
Use the files that you found in the previous step. For example if the location is /root/.local/share/mkcert
:
kubectl create configmap ca-config-map --from-file=ca.crt=/root/.local/share/mkcert/rootCA.pem
kubectl create secret tls ca-key-pair --cert=/root/.local/share/mkcert/rootCA.pem --key=/root/.local/share/mkcert/rootCA-key.pem
Create the Cert Manager issuer and secret:
cat <<EOF > cert-manager-issuer.yaml
apiVersion: cert-manager.io/v1
kind: Issuer
metadata:
name: ca-issuer
spec:
ca:
secretName: ca-key-pair
EOF
cat <<EOF > cert-manager-certificate.yaml
apiVersion: cert-manager.io/v1
kind: Certificate
metadata:
name: cert-manager-certificate
namespace: default
spec:
secretName: mongodb-tls
issuerRef:
name: ca-issuer
kind: Issuer
commonName: "*.mongodb-replica-set-svc.default.svc.cluster.local"
dnsNames:
- "*.mongodb-replica-set-svc.default.svc.cluster.local"
- localhost
ipAddresses:
- 127.0.0.1
- 0.0.0.0
EOF
kubectl apply -f cert-manager-issuer.yaml
kubectl apply -f cert-manager-certificate.yaml
Deploy MongoDB:
cat <<EOF > mongo.yaml
apiVersion: v1
kind: Secret
metadata:
name: my-user-password
type: Opaque
stringData:
password: "ThisIsA$uperStr0ngPassw0rd!123"
---
apiVersion: mongodbcommunity.mongodb.com/v1
kind: MongoDBCommunity
metadata:
name: mongodb-replica-set
spec:
type: ReplicaSet
members: 3
version: "6.0.5"
security:
tls:
enabled: true
certificateKeySecretRef:
name: mongodb-tls
caConfigMapRef:
name: ca-config-map
authentication:
modes: ["SCRAM-SHA-256"]
users:
- name: my-user
db: admin
passwordSecretRef:
name: my-user-password
scramCredentialsSecretName: my-scram
roles:
- { name: clusterAdmin, db: admin }
- { name: userAdminAnyDatabase, db: admin }
- { name: readWriteAnyDatabase, db: admin }
- { name: dbAdminAnyDatabase, db: admin }
statefulSet:
spec:
template:
spec:
containers:
- name: mongodb-agent
env:
- name: GODEBUG
value: "fips140=off"
EOF
kubectl apply -f mongo.yaml
Wait for the replicaset to be available. Once kubectl wait mongodbcommunity/mongodb-replica-set --for=jsonpath='{.status.phase}'=Running
becomes available, you can get your connection string, username, and password by running the following:
kubectl get secret mongodb-replica-set-admin-my-user -o json | jq -r '.data | with_entries(.value |= @base64d)' > conn.json
USERNAME=$(jq -r '.username' conn.json)
PASSWORD=$(jq -r '.password' conn.json)
This is an example to connect to the MongoDB cluster with Mongo shell. Use the CA from mkcert
and the certificate from the previous step.
kubectl port-forward svc/mongodb-replica-set-svc 27017:27017 &
mongosh --tlsCAFile /root/.local/share/mkcert/rootCA.pem "mongodb://$USERNAME:$PASSWORD@localhost:27017/admin?directConnection=true&ssl=true"
Documentation and Resources
What are Chainguard Containers?
Chainguard Containers are minimal container images that are secure by default.
In many cases, the Chainguard Containers tagged as :latest
contain only an open-source application and its runtime dependencies. These minimal container images typically do not contain a shell or package manager. Chainguard Containers are built with Wolfi, our Linux undistro designed to produce container images that meet the requirements of a more secure software supply chain.
The main features of Chainguard Containers include:
For cases where you need container images with shells and package managers to build or debug, most Chainguard Containers come paired with a -dev
variant.
Although the -dev
container image variants have similar security features as their more minimal versions, they feature additional software that is typically not necessary in production environments. We recommend using multi-stage builds to leverage the -dev
variants, copying application artifacts into a final minimal container that offers a reduced attack surface that won’t allow package installations or logins.
Learn More
To better understand how to work with Chainguard Containers, please visit Chainguard Academy and Chainguard Courses.
In addition to Containers, Chainguard offers VMs and Libraries. Contact Chainguard to access additional products.
Trademarks
This software listing is packaged by Chainguard. The trademarks set forth in this offering are owned by their respective companies, and use of them does not imply any affiliation, sponsorship, or endorsement by such companies.