Copy all files from kubernetes repo into this one

This commit is a like-for-like copy of the [kubernetes repo](https://github.com/python-discord/kubernetes) check that repo for comit history prioir to this commit.

Co-authored-by: Amrou Bellalouna <[email protected]>
Co-authored-by: Bradley Reynolds <[email protected]>
Co-authored-by: Chris <[email protected]>
Co-authored-by: Chris Lovering <[email protected]>
Co-authored-by: ChrisJL <[email protected]>
Co-authored-by: Den4200 <[email protected]>
Co-authored-by: GDWR <[email protected]>
Co-authored-by: Hassan Abouelela <[email protected]>
Co-authored-by: Hassan Abouelela <[email protected]>
Co-authored-by: jchristgit <[email protected]>
Co-authored-by: Joe Banks <[email protected]>
Co-authored-by: Joe Banks <[email protected]>
Co-authored-by: Joe Banks <[email protected]>
Co-authored-by: Johannes Christ <[email protected]>
Co-authored-by: Kieran Siek <[email protected]>
Co-authored-by: kosayoda <[email protected]>
Co-authored-by: ks129 <[email protected]>
Co-authored-by: Leon Sand├©y <[email protected]>
Co-authored-by: Leon Sand├©y <[email protected]>
Co-authored-by: MarkKoz <[email protected]>
Co-authored-by: Matteo Bertucci <[email protected]>
Co-authored-by: Sebastiaan Zeeff <[email protected]>
Co-authored-by: Sebastiaan Zeeff <[email protected]>
Co-authored-by: vcokltfre <[email protected]>

5 files changed, 90 insertions, 0 deletions

diff --git a/kubernetes/namespaces/default/mongodb/README.md b/kubernetes/namespaces/default/mongodb/README.md
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+# Python Discord MongoDB
+This folder contains the configuration for Python Discord's MongoDB instance.
+
+## Volume
+A 10Gi volume is provisioned on the Linode Block Storage (Retain) storage class.
+
+## Secrets
+| Key                          | Value                      | Description                     |
+| ---------------------------- | -------------------------- | ------------------------------- |
+| `MONGO_INITDB_ROOT_USERNAME` | `pythondiscord`            | Username of root user           |
+| `MONGO_INITDB_ROOT_PASSWORD` | Root password for database | Password for the root user      |
+
+
+## Deployment
+The deployment will pull the `mongo:latest` image from DockerHub.
+
+It will mount the created volume at `/data/db`.
+
+It will expose port `27017` to connect to MongoDB.
+
+## Service
+A service called `mongodb` will be created to give the deployment a cluster local DNS record of `mongodb.default.svc.cluster.local`.
diff --git a/kubernetes/namespaces/default/mongodb/deployment.yaml b/kubernetes/namespaces/default/mongodb/deployment.yaml
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+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: mongodb
+spec:
+  replicas: 1
+  strategy:
+    type: Recreate
+  selector:
+    matchLabels:
+      app: mongodb
+  template:
+    metadata:
+      labels:
+        app: mongodb
+    spec:
+      containers:
+        - name: mongodb
+          image: mongo:4.4
+          imagePullPolicy: Always
+          ports:
+            - containerPort: 27017
+          resources:
+            requests:
+              cpu: 100m
+              memory: 300Mi
+            limits:
+              cpu: 200m
+              memory: 400Mi
+          volumeMounts:
+            - mountPath: /data/db
+              name: mongodb-volume
+            - mountPath: /tmp
+              name: mongo-temp
+          envFrom:
+          - secretRef:
+              name: mongo-credentials
+          securityContext:
+            readOnlyRootFilesystem: true
+      volumes:
+        - name: mongodb-volume
+          persistentVolumeClaim:
+            claimName: mongodb-storage
+        - name: mongo-temp
+          emptyDir:
+            medium: Memory
diff --git a/kubernetes/namespaces/default/mongodb/secrets.yaml b/kubernetes/namespaces/default/mongodb/secrets.yaml
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+++ b/kubernetes/namespaces/default/mongodb/secrets.yaml
diff --git a/kubernetes/namespaces/default/mongodb/service.yaml b/kubernetes/namespaces/default/mongodb/service.yaml
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+apiVersion: v1
+kind: Service
+metadata:
+  name: mongodb
+spec:
+  ports:
+    - port: 27017
+  selector:
+    app: mongodb
diff --git a/kubernetes/namespaces/default/mongodb/volume.yaml b/kubernetes/namespaces/default/mongodb/volume.yaml
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+kind: PersistentVolumeClaim
+apiVersion: v1
+metadata:
+  name: mongodb-storage
+  labels:
+    app: mongodb
+spec:
+  storageClassName: linode-block-storage-retain
+  accessModes:
+    - ReadWriteOnce
+  resources:
+    requests:
+      storage: 10Gi