updated install instructions

Author: jeremycook123

README.md

@@ -3,5 +3,104 @@ This is used by the [Introduction to GitOps](https://cloudacademy.com/course/int
 
 ![GitOps Demo](./docs/GitOps1.png)
 
+**Updates**
+- Fri 4 Dec 2020: Updated and validate install instructions to work with latest versions of tools and Flux chart
+
 ## Fork Repo
-If you intend to watch the course and repeat the same instructions in your own environment, then you *must* fork this repository into your own GitHub account. The reason for this, is that you need to be the *owner* of the repo to be able to upload and configure a new *Deploy Key* within the *Settings* area of the repo. The new *Deploy Key* will contain the Flux operators SSH public key. 
+If you intend to watch the course and repeat the same instructions in your own environment, then you *must* fork this repository into your own GitHub account. The reason for this, is that you need to be the *owner* of the repo to be able to upload and configure a new *Deploy Key* within the *Settings* area of the repo. The new *Deploy Key* will contain the Flux operators SSH public key. 
+
+## GitOps - Flux Install Instructions 
+
+### TOOLS (versions)
+
+- helm (v3.4.0)
+- kubectl (1.19.3)
+- minikube (1.15.1)
+- k8s (v1.19.4)
+
+**NOTE**: Helm3 is easier and more secure - doesn't require the Tiller component/service to be installed in the K8s cluster (Helm2 did)
+
+### Step 1.
+
+Start a K8s cluster locally - only do this if you need a cluster
+
+```
+minikube start --memory=4g --kubernetes-version=v1.19.4
+```
+
+### Step 2.
+
+Use browser and open https://artifacthub.io/
+
+Search for "Flux" - click on the "flux" chart result - here you can review the install instructions, which follow.
+
+Run the following commands to install the "flux" chart
+
+```
+helm repo add flux https://charts.fluxcd.io
+helm repo update
+```
+
+```
+kubectl create ns flux
+kubectl create ns cloudacademy
+```
+
+```
+helm search repo flux
+```
+
+**NOTE**: replace the git.url parameter with YOUR FORKed copy - so that you can later set the SSH public key as a DeployKey within your own Github FORKed repo
+
+```
+helm install flux --set [email protected]:cloudacademy/gitops-demo --namespace flux flux/flux --version 1.6.0
+```
+
+**NOTE**: if needed you can perform a "helm upgrade" to change the Flux deployed chart's git.url like this:
+
+```
+helm upgrade -i flux fluxcd/flux --set [email protected]:myaccount/gitops-demo --namespace flux
+```
+
+Examine the rollout of Flux...
+
+```
+kubectl rollout status deployment flux -n flux
+```
+
+```
+kubectl get pods -n flux
+```
+
+```
+kubectl -n flux logs deployment/flux --follow
+```
+
+CTRL-C to exit previous command
+
+### Step 3.
+
+Retrieve SSH public key and then add as a DeployKey within your own Github FORKed repo:
+
+```
+kubectl -n flux logs deployment/flux | grep identity.pub | cut -d '"' -f2
+```
+
+### Step 4.
+
+Check to see that the gitops-demo resources have been automatically deployed by Flux into the cloudacademy namespace within the K8s cluster
+
+```
+kubectl get pods -n cloudacademy
+kubectl describe pod -n cloudacademy
+```
+
+```
+kubectl get pods -n cloudacademy --watch
+```
+
+CTRL-C to exit previous command
+
+```
+kubectl rollout status deployment frontend -n cloudacademy
+```