Add awslogs logging for PaaS

scripts/run_app_paas.sh

@@ -0,0 +1,87 @@
+#!/bin/bash
+
+set -e -o pipefail
+
+function check_params {
+  if [ -z "${NOTIFY_APP_NAME}" ]; then
+    echo "You must set NOTIFY_APP_NAME"
+    exit 1
+  fi
+
+  if [ -z "${CW_APP_NAME}" ]; then
+    CW_APP_NAME=${NOTIFY_APP_NAME}
+  fi
+}
+
+function configure_aws_logs {
+  aws configure set plugins.cwlogs cwlogs
+
+  export AWS_ACCESS_KEY_ID=$(echo ${VCAP_SERVICES} | jq -r '.["user-provided"][]|select(.name=="notify-aws")|.credentials.aws_access_key_id')
+  export AWS_SECRET_ACCESS_KEY=$(echo ${VCAP_SERVICES} | jq -r '.["user-provided"][]|select(.name=="notify-aws")|.credentials.aws_secret_access_key')
+
+  cat > /home/vcap/app/awslogs.conf << EOF
+[general]
+state_file = /home/vcap/logs/awslogs-state
+
+[/home/vcap/logs/app-stdout.log]
+file = /home/vcap/logs/app-stdout.log*
+log_group_name = paas-${CW_APP_NAME}-application
+log_stream_name = {hostname}-stdout
+
+[/home/vcap/logs/app-stderr.log]
+file = /home/vcap/logs/app-stderr.log*
+log_group_name = paas-${CW_APP_NAME}-application
+log_stream_name = {hostname}-stderr
+EOF
+}
+
+function on_exit {
+  echo "Terminating application process with pid ${APP_PID}"
+  kill ${APP_PID} || true
+  while (kill -0 ${APP_PID} 2&>/dev/null); do
+    echo "Application is still running.."
+    sleep 1
+  done
+  echo "Application process exited, waiting 10 seconds"
+  sleep 10
+  echo "Terminating remaining subprocesses.."
+  kill 0
+}
+
+function start_appplication {
+  exec "$@" 2>/home/vcap/logs/app-stderr.log | while read line; do echo $line; echo $line >> /home/vcap/logs/app-stdout.log.`date +%Y-%m-%d`; done &
+  LOGGER_PID=$!
+  APP_PID=`jobs -p`
+  echo "Logger process pid: ${LOGGER_PID}"
+  echo "Application process pid: ${APP_PID}"
+}
+
+function start_aws_logs_agent {
+  exec aws logs push --region eu-west-1 --config-file /home/vcap/app/awslogs.conf &
+  AWSLOGS_AGENT_PID=$!
+  echo "AWS logs agent pid: ${AWSLOGS_AGENT_PID}"
+}
+
+function run {
+  while true; do
+    kill -0 ${APP_PID} 2&>/dev/null || break
+    kill -0 ${LOGGER_PID} 2&>/dev/null || break
+    kill -0 ${AWSLOGS_AGENT_PID} 2&>/dev/null || start_aws_logs_agent
+    sleep 1
+  done
+}
+
+echo "Run script pid: $$"
+
+check_params
+
+trap "on_exit" EXIT
+
+configure_aws_logs
+
+# The application has to start first!
+start_appplication "$@"
+
+start_aws_logs_agent
+
+run