02-07-helmfile.sh

##########################################
# Helmfile                               #
# How to manage Kubernetes Helm releases #
# https://youtu.be/qIJt8Iq8Zb0           #
##########################################

# Referenced videos:
# - K3d - How to run Kubernetes cluster locally using Rancher k3s: https://youtu.be/mCesuGk-Fks

#########
# Setup #
#########

git clone https://github.com/vfarcic/helmfile-demo

cd helmfile-demo

# Please watch https://youtu.be/mCesuGk-Fks if you are not familiar with k3d
# It could be any other k8s cluster with an Ingress controller
k3d cluster create --config k3d.yaml

# Install Helm

# Install `helmfile` from https://github.com/roboll/helmfile#installation

helm plugin install https://github.com/databus23/helm-diff

helm plugin install https://github.com/aslafy-z/helm-git

helm plugin install https://github.com/jkroepke/helm-secrets

##############################
# Defining a simple Helmfile #
##############################

cat helmfile-prometheus.yaml

helmfile \
    --file helmfile-prometheus.yaml \
    apply \
    --wait

#####################
# Updating releases #
#####################

cat helmfile-prometheus-rbac.yaml

helmfile \
    --interactive \
    --file helmfile-prometheus-rbac.yaml \
    apply \
    --wait

helmfile \
    --interactive \
    --file helmfile-prometheus-rbac.yaml \
    destroy

##############################
# Defining multiple-releases #
##############################

cat helmfile-multi.yaml

helmfile \
    --file helmfile-multi.yaml \
    apply \
    --wait

# If not using k3d, change the value to whatever is the base host
export BASE_HOST=localhost

helmfile \
    --file helmfile-multi.yaml \
    --interactive \
    apply \
    --wait

kubectl --namespace production \
    get ingresses

# Open devops-toolkit host

######################
# Applying templates #
######################

cat helmfile-multi.yaml

cat helmfile.yaml

helmfile --interactive apply --wait

#######################
# Destroying releases #
#######################

helmfile destroy

k3d cluster delete helmfile-demo