a simple check to register passing, warn, critical, with consul using http api

simple_check.sh

#!/usr/bin/env bash

# Assign service variables
CONSUL_URL=
CHECK_ENDPOINT=
CONSUL_DC="dc1"
NODE_NAME="$(hostname -f)"
NODE_ADDRESS="$(hostname -I| awk '{print $1}')"
SERVICE_ID="Redis1"
SERVICE_NAME="Redis"
SERVICE_PORT=6379
CHECK_ID="service:$SERVICE_NAME"
CHECK_NAME="Redis health check"
CHECK_NOTES="Script based health check"

# Actual Check
if [ $(curl -sI $CHECK_ENDPOINT| head -1 | awk '{print $2}') -eq 200 ]; then
	CHECK_RESULT="passing"
else
	CHECK_RESULT="critical"
fi

# Payload
read -r -d '' CONSUL_JSON <<EOF
{
  "Datacenter": "$CONSUL_DC",
  "Node": "$NODE_NAME",
  "Address": "$NODE_ADDRESS",
  "TaggedAddresses": {
    "lan": "$NODE_ADDRESS"
  },
  "Service": {
    "ID": "$SERVICE_ID",
    "Service": "$SERVICE_NAME",
    "Tags": [
      "master",
      "v1"
    ],
    "Address": "$NODE_ADDRESS",
    "Port": $SERVICE_PORT
  },
  "Check": {
    "Node": "$NODE_NAME",
    "CheckID": "$CHECK_ID",
    "Name": "$CHECK_NAME",
    "Notes": "$CHECK_NOTES",
    "Status": "$CHECK_RESULT",
    "ServiceID": "$SERVICE_ID"
  }
}
EOF

# Notify Consul
curl -X PUT -d "$CONSUL_JSON" http://$CONSUL_URL/v1/catalog/register