examples: add Tarantool Data Grid example

Author: vasiliy-t

examples/README.md

@@ -1,3 +1,5 @@
 # Tarantool Operator Examples
 
 [KV storage](./kv) - distributed key value storage
+
+[Tarantool Data Grid](./tarantool-data-grid) - run TDG on Kubernetes

examples/tarantool-data-grid/README.md

@@ -0,0 +1,101 @@
+# Tarantool Data Grid
+
+This folder contains example on how to run [Tarantool Data Grid](https://www.tarantool.io/en/datagrid/) 
+on Kubernetes.
+
+## Requirements
+
+To run this example you will need: 
+
+- [helm](https://helm.sh/docs/intro/install/)
+- [kubectl](https://kubernetes.io/docs/tasks/tools/install-kubectl/)
+- Tarantool Data Grid docker image
+
+## Running example
+
+1. Install Tarantool Helm repo:
+
+    ```shell
+    $ helm repo add tarantool https://tarantool.github.io/tarantool-operator
+    ```
+
+2. Install Tarantool Kubernetes Operator:
+
+    ```shell
+    $ helm install --set namespace=tarantool tarantool-operator tarantool/tarantool-operator --namespace tarantool --create-namespace --version 0.0.6
+    ---
+    NAME: tarantool-operator
+    NAMESPACE: tarantool
+    STATUS: deployed
+    TEST SUITE: None
+    ```
+
+    wait for Operator to become Running:
+
+    ```shell
+    $ kubeclt -n tarantool get pods -w
+    ---
+    NAME                                 READY   STATUS    RESTARTS   AGE
+    tarantool-operator-xxx-yyy           1/1     Running   0          3s
+    ```
+
+3. Get Tarantool Data Grid image:
+
+    - go to [tarantool.io](https://tarantool.io)
+
+    - authorize via "Sign In"
+
+    - then go to "Customer zone" > "tdg"
+
+    - download archive with docker image, this example tested on tdg-1.6.8-xxxxxxx.docker-image.tar.gz
+
+    - import image from archive:
+    
+        ```shell
+        $ docker image load -i tdg-1.6.8-xxxxxxx.docker-image.tar.gz
+        ---
+        Loaded image ID: sha256:b6206567xxxxxxxxxxxxxx
+        ```
+
+    - tag loaded image:
+    
+        ```shell
+        $ docker tag b6206567xxxxxxxxxxxxxx tdg:1.6.8
+        ```
+    
+    - make image available to k8s nodes:
+
+        - push image to your registry, so k8s will be able to download it
+
+        - manually upload image to each node
+
+
+
+4. Take ```values.yaml``` from this folder, change `image.repository` and `image.tag` to point to tdg image and install it with helm:
+
+    ```shell
+    $ helm install -f values.yaml tdg-app tarantool/cartridge --namespace tarantool --version 0.0.6
+    ---
+    NAME: tdg-app
+    NAMESPACE: tarantool
+    STATUS: deployed
+    TEST SUITE: None
+    ```
+
+Wait until pods up and cluster is ready. 
+
+5. Access TDG web ui:
+
+    ```shell
+    kubectl -n tarantool port-forward service/routers 8081:8081
+    ---
+    Forwarding from 127.0.0.1:8081 -> 8081
+    Forwarding from [::1]:8081 -> 8081
+    ...
+    ```
+
+    Now you should be able to navigate to 127.0.0.1:8081 with your browser and access tdg web ui.
+
+Now you should have running Tarantool Data Grid cluster. 
+
+Proceed to our [TDG examples](https://github.com/tarantool/examples/tree/master/tdg) repository to start using cluster.

examples/tarantool-data-grid/values.yaml

@@ -0,0 +1,34 @@
+# Название среды и название кластера.
+ClusterEnv: dev
+ClusterName: test-app
+
+# Installation namespace
+namespace: tarantool
+
+# Docker image to run
+image:
+  repository: tdg
+  tag: 1.6.8
+  pullPolicy: IfNotPresent
+
+# Cluster topology
+RoleConfig:
+  - RoleName: routers   # Tarantool replicaset name
+    ReplicaCount: 1     # Number of replicas in each replicaset
+    ReplicaSetCount: 1  # Number of replicasets for this role(s)
+    DiskSize: 1Gi       # Persistent Volume disk sze
+    CPUallocation: 0.25 # Number of vCPUs to allocate to each container
+    MemtxMemoryMB: 256  # MB of memory to be assigned to each container
+    RolesToAssign:      # Tarantool Cartridge roles to assign
+      - account_manager
+      - input_processor
+      - connector
+      - scheduler
+      - task_runner
+      - frontend
+      - notifier
+      - output_processor
+      - storage
+      - logger
+      - sequence_generator
+      - failover-coordinator