Add get started guide

docs/get-started/index.md

+# Get started with GitOps Toolkit
+
+## Prerequisites
+
+* Kubernetes >= 1.14
+* kubectl >= 1.18
+* git
+
+You will need to have Kubernetes set up.
+For a quick local test, you can use `minikube`, `kubeadm` or `kind`.
+Any other Kubernetes setup will work as well though.
+
+In order to follow the guide you'll need a GitHub account and a 
+[personal access token](https://help.github.com/en/github/authenticating-to-github/creating-a-personal-access-token-for-the-command-line)
+that can create repositories.
+
+## Install the toolkit CLI
+
+To install the latest `tk` release run:
+
+```bash
+curl -s https://raw.githubusercontent.com/fluxcd/toolkit/master/install/tk.sh | sudo bash
+```
+
+The install script downloads the tk binary to `/usr/local/bin`.
+
+Binaries for macOS and Linux AMD64 are available for download on the 
+[release page](https://github.com/fluxcd/toolkit/releases).
+
+To configure your shell to load tk completions add to your bash profile:
+
+```sh
+# ~/.bashrc or ~/.bash_profile
+. <(tk completion)
+```
+
+## Bootstrap 
+
+Export your GitHub personal access token with:
+
+```sh
+export GITHUB_TOKEN=<your-token>
+```
+
+The bootstrap command creates a GitHub repository if one doesn't exist and
+commits the toolkit components manifests to the master branch.
+Then it configures the target cluster to synchronize with the repository.
+If the toolkit components are present on the cluster,
+the bootstrap command will perform an upgrade if needed.
+
+```sh
+tk bootstrap github --owner=<your-github-username> --repository=<repo-name> --personal
+```
+
+If you wish to create the repository under a GitHub organization:
+
+```sh
+tk bootstrap github \
+  --owner=<organization> \
+  --repository=<repo-name> \
+  --team=<team1-slug> \
+  --team=<team2-slug> \
+  --version=v0.0.1-beta.2
+```
+
+Example output:
+
+```text
+$ tk bootstrap github --owner=gitopsrun --repository=fleet-infra --path=dev-cluster --team=devs
+
+► connecting to github.com
+✔ repository created
+✔ devs team access granted
+✔ repository cloned
+✚ generating manifests
+✔ components manifests pushed
+► installing components in gitops-system namespace
+namespace/gitops-system created
+customresourcedefinition.apiextensions.k8s.io/gitrepositories.source.fluxcd.io created
+customresourcedefinition.apiextensions.k8s.io/helmcharts.source.fluxcd.io created
+customresourcedefinition.apiextensions.k8s.io/helmrepositories.source.fluxcd.io created
+customresourcedefinition.apiextensions.k8s.io/kustomizations.kustomize.fluxcd.io created
+customresourcedefinition.apiextensions.k8s.io/profiles.kustomize.fluxcd.io created
+role.rbac.authorization.k8s.io/crd-controller-gitops-system created
+rolebinding.rbac.authorization.k8s.io/crd-controller-gitops-system created
+clusterrolebinding.rbac.authorization.k8s.io/cluster-reconciler-gitops-system created
+service/source-controller created
+deployment.apps/kustomize-controller created
+deployment.apps/source-controller created
+networkpolicy.networking.k8s.io/deny-ingress created
+Waiting for deployment "source-controller" rollout to finish: 0 of 1 updated replicas are available...
+deployment "source-controller" successfully rolled out
+deployment "kustomize-controller" successfully rolled out
+✔ install completed
+► configuring deploy key
+✔ deploy key configured
+► generating sync manifests
+✔ sync manifests pushed
+► applying sync manifests
+◎ waiting for cluster sync
+✔ bootstrap finished
+```
+
+If you prefer GitLab, export `GITLAB_TOKEN` env var and use the command `tk bootstrap gitlab`.
+
+## Create a GitOps workflow
+
+Clone the repository with:
+
+```sh
+git clone https://github.com/gitopsrun/fleet-infra
+cd fleet-infra
+```
+
+Create a git source pointing to a public repository:
+
+```sh
+tk create source git webapp \
+  --url=https://github.com/stefanprodan/podinfo \
+  --branch=master \
+  --interval=30s \
+  --export > ./dev-cluster/webapp-source.yaml
+```
+
+Create a kustomization for synchronizing the common manifests on the cluster:
+
+```sh
+tk create kustomization webapp-common \
+  --source=webapp \
+  --path="./deploy/webapp/common" \
+  --prune=true \
+  --validate=client \
+  --interval=1h \
+  --export > ./dev-cluster/webapp-common.yaml
+```
+
+Create a kustomization for the backend service that depends on common: 
+
+```sh
+tk create kustomization webapp-backend \
+  --depends-on=webapp-common \
+  --source=webapp \
+  --path="./deploy/webapp/backend" \
+  --prune=true \
+  --validate=client \
+  --interval=10m \
+  --health-check="Deployment/backend.webapp" \
+  --health-check-timeout=2m \
+  --export > ./dev-cluster/webapp-backend.yaml
+```
+
+Create a kustomization for the frontend service that depends on backend: 
+
+```sh
+tk create kustomization webapp-frontend \
+  --depends-on=webapp-backend \
+  --source=webapp \
+  --path="./deploy/webapp/frontend" \
+  --prune=true \
+  --validate=client \
+  --interval=10m \
+  --health-check="Deployment/frontend.webapp" \
+  --health-check-timeout=2m \
+  --export > ./dev-cluster/webapp-frontend.yaml
+```
+
+Push changes to origin:
+
+```sh
+git add -A && git commit -m "add webapp" && git push
+```
+
+In about 30s the synchronization should start:
+
+```text
+$ watch tk get kustomizations
+
+✔ gitops-system last applied revision master/35d5765a1acb9e9ce66cad7274c6fe03eee1e8eb
+✔ webapp-backend reconciling
+✔ webapp-common last applied revision master/f43f9b2eb6766e07f318d266a99d2ec7c940b0cf
+✗ webapp-frontend dependency 'gitops-system/webapp-backend' is not ready
+```
+
+When the synchronization finishes you can check that the webapp services are running:
+
+```text
+$ kubectl -n webapp get deployments,services
+
+NAME                       READY   UP-TO-DATE   AVAILABLE   AGE
+deployment.apps/backend    1/1     1            1           4m1s
+deployment.apps/frontend   1/1     1            1           3m31s
+
+NAME               TYPE        CLUSTER-IP    EXTERNAL-IP   PORT(S)             AGE
+service/backend    ClusterIP   10.52.10.22   <none>        9898/TCP,9999/TCP   4m1s
+service/frontend   ClusterIP   10.52.9.85    <none>        80/TCP              3m31s
+```
+

mkdocs.yml

@@ -35,8 +35,8 @@ markdown_extensions:
   - pymdownx.tabbed
 
 nav:
-  - Introduction: introduction.md
-  - CLI:
+  - Get Started: get-started/index.md
+  - tk CLI:
     - Bootstrap: cmd/tk_bootstrap.md
     - Check: cmd/tk_check.md
     - Create: cmd/tk_create.md