get-ecs-logs.sh

#!/bin/bash

AWS_PROFILE="example-profile"
LOG_GROUP="/ecs/example-task"
LOG_STREAM="ecs/container/abcdef1234567890"
FILE="logs.txt"
> "$FILE"

TOKEN=""

while : ; do
  if [ -z "$TOKEN" ]; then
    RESPONSE=$(aws logs get-log-events \
      --profile "$AWS_PROFILE" \
      --log-group-name "$LOG_GROUP" \
      --log-stream-name "$LOG_STREAM" \
      --start-from-head \
      --limit 10000 \
      --output json)
  else
    RESPONSE=$(aws logs get-log-events \
      --profile "$AWS_PROFILE" \
      --log-group-name "$LOG_GROUP" \
      --log-stream-name "$LOG_STREAM" \
      --next-token "$TOKEN" \
      --limit 10000 \
      --output json)
  fi

  echo "$RESPONSE" | jq -r '.events[] | "\(.timestamp): \(.message)"' >> "$FILE"

  NEXT_TOKEN=$(echo "$RESPONSE" | jq -r '.nextForwardToken')

  if [ "$NEXT_TOKEN" == "$TOKEN" ] || [ "$NEXT_TOKEN" == "null" ]; then
    break
  fi

  TOKEN="$NEXT_TOKEN"
done