AWS CDK EC2 instance with EFS attached

attached_EFS.py

self.file_system.connections.allow_default_port_from(self.ec2_instance)

self.ec2_instance.user_data.add_commands(
    "yum check-update -y",
    "yum upgrade -y",
    "yum install -y amazon-efs-utils",
    "yum install -y nfs-utils",
    "file_system_id_1=" + self.file_system.file_system_id,
    "efs_mount_point_1=/mnt/efs/fs1",
    'mkdir -p "${efs_mount_point_1}"',
    'test -f "/sbin/mount.efs" && echo "${file_system_id_1}:/ ${efs_mount_point_1} efs defaults,_netdev" >> /etc/fstab || " + "echo "${file_system_id_1}.efs." + Stack.of(self).region + ".amazonaws.com:/ ${efs_mount_point_1} nfs4 nfsvers=4.1,rsize=1048576,wsize=1048576,hard,timeo=600,retrans=2,noresvport,_netdev 0 0" >> /etc/fstab',
    "mount -a -t efs,nfs4 defaults",
)

Actually this one is probably better:

  self.file_system.connections.allow_default_port_from(self.ec2_instance)

  self.ec2_instance.user_data.add_commands(
      "yum check-update -y",
      "yum upgrade -y",
      "yum install -y amazon-efs-utils",
      "yum install -y nfs-utils",
      "file_system_id_1=" + self.file_system.file_system_id,
      "efs_mount_point_1=/mnt/efs/fs1",
      'mkdir -p "${efs_mount_point_1}"',
      'sudo mount -t efs -o tls "${file_system_id_1}":/ "${efs_mount_point_1}"'
  )