Deployment

GitOps

Big Bang follows a GitOps approach to deployment. All configuration changes will be pulled and reconciled with what is stored in the Git repository. The only exception to this is the initial manifests (e.g., dev.yaml) which points to the Git repository and path.

Installation

1. Before pushing changes to Git, validate all configuration is syntactically correct.

   # If everything is successful, YAML should be output
   kustomize build ./dev
   

2. If you have not already done so, push configuration changes to Git.

   git push
   

3. Validate the Kubernetes context is correct.

   # This should match the environment you intend to deploy
   kubectl config current-context
   

4. Deploy the Big Bang manifest to the cluster.

   kubectl apply -f dev.yaml
   

5. Monitor the deployment.

Upgrade

All changes to the Big Bang cluster should be made through Git. After changes are pushed, Big Bang will automatically reconcile the difference with the cluster.

It may take Big Bang up to 10 minutes to recognize your changes and start to deploy them. This is based on the interval value set for polling. You can force Big Bang to immediately check for changes by running the sync.sh script.

Changes to values can be tested in each environment using the named folders to override values and/or point to specific repo branches or tags. After testing, the changes can be placed into the ./base folder if the change is shared between all environments.

Monitor

The commands detailed in this section will help you monitor the progress of the Big Bang deployment. Review the flowchart, if needed, to understand the progression. Use the Troubleshooting Guide if you have failures.

1. Verify Flux is running.

   kubectl get deploy -n flux-system
   
   # All resources should be in the 'Ready' state
     NAME                      READY   UP-TO-DATE   AVAILABLE   AGE
     source-controller         1/1     1            1           106s
     kustomize-controller      1/1     1            1           106s
     notification-controller   1/1     1            1           105s
     helm-controller           1/1     1            1           106s
   

2. Verify the environment was pulled from the Git repo.

   ```shell kubectl get gitrepository -A

# environment-repo: STATUS should be True NAMESPACE NAME URL READY STATUS AGE bigbang environment-repo https://repo1.dso.mil/big-bang/customers/template.git True Fetched revision: main/185e252f4452d897531ab0314adc7a189562be31 2m7s ```

1. Verify the environment Kustomization properly worked.

   kubectl get kustomizations -A
   
   # `environment`: READY should be True
     NAMESPACE   NAME          READY   STATUS                                                                    AGE
     bigbang     environment   True    Applied revision: main/185e252f4452d897531ab0314adc7a189562be31     6m41s
   

2. Verify the ConfigMaps were deployed.

   kubectl get configmap -l kustomize.toolkit.fluxcd.io/namespace -A
   
   # 'common' and 'environment' should exist
       NAMESPACE   NAME                          DATA   AGE
       bigbang     common-cch6942dk9             1      19m
       bigbang     environment-d2tgb27f56        1      19m
   

3. Verify the Secrets were deployed.

   kubectl get secrets -l kustomize.toolkit.fluxcd.io/namespace -A
   
   # 'common-bb' and 'environment-bb' should exist
   NAMESPACE   NAME                        TYPE     DATA   AGE
   bigbang     common-bb-kc5t8dbdfh        Opaque   1      18m
   bigbang     environment-bb-mhddkt46bd   Opaque   1      18m
   

4. Verify the Big Bang Helm Chart was pulled.

   ```shell kubectl get gitrepositories -A

   ‘bigbang’ READY should be True

   NAME URL READY STATUS AGE bigbang https://repo1.dso.mil/big-bang/bigbang.git True Fetched revision: master/8a4a1ddd0c9edf316f5362680cf2921baf0c3451 25m ```

5. Verify the Big Bang Helm Chart was deployed.

   kubectl get hr -A
   
   # 'bigbang' READY should be True
   NAMESPACE   NAME             READY   STATUS                             AGE
   bigbang     bigbang    True    Release reconciliation succeeded   28m
   

6. Verify Big Bang package Helm charts are pulled.

   ```shell kubectl get gitrepository -A

   The Git repository holding the Helm charts for each package can be seen in the URL column.

   The STATUS column shows the branch and tag of the revision being used.

   NAMESPACE NAME URL READY STATUS AGE bigbang bigbang https://repo1.dso.mil/big-bang/bigbang.git True Fetched revision: master/3a44686520152e576a8c2c6f264876efff497c4b 8m25s bigbang logging https://repo1.dso.mil/big-bang/product/packages/logging.git True Fetched revision: release-v0.2.x/9cfe1e14c12098464ee89eb877614f781cd78fb7 8m23s bigbang certmanager https://repo1.dso.mil/big-bang/product/packages/cert-manager.git True Fetched revision: release-v1.0.x/1247135baf145dcfad4a4a02ef679c48fb76d9fb 8m23s bigbang istio https://repo1.dso.mil/big-bang/product/packages/servicemesh.git True Fetched revision: chart-release/2b02a51b7950ce21bac26403fa25d09e7e3f86c3 8m23s bigbang twistlock https://repo1.dso.mil/big-bang/product/packages/twistlock.git True Fetched revision: chart-release/faf038197291915713e0f213a4e35991e72f73f6 8m23s bigbang gatekeeper https://repo1.dso.mil/big-bang/product/packages/policy.git True Fetched revision: chart-release/1a5f32c8e7f672c3b5937b604e5f38eaa08ce246 8m23s bigbang monitoring https://repo1.dso.mil/big-bang/product/packages/monitoring.git True Fetched revision: release-v0.2.x/ca60bedcc106b95beb0bf9ccdc6e0e759e6fd6bf 8m23s bigbang cluster-auditor https://repo1.dso.mil/big-bang/product/packages/cluster-auditor.git True Fetched revision: chart-release/598c35670db0cbdb3a48063b2d558965afe73185 8m23s ```

7. Verify the packages get deployed.

   # Use watch since it take a long time to deploy
   watch kubectl get hr,deployments,po -A
   
   # Flux will not attempt to deploy a package until its dependencies are ready
   # All Helm Release resources and Pods
   Every 2.0s: kubectl get hr,deployments,po -A                                                                            localhost: Mon Nov  9 10:14:56 2020
   
   NAMESPACE     NAME                                                          READY    STATUS                                                 AGE
   bigbang       helmrelease.helm.toolkit.fluxcd.io/bigbang                    True     Release reconciliation succeeded                       64s
   bigbang       helmrelease.helm.toolkit.fluxcd.io/gatekeeper                 True     Release reconciliation succeeded                       62s
   bigbang       helmrelease.helm.toolkit.fluxcd.io/eck-operator               False    dependency 'bigbang/gatekeeper' is not ready           62s
   bigbang       helmrelease.helm.toolkit.fluxcd.io/istio-operator             Unknown  Reconciliation in progress                             62s
   bigbang       helmrelease.helm.toolkit.fluxcd.io/istio                      False    dependency 'bigbang/istio-operator' is not ready       62s
   bigbang       helmrelease.helm.toolkit.fluxcd.io/efk                        False    dependency 'bigbang/eck-operator' is not ready         62s
   bigbang       helmrelease.helm.toolkit.fluxcd.io/logging-operator           False    dependency 'bigbang/gatekeeper' is not ready           62s
   bigbang       helmrelease.helm.toolkit.fluxcd.io/twistlock                  False    dependency 'bigbang/gatekeeper' is not ready           62s
   bigbang       helmrelease.helm.toolkit.fluxcd.io/cluster-auditor-policies   False    dependency 'bigbang/gatekeeper' is not ready           62s
   bigbang       helmrelease.helm.toolkit.fluxcd.io/cluster-auditor            False    dependency 'bigbang/gatekeeper' is not ready           62s
   bigbang       helmrelease.helm.toolkit.fluxcd.io/certmanager                True     Release reconciliation succeeded                       62s
   bigbang       helmrelease.helm.toolkit.fluxcd.io/monitoring                 False    dependency 'bigbang/gatekeeper' is not ready           62s
   
   NAMESPACE           NAME                                            READY   UP-TO-DATE   AVAILABLE   AGE
   kube-system         deployment.apps/local-path-provisioner          1/1     1            1           4m48s
   kube-system         deployment.product/packagesdns                         1/1     1            1           4m48s
   flux-system         deployment.apps/helm-controller                 1/1     1            1           4m6s
   flux-system         deployment.apps/notification-controller         1/1     1            1           4m6s
   flux-system         deployment.apps/source-controller               1/1     1            1           4m7s
   flux-system         deployment.apps/kustomize-controller            1/1     1            1           4m7s
   gatekeeper-system   deployment.apps/gatekeeper-controller-manager   1/1     1            1           2m8s
   gatekeeper-system   deployment.apps/gatekeeper-audit                1/1     1            1           2m8s
   istio-operator      deployment.apps/istio-operator                  0/1     1            0           8s
   
   NAMESPACE           NAME                                                 READY   STATUS              RESTARTS   AGE
   kube-system         pod/local-path-provisioner-6d59f47c7-s6rln           1/1     Running             0          4m36s
   kube-system         pod/coredns-7944c66d8d-flk4p                         1/1     Running             0          4m36s
   flux-system         pod/helm-controller-578cdbcd8b-tjzs7                 1/1     Running             0          4m6s
   flux-system         pod/notification-controller-7c59d85f77-92ckv         1/1     Running             0          4m6s
   flux-system         pod/source-controller-7d6f889df9-f888j               1/1     Running             0          4m7s
   flux-system         pod/kustomize-controller-5cfb78859c-n85xn            1/1     Running             0          4m6s
   gatekeeper-system   pod/gatekeeper-controller-manager-5b9cf6c85d-cqd8t   1/1     Running             0          2m8s
   gatekeeper-system   pod/gatekeeper-audit-7db49c54d5-pwzwh                1/1     Running             0          2m8s
   istio-operator      pod/istio-operator-79f966cfc-rjhhc                   0/1     ContainerCreating   0          8s
   

8. Wait until all Helm Releases, Deployments, and Pods are ready. Be patient, this can take 15-30 minutes.

   The Git repositories are monitored periodically (default is 10m) for changes. If a change is detected, the configuration will be reconciled using Flux. The monitoring techniques above can be used to monitor the reconciliation.