Install Helm + Flux

Flux Architecture:

Flux Architecture

Create git repository which will be used by Flux in GitHub:

hub create -d "Flux repository for k8s-flux-istio-gitlab-harbor" -h "https://ruzickap.github.io/k8s-flux-istio-gitlab-harbor/" ruzickap/k8s-flux-repository

Output:

A git remote named 'origin' already exists and is set to push to 'ssh://git@github.com/ruzickap/k8s-flux-istio-gitlab-harbor.git'.
https://github.com/ruzickap/k8s-flux-repository

Clone newly create git repository:

if [ ! -n "$(grep "^github.com " ~/.ssh/known_hosts)" ]; then ssh-keyscan github.com >> ~/.ssh/known_hosts 2>/dev/null; fi
git config --global user.email "petr.ruzicka@gmail.com"
git -C tmp clone git@github.com:ruzickap/k8s-flux-repository.git

Output:

Cloning into 'k8s-flux-repository'...
warning: You appear to have cloned an empty repository.

Create initial flux repository structure and add it into the git repository:

cp -v files/flux-repository/README.md tmp/k8s-flux-repository/
mkdir -v tmp/k8s-flux-repository/{namespaces,releases,workloads}

git -C tmp/k8s-flux-repository add .
git -C tmp/k8s-flux-repository commit -m "Initial commit"
git -C tmp/k8s-flux-repository push -q

Output:

'files/flux-repository/README.md' -> 'tmp/k8s-flux-repository/README.md'
mkdir: created directory 'tmp/k8s-flux-repository/namespaces'
mkdir: created directory 'tmp/k8s-flux-repository/releases'
mkdir: created directory 'tmp/k8s-flux-repository/workloads'
[master (root-commit) 01ec748] Initial commit
 1 file changed, 1 insertion(+)
 create mode 100644 README.md

Install Helm

Install Helm binary:

curl -s https://raw.githubusercontent.com/helm/helm/master/scripts/get | bash -s -- --version v2.14.3

Output:

Helm v2.14.3 is already v2.14.3
Run 'helm init' to configure helm.

Create a service account and a cluster role binding for Tiller:

kubectl -n kube-system create sa tiller

kubectl create clusterrolebinding tiller-cluster-rule \
    --clusterrole=cluster-admin \
    --serviceaccount=kube-system:tiller

Output:

serviceaccount/tiller created
clusterrolebinding.rbac.authorization.k8s.io/tiller-cluster-rule created

Deploy Tiller in kube-system namespace:

helm init --skip-refresh --upgrade --service-account tiller --history-max 10 --wait

Output:

Creating /home/pruzicka/.helm
Creating /home/pruzicka/.helm/repository
Creating /home/pruzicka/.helm/repository/cache
Creating /home/pruzicka/.helm/repository/local
Creating /home/pruzicka/.helm/plugins
Creating /home/pruzicka/.helm/starters
Creating /home/pruzicka/.helm/cache/archive
Creating /home/pruzicka/.helm/repository/repositories.yaml
Adding stable repo with URL: https://kubernetes-charts.storage.googleapis.com
Adding local repo with URL: http://127.0.0.1:8879/charts
$HELM_HOME has been configured at /home/pruzicka/.helm.

Tiller (the Helm server-side component) has been installed into your Kubernetes Cluster.

Please note: by default, Tiller is deployed with an insecure 'allow unauthenticated users' policy.
To prevent this, run `helm init` with the --tiller-tls-verify flag.
For more information on securing your installation see: https://docs.helm.sh/using_helm/#securing-your-helm-installation

Check if the tiller was installed properly:

kubectl get pods -l app=helm -n kube-system

Output:

NAME                             READY   STATUS    RESTARTS   AGE
tiller-deploy-7b8b4499b5-cs6zf   1/1     Running   0          11s

Install Flux

Add the Flux repository:

helm repo add fluxcd https://charts.fluxcd.io
helm update

Output:

"fluxcd" has been added to your repositories
Command "update" is deprecated, use 'helm repo update'

Hang tight while we grab the latest from your chart repositories...
...Skip local chart repository
...Successfully got an update from the "fluxcd" chart repository
...Successfully got an update from the "stable" chart repository
Update Complete.

Apply the Helm Release CRD:

kubectl apply -f https://raw.githubusercontent.com/fluxcd/flux/helm-0.10.1/deploy-helm/flux-helm-release-crd.yaml

Output:

customresourcedefinition.apiextensions.k8s.io/helmreleases.flux.weave.works created

Install Flux:

helm install --name flux --namespace flux --wait --version 0.12.0 fluxcd/flux \
  --set git.email="petr.ruzicka@gmail.com" \
  --set git.url=git@github.com:ruzickap/k8s-flux-repository \
  --set git.user="Flux" \
  --set helmOperator.create=true \
  --set helmOperator.createCRD=false \
  --set registry.insecureHosts="harbor.${MY_DOMAIN}" \
  --set registry.pollInterval="10s" \
  --set syncGarbageCollection.enabled=true

Output:

NAME:   flux
LAST DEPLOYED: Thu Aug 29 09:39:10 2019
NAMESPACE: flux
STATUS: DEPLOYED

RESOURCES:
==> v1/ConfigMap
NAME              DATA  AGE
flux-kube-config  1     16s

==> v1/Deployment
NAME                READY  UP-TO-DATE  AVAILABLE  AGE
flux                1/1    1           1          16s
flux-helm-operator  1/1    1           1          16s
flux-memcached      1/1    1           1          16s

==> v1/Pod(related)
NAME                                 READY  STATUS   RESTARTS  AGE
flux-bbb76576-8clvg                  1/1    Running  0         16s
flux-helm-operator-6877b9f564-rt5rl  1/1    Running  0         16s
flux-memcached-88db78d9d-vnrl7       1/1    Running  0         16s

==> v1/Secret
NAME             TYPE    DATA  AGE
flux-git-deploy  Opaque  1     16s

==> v1/Service
NAME            TYPE       CLUSTER-IP      EXTERNAL-IP  PORT(S)    AGE
flux            ClusterIP  100.70.220.201  <none>       3030/TCP   16s
flux-memcached  ClusterIP  100.64.195.153  <none>       11211/TCP  16s

==> v1/ServiceAccount
NAME  SECRETS  AGE
flux  1        16s

==> v1beta1/ClusterRole
NAME  AGE
flux  16s

==> v1beta1/ClusterRoleBinding
NAME  AGE
flux  16s


NOTES:
Get the Git deploy key by either (a) running

  kubectl -n flux logs deployment/flux | grep identity.pub | cut -d '"' -f2

or by (b) installing fluxctl through
https://github.com/weaveworks/flux/blob/master/docs/references/fluxctl.md#installing-fluxctl
and running:

  fluxctl identity

Install fluxcli:

sudo wget -q -c https://github.com/fluxcd/flux/releases/download/1.14.0/fluxctl_linux_amd64 -O /usr/local/bin/fluxctl
sudo chmod a+x /usr/local/bin/fluxctl

Set the namespace (flux) where flux was installed for running fluxctl:

export FLUX_FORWARD_NAMESPACE=flux

Obtain the ssh public key through fluxctl:

fluxctl identity
if [ -x /usr/bin/chromium-browser ]; then chromium-browser https://github.com/ruzickap/k8s-flux-repository/settings/keys/new & fi

Output:

ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQCyGvcJPcFxvsc9SHtJiOt7G6pvNQgmcf+PIIfy6PoEvXK2naXmKw68+dtKeIoMzvp63QxoNB+B6qamMbkWqaVCjS4glAXKmf68k/eCazcPNZaQRmL/YUmgmyZ8AF02fDmM/RQMz/2hUtUE6UYs/T5vYUdDwYb09nOmVMgclY6jbmQ4b0OgG18p6RnNYtJ4wysC6+wEoy5xVljKWRE03UxD3pJbVdk5KPcJ/mnX44tUwU/oE/Ezz7LaMjVXnXns8zKu3LOAIeolcCFVJUbUMQhOuvwrXp+Sag1VV3OG4Uy6P3/0wIajEumzHO4GvpAEJ1F1Ny4b692wP/TdUX/WWAIr

Add the ssh key to the GitHub "https://github.com/ruzickap/k8s-flux-repository" -> "Settings" -> "Deploy keys" -> "Add new" -> "Allow write access"

Flux logo