Author: cperciva
Date: Sun May 17 21:54:59 2020
New Revision: 361143
URL: https://svnweb.freebsd.org/changeset/base/361143
Log:
Add /etc/autofs/special_efs to EC2 AMIs
Since Amazon Elastic File System is only available within AWS, it seems
more appropriate to have this added only in EC2 AMIs rather than
"polluting" non-EC2 images with it.
Reviewed by: gjb
MFC after: 7 days
Relnotes: Amazon EFS filesystems can be automounted by enabling autofs
and placing "/efs -efs" into /etc/auto_master.
Sponsored by: https://www.patreon.com/cperciva
Differential Revision: https://reviews.freebsd.org/D24791
Modified:
head/release/tools/ec2.conf
Modified: head/release/tools/ec2.conf
==============================================================================
--- head/release/tools/ec2.conf Sun May 17 21:29:45 2020 (r361142)
+++ head/release/tools/ec2.conf Sun May 17 21:54:59 2020 (r361143)
@@ -113,6 +113,23 @@ vm_extra_pre_umount() {
-e '1,/^#server/s/^#server.*/server 169.254.169.123 iburst/' \
${DESTDIR}/etc/ntp.conf
+ # Provide a map for accessing Elastic File System mounts
+ cat > ${DESTDIR}/etc/autofs/special_efs <<'EOF'
+#!/bin/sh
+
+if [ $# -eq 0 ]; then
+ # No way to know which EFS filesystems exist and are
+ # accessible to this EC2 instance.
+ exit 0
+fi
+
+# Provide instructions on how to mount the requested filesystem.
+FS=$1
+REGION=`fetch -qo-
http://169.254.169.254/latest/meta-data/placement/availability-zone | sed -e
's/[a-z]$//'`
+echo "-nfsv4,minorversion=1,oneopenown ${FS}.efs.${REGION}.amazonaws.com:/"
+EOF
+ chmod 755 ${DESTDIR}/etc/autofs/special_efs
+
# The first time the AMI boots, the installed "first boot" scripts
# should be allowed to run:
# * ec2_configinit (download and process EC2 user-data)
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