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Deploy to Local Kubernetes

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Sumit Ghosh edited this page Jul 28, 2020 · 21 revisions

CONTENT

Specifications

We have upgraded K8s scripts to work on the latest stable version of Docker Desktop and Kubernetes. Current dev branch has been tested with the following specifications :

Component Versions
OS Windows 10/ Mac / Linux
Docker Desktop 2.3.0.3
Docker Engine 19.03.8
kubectl 1.16
Kubernetes 1.16.5
Kubernetes-Dashboard 2.0
Helm 3.2.4
Nginx Ingress controller 0.20
Nginx 1.15

Previous Versions

You can still refer the older version of scripts under k8s/archived directory. For more details, please visit archived page.

IMPORTANT: Directory k8s/archived will not be supported in the future.

Install Docker Desktop

You can install Docker Desktop following :

Enable Kubernetes

To enable Kubernetes (k8s) click the Enable Kubernetes checkbox in the Kubernetes tab in Docker Settings and then click the "Apply" button.

If you also enable the "Show system containers" checkbox, you can see Kubernetes system containers running by using docker ps

Your Docker Desktop Kubernetes installation already contains kubectl, which is the CLI to run Kubernetes commands and you'll need for the rest of steps here.

IMPORTANT: You'll also have to increase the memory allocated to Docker to at least 6144 MB, because you'll have 70+ containers running after deploying eShopOnContainers.

Install Helm

Helm is the package manager for Kubernetes.

  • For detailed installation steps, please refer official documentation page.

  • After successful installation, helm version can be seen as per below :

Please note, helm 3 onwards Tiller Server component has been removed. So you wouldn't need to install client and server separately.

Install NGINX Ingress Controller

Ingress is an API object that allows access to your clustered services from the outside. It's like a reverse proxy, that can handle load balancing, TLS, virtual hosting and the like.

NGINX is the Ingress controller used for eShopOnContainers.

To install the NGINX Ingress controller, run the following commands from the deploy/k8s/nginx-ingress folder:

kubectl apply -f mandatory.yaml
kubectl apply -f local-cm.yaml
kubectl apply -f local-svc.yaml

Install eShopOnContainers Using Helm

Go to the deploy/k8s/helm folder in your local copy of the eShopOnContainers repo.

At this point you have two options for installing eShopOnContainers:

  1. Use the public images from DockerHub (eshop) with tag linux-dev
  2. Or Use your local images with tag linux-latest

Deploy Public Images From DockerHub

The easiest way to setup eshop on k8s is to use public images. For that you would require to run below scripts:

  • For Windows :

    .\deploy-all.ps1 -imageTag linux-dev -useLocalk8s $true

  • For Mac :

    .\deploy-all-mac.ps1 -imageTag linux-dev -useLocalk8s $true

Deploy Your Local Images

If you have done some local changes in the eshop application and want to deploy that to the cluster you can do that by building your local docker images.

  • Go to the src directory of your local repo and below command :

    docker-compose build

  • Then, you can go to deploy\k8s\helm directory and run below command to deploy your local images :

    For Windows :

    .\deploy-all.ps1 -imageTag linux-latest -useLocalk8s $true -imagePullPolicy Never

    For Mac :

    .\deploy-all-mac.ps1 -imageTag linux-latest -useLocalk8s $true -imagePullPolicy Never

The parameter useLocalk8s to $true, forces the script to use localhost as the DNS for all Helm charts and also creates the ingress with the correct ingress class.

Note: When using the parameter imagePullPolicy to Never only local images will be used (pods will enter in error state if local images do not exist. If imagePullPolicy is set to IfNotPresent then local images will be used if present, and if not Kubernetes will try to download them from a docker registry. If the imagePullPolicy is set to Always then Kubernetes will never use the local images and will try to download them all from a docker registry. If the images are not found pods will enter in error state.

Check Deployment Status

After running the deployment script you can check the deployment status with the command:

kubectl get deployment

After a while (could be ~5 min) you should get an output similar to this one:

NAME                             DESIRED   CURRENT   UP-TO-DATE   AVAILABLE   AGE
eshop-apigwmm                    1         1         1            1           2h
eshop-apigwms                    1         1         1            1           2h
eshop-apigwwm                    1         1         1            1           2h
eshop-apigwws                    1         1         1            1           2h
eshop-basket-api                 1         1         1            1           2h
eshop-basket-data                1         1         1            1           2h
eshop-catalog-api                1         1         1            1           2h
eshop-identity-api               1         1         1            1           2h
eshop-keystore-data              1         1         1            1           2h
eshop-locations-api              1         1         1            1           2h
eshop-marketing-api              1         1         1            1           2h
eshop-mobileshoppingagg          1         1         1            1           2h
eshop-nosql-data                 1         1         1            1           2h
eshop-ordering-api               1         1         1            1           2h
eshop-ordering-backgroundtasks   1         1         1            1           2h
eshop-ordering-signalrhub        1         1         1            1           2h
eshop-payment-api                1         1         1            1           2h
eshop-rabbitmq                   1         1         1            1           2h
eshop-sql-data                   1         1         1            1           2h
eshop-webmvc                     1         1         1            1           2h
eshop-webshoppingagg             1         1         1            1           2h
eshop-webspa                     1         1         1            1           2h
eshop-webstatus                  1         1         1            1           2h

To check the public service exposed, run:

kubectl get ing

You should get an output similar to this one:

NAME                 HOSTS       ADDRESS     PORTS     AGE
eshop-apigwmm        localhost   localhost   80        2h
eshop-apigwms        localhost   localhost   80        2h
eshop-apigwwm        localhost   localhost   80        2h
eshop-apigwws        localhost   localhost   80        2h
eshop-identity-api   localhost   localhost   80        2h
eshop-webmvc         localhost   localhost   80        2h
eshop-webspa         localhost   localhost   80        2h
eshop-webstatus      localhost   localhost   80        2h

Note that ingresses are bound to DNS localhost and the host is also "localhost". So, you can access the webspa app in the address: http://localhost and the MVC in: http://localhost/webmvc

As this is the Docker local k8s cluster, you can see also the containers running on your machine.

If you type the command:

docker ps

You should see them all (something similar to this):

CONTAINER ID        IMAGE                            COMMAND                  CREATED             STATUS              PORTS               NAMES
fec1e3499416        a3f21ec4bd11                     "/entrypoint.sh /ngi…"   9 minutes ago       Up 9 minutes                            k8s_nginx-ingress-controller_nginx-ingress-controller-f88c75bc6-5xs2n_ingress-nginx_f1cc7094-e68f-11e8-b4b6-00155d016146_0
76485867f032        eshop/payment.api                "dotnet Payment.API.…"   2 hours ago         Up 2 hours                              k8s_payment-api_eshop-payment-api-75d5f9bdf6-6zx2v_default_4a3cdab4-e67f-11e8-b4b6-00155d016146_1
c2c4640ed610        eshop/marketing.api              "dotnet Marketing.AP…"   2 hours ago         Up 2 hours                              k8s_marketing-api_eshop-marketing-api-6b8c5989fd-jpxqv_default_45780626-e67f-11e8-b4b6-00155d016146_1
85301d538574        eshop/ordering.signalrhub        "dotnet Ordering.Sig…"   2 hours ago         Up 2 hours                              k8s_ordering-signalrhub_eshop-ordering-signalrhub-58cf5ff6-cnlm8_default_4932c344-e67f-11e8-b4b6-00155d016146_1
7a408a98000e        eshop/ordering.backgroundtasks   "dotnet Ordering.Bac…"   2 hours ago         Up 2 hours                              k8s_ordering-backgroundtasks_eshop-ordering-backgroundtasks-cc8f6d4d8-ztfk7_default_47f9cf10-e67f-11e8-b4b6-00155d016146_1
12c64b3a13e0        eshop/basket.api                 "dotnet Basket.API.d…"   2 hours ago         Up 2 hours                              k8s_basket-api_eshop-basket-api-658546684d-6hlvd_default_4262d022-e67f-11e8-b4b6-00155d016146_1
133fccfeeff3        eshop/webstatus                  "dotnet WebStatus.dll"   2 hours ago         Up 2 hours                              k8s_webstatus_eshop-webstatus-7f46479dc4-bqnq7_default_4dc13eb2-e67f-11e8-b4b6-00155d016146_0
00c6e4c52135        eshop/webspa                     "dotnet WebSPA.dll"      2 hours ago         Up 2 hours                              k8s_webspa_eshop-webspa-64cb8df9cb-dcbwg_default_4cd47376-e67f-11e8-b4b6-00155d016146_0
d4507f1f6b1a        eshop/webshoppingagg             "dotnet Web.Shopping…"   2 hours ago         Up 2 hours                              k8s_webshoppingagg_eshop-webshoppingagg-cc94fc86-sxd2v_default_4be6cdb9-e67f-11e8-b4b6-00155d016146_0
9178e26703da        eshop/webmvc                     "dotnet WebMVC.dll"      2 hours ago         Up 2 hours                              k8s_webmvc_eshop-webmvc-985779684-4br5z_default_4addd4d6-e67f-11e8-b4b6-00155d016146_0
1088c281c710        eshop/ordering.api               "dotnet Ordering.API…"   2 hours ago         Up 2 hours                              k8s_ordering-api_eshop-ordering-api-fb8c548cb-k68x9_default_4740958a-e67f-11e8-b4b6-00155d016146_0
12424156d5c9        eshop/mobileshoppingagg          "dotnet Mobile.Shopp…"   2 hours ago         Up 2 hours                              k8s_mobileshoppingagg_eshop-mobileshoppingagg-b54645d7b-rlrgh_default_46c00017-e67f-11e8-b4b6-00155d016146_0
65463ffd437d        eshop/locations.api              "dotnet Locations.AP…"   2 hours ago         Up 2 hours                              k8s_locations-api_eshop-locations-api-577fc94696-dfhq8_default_44929c4b-e67f-11e8-b4b6-00155d016146_0
5b3431873763        eshop/identity.api               "dotnet Identity.API…"   2 hours ago         Up 2 hours                              k8s_identity-api_eshop-identity-api-85d9b79f4-s5ks7_default_43d6eb7c-e67f-11e8-b4b6-00155d016146_0
7c8e77252459        eshop/catalog.api                "dotnet Catalog.API.…"   2 hours ago         Up 2 hours                              k8s_catalog-api_eshop-catalog-api-59fd444fb-ztvhz_default_4356705a-e67f-11e8-b4b6-00155d016146_0
94d95d0d3653        eshop/ocelotapigw                "dotnet OcelotApiGw.…"   2 hours ago         Up 2 hours                              k8s_apigwws_eshop-apigwws-65474b979d-n99jw_default_41395473-e67f-11e8-b4b6-00155d016146_0
bc4bbce71d5f        eshop/ocelotapigw                "dotnet OcelotApiGw.…"   2 hours ago         Up 2 hours                              k8s_apigwwm_eshop-apigwwm-857c549dd8-8w5gv_default_4098d770-e67f-11e8-b4b6-00155d016146_0
840aabcceaa9        eshop/ocelotapigw                "dotnet OcelotApiGw.…"   2 hours ago         Up 2 hours                              k8s_apigwms_eshop-apigwms-5b94dfb54b-dnmr9_default_401fc611-e67f-11e8-b4b6-00155d016146_0
aabed7646f5b        eshop/ocelotapigw                "dotnet OcelotApiGw.…"   2 hours ago         Up 2 hours                              k8s_apigwmm_eshop-apigwmm-85f96cbdb4-dhfwr_default_3ed7967a-e67f-11e8-b4b6-00155d016146_0
49c5700def5a        f06a5773f01e                     "docker-entrypoint.s…"   2 hours ago         Up 2 hours                              k8s_basket-data_eshop-basket-data-66fbc788cc-csnlw_default_3e0c45fe-e67f-11e8-b4b6-00155d016146_0
a5db4c521807        f06a5773f01e                     "docker-entrypoint.s…"   2 hours ago         Up 2 hours                              k8s_keystore-data_eshop-keystore-data-5c9c85cb99-8k56s_default_3ce1a273-e67f-11e8-b4b6-00155d016146_0
aae88fd2d810        d69a5113ceae                     "docker-entrypoint.s…"   2 hours ago         Up 2 hours                              k8s_rabbitmq_eshop-rabbitmq-6b68647bc4-gr565_default_3c37ee6a-e67f-11e8-b4b6-00155d016146_0
65d49ca9589d        bbed8d0e01c1                     "docker-entrypoint.s…"   2 hours ago         Up 2 hours                              k8s_nosql-data_eshop-nosql-data-579c9d89f8-mtt95_default_3b9c1f89-e67f-11e8-b4b6-00155d016146_0
090e0dde2ec4        bbe2822dfe38                     "/opt/mssql/bin/sqls…"   2 hours ago         Up 2 hours                              k8s_sql-data_eshop-sql-data-5c4fdcccf4-bscdb_default_3afd29b8-e67f-11e8-b4b6-00155d016146_0

Known Behaviours

Login from the webmvc results in following error: HttpRequestException: Response status code does not indicate success: 404 (Not Found).

The reason is because MVC needs to access the Identity Server from both outside the container (browser) and inside the container (C# code). Thus, the configuration uses always the external url of the Identity Server, which in this case is just http://localhost/identity-api. But this external url is incorrect when used from C# code, and the web mvc can't access the identity api. This is the only case when this issue happens (and is the reason why we use 10.0.75.1 for local address in web mvc in local development mode)

Solving this requires some manual steps:

From the deploy/k8s folder run the following command:

kubectl apply -f .\nginx-ingress\local-dockerk8s\mvc-fix.yaml

This will create two additional ingresses (for MVC and Identity API) to any valid DNS that points to your machine. This enable the use of 10.75.0.1 IP.

Update the configmap of Web MVC by typing (line breaks are mandatory):

kubectl patch cm cfg-eshop-webmvc --type strategic --patch @'
data:
  urls__IdentityUrl: http://10.0.75.1/identity
  urls__mvc: http://10.0.75.1/webmvc
'@

Update the configmap of Identity API by typing (line breaks are mandatory):

kubectl patch cm cfg-eshop-identity-api --type strategic --patch @'
data:
  mvc_e: http://10.0.75.1/webmvc
'@

Restart the SQL Server pod to ensure the database is recreated again:

kubectl delete pod --selector="app=sql-data"

Wait until SQL Server pod is ready to accept connections and then restart all other pods:

kubectl delete pod --selector="app!=sql-data"

Note: Pods are deleted to ensure the databases are recreated again, as identity api stores its client names and urls in the database. If client name doesn't get updated properly you may run into Sorry, there was an error : unauthorized_client

Now, you can access the MVC app using: http://10.0.75.1/webmvc. All other services (like SPA) must be accessed using http://localhost

Few environments, do have issues with Ip 10.0.75.1. This could be happening because of following reasons :

In such scenarios, if either docker special DNS name or host machine IP is working fine then you could use any of that rather using 10.0.75.1. For e.g - host.docker.internal or docker.for.win.localhost or 192.168.10.20. But you would need to repeat above steps again.

  • Update the configmap of Web MVC, by typing :
  kubectl patch cm cfg-eshop-webmvc --type strategic --patch @'
  data:
    urls__IdentityUrl: http://<dns or ip>/identity
    urls__mvc: http://<dns or ip>/webmvc
  '@
  • Update the configmap of Identity API like above.
  • Clean up and restart the SQL Server pod again to update client information.
  • After that, you should be able to browse the app using below urls.

Explore eShopOnContainers

After a while, when all services are running OK, you should get to see something like this:

Optional :

Delete Deployments

To delete eShop related deployments you can use this command:

helm uninstall $(helm ls --filter eshop -q)

Before performing actual delete if you want to perform a dry run, below command is useful.

helm uninstall $(helm ls --filter eshop -q) --dry-run

Explore Internal Services

You can expose internal services by using NodePorts (among some other options)

To expose the SQL Server service and the RabbitMQ admin port, when deploying to local Kubernetes, you can run the following script, from the k8s folder:

.\deploy-nodeports.ps1

This will expose the following infrastructure services:

  • SQL Server (connect with SSMS to tcp:localhost,31433 with User Id=sa;Password=Pass@word; and explore databases:
    • Identity: Microsoft.eShopOnContainers.Service.IdentityDb
    • Catalog: Microsoft.eShopOnContainers.Services.CatalogDb
    • Marketing: Microsoft.eShopOnContainers.Services.MarketingDb
    • Ordering: Microsoft.eShopOnContainers.Services.OrdeingDb
    • Webhooks: Microsoft.eShopOnContainers.Services.WebhooksDb
  • RabbitMQ (Queue management): http://localhost:31672/ (login with username=guest, password=guest)

Install Kubernetes Dashboard UI

You can deploy Kubernetes Web UI (Dashboard) to monitor the cluster locally.

To enable the dashboard:

  1. Go to the k8s folder in your local copy of the eShopOnContainers repo.

  2. Deploy the dashboard with this command:

    kubectl apply -f https://raw.githubusercontent.com/kubernetes/dashboard/v2.0.0-beta6/aio/deploy/recommended.yaml

  3. Create a sample admin user and role binding by running the script:

    kubectl apply -f dashboard-adminuser.yaml

  4. Execute the dashboard by running this command:

    kubectl proxy

  5. Get the bearer token to login to the dashboard by running this command:

    kubectl -n kube-system describe secret $(kubectl -n kube-system get secret | grep admin-user | awk '{print $1}')

    You should get something like this:

    Name:         admin-user-token-95nxr
Namespace:    kube-system
Labels:       <none>
Annotations:  kubernetes.io/service-account.name=admin-user
              kubernetes.io/service-account.uid=aec979a2-7cb4-11e9-96aa-00155d013633

Type:  kubernetes.io/service-account-token

Data
====
ca.crt:     1025 bytes
namespace:  11 bytes
token:      eyJhbGciOiJSUzI1NiIsImtpZCI...(800+ characters)...FkM_tAclj9o8T7ALdPZciaQ

  6. Copy the token and navigate to: http://localhost:8001/api/v1/namespaces/kubernetes-dashboard/services/https:kubernetes-dashboard:/proxy/#/login

  7. Select "Token" and paste the copied the token in the "Enter token" filed:

    You should see something like this:

    From there you can explore all the components of your cluster.

    IMPORTANT You have to manually start the dashboard and get a new login token every time you restart the cluster.

Reset Kubernetes

To reset the Kubernetes cluster to the initial (new) state, you have to:

  1. Click the "Reset" tab on the Kubernetes settings dialog
  2. Click "Reset Kubernetes Cluster..."
  3. Click the "Reset" button on the "Reset Kubernetes cluster" confirmation dialog.

As shown in the next image:

Disable / Stop Kubernetes

If you ever want to stop Kubernetes from Docker Desktop, just disable Kubernetes in the Settings > Kubernetes page above and click "Apply & Restart".

Additional Resources

eShopOnContainers

Getting started

FREQUENT ERRORS

Explore

Deployment

Local

Production (generic)

Cloud

Other Deployment Scenarios

DevOps

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