grafana/scripts/grafana-server/wait-for-grafana

#!/usr/bin/env bash
set -eo pipefail

. scripts/grafana-server/variables

HOST=${HOST:-$DEFAULT_HOST}
PORT=${PORT:-$DEFAULT_PORT}

printf "Waiting for grafana-server to finish starting, host=%s, port=%s" "$HOST" "$PORT"

timeout=60
elapsed=0

while ! curl -s -f http://$HOST:$PORT/health > /dev/null 2>&1; do
  if [ $elapsed -ge $timeout ]; then
    printf "\nTimeout after %d seconds waiting for grafana-server to start\n" "$timeout"
    exit 1
  fi

  printf "."
  sleep 1
  elapsed=$((elapsed + 1))
done

printf "\n"