hashicorp_consul.sh

gistfile1.txt

#!/bin/bash
### Deploying Hashicorp Consul on Kubernetes for Debian/Ubuntu based OS
## Baseline Guide: https://learn.hashicorp.com/tutorials/consul/kubernetes-deployment-guide
# Type of Deployment: Helm

### Minimum Requirements ###
## Three Worker Node Cluster (Tested on K0s, K3s, K8s)
## A Storage Backend (Tested on Ceph, OpenEBS, Local, Longhorn)
#
## The following base packages are required:
# Helm, Package Manager
curl -fsSL -o get_helm.sh https://raw.githubusercontent.com/helm/helm/main/scripts/get-helm-3 && \
chmod 700 get_helm.sh && \
./get_helm.sh && \
#
### Installation ###
## Set Variables:
# Set a StorageClass (kubectl get sc)
STORAGE=longhorn
# Set a temporary directory to store files generated by this script
mkdir /tmp/consul && export TMPDIR=/tmp/consul && \
# Install the Helm chart repo
helm repo add hashicorp https://helm.releases.hashicorp.com && helm repo update && \
# Create custom values file for Consul (Used as backend storage)
# Helm Chart Values Consul: https://github.com/hashicorp/consul-helm/blob/master/values.yaml
cat <<EOF >${TMPDIR}/config.yaml
syncCatalog:
  enabled: true
  default: true
  k8sAllowNamespaces: ['*']
  k8sDenyNamespaces: ['kube-system', 'kube-public']
server:
  resources:
    requests:
      memory: '512Mi'
      cpu: '500m'
    limits:
      memory: '512Mi'
      cpu: '500m'
  storageClass: '$STORAGE'
  storage: 2Gi
client:
  resources:
    requests:
      memory: '512Mi'
      cpu: '500m'
    limits:
      memory: '512Mi'
      cpu: '500m'
ui:
  enabled: true
connectInject:
  enabled: true
  default: false
controller:
  enabled: true
EOF
helm install consul hashicorp/consul -f ${TMPDIR}/config.yaml --namespace consul --create-namespace && \
# Wait until Consul is running
ROLLOUT_STATUS_CMD="kubectl rollout status -w --timeout=300s statefulset/consul-consul-server -n consul"
until $ROLLOUT_STATUS_CMD || [ $n -eq 300 ]; do
   $ROLLOUT_STATUS_CMD
   n=$((n + 1))
   sleep 5
done
# Cleanup
rm -r /tmp/consul