Merge pull request #28007 from justincormack/check-config-error

Make the check-config script return success or failure

contrib/check-config.sh

@@ -1,6 +1,8 @@
 #!/usr/bin/env bash
 set -e
 
+EXITCODE=0
+
 # bits of this were adapted from lxc-checkconfig
 # see also https://github.com/lxc/lxc/blob/lxc-1.0.2/src/lxc/lxc-checkconfig.in
 
@@ -90,12 +92,13 @@ check_flag() {
 		wrap_good "CONFIG_$1" 'enabled (as module)'
 	else
 		wrap_bad "CONFIG_$1" 'missing'
+		EXITCODE=1
 	fi
 }
 
 check_flags() {
 	for flag in "$@"; do
-		echo "- $(check_flag "$flag")"
+		echo -n "- "; check_flag "$flag"
 	done
 }
 
@@ -104,6 +107,7 @@ check_command() {
 		wrap_good "$1 command" 'available'
 	else
 		wrap_bad "$1 command" 'missing'
+		EXITCODE=1
 	fi
 }
 
@@ -112,6 +116,7 @@ check_device() {
 		wrap_good "$1" 'present'
 	else
 		wrap_bad "$1" 'missing'
+		EXITCODE=1
 	fi
 }
 
@@ -122,6 +127,7 @@ check_distro_userns() {
 		grep -q "user_namespace.enable=1" /proc/cmdline || {
 			# no user namespace support enabled
 			wrap_bad "  (RHEL7/CentOS7" "User namespaces disabled; add 'user_namespace.enable=1' to boot command line)"
+			EXITCODE=1
 		}
 	fi
 }
@@ -158,6 +164,7 @@ else
 	else
 		echo "$(wrap_bad 'cgroup hierarchy' 'nonexistent??')"
 	fi
+	EXITCODE=1
 	echo "    $(wrap_color '(see https://github.com/tianon/cgroupfs-mount)' yellow)"
 fi
 
@@ -175,6 +182,7 @@ if [ "$(cat /sys/module/apparmor/parameters/enabled 2>/dev/null)" = 'Y' ]; then
 		else
 			echo "$(wrap_color '(look for an "apparmor" package for your distribution)')"
 		fi
+		EXITCODE=1
 	fi
 fi
 
@@ -255,41 +263,56 @@ if ! is_set EXT4_FS || ! is_set EXT4_FS_POSIX_ACL || ! is_set EXT4_FS_SECURITY;
 fi
 
 echo '- Network Drivers:'
-{
-	echo '- "'$(wrap_color 'overlay' blue)'":'
-	check_flags VXLAN | sed 's/^/  /'
-	echo '    Optional (for encrypted networks):'
-	check_flags CRYPTO CRYPTO_AEAD CRYPTO_GCM CRYPTO_SEQIV CRYPTO_GHASH \
-	            XFRM XFRM_USER XFRM_ALGO INET_ESP INET_XFRM_MODE_TRANSPORT | sed 's/^/    /'
-	echo '- "'$(wrap_color 'ipvlan' blue)'":'
-	check_flags IPVLAN | sed 's/^/  /'
-	echo '- "'$(wrap_color 'macvlan' blue)'":'
-	check_flags MACVLAN DUMMY | sed 's/^/  /'
-} | sed 's/^/  /'
+echo '  - "'$(wrap_color 'overlay' blue)'":'
+check_flags VXLAN | sed 's/^/    /'
+echo '      Optional (for encrypted networks):'
+check_flags CRYPTO CRYPTO_AEAD CRYPTO_GCM CRYPTO_SEQIV CRYPTO_GHASH \
+            XFRM XFRM_USER XFRM_ALGO INET_ESP INET_XFRM_MODE_TRANSPORT | sed 's/^/      /'
+echo '  - "'$(wrap_color 'ipvlan' blue)'":'
+check_flags IPVLAN | sed 's/^/    /'
+echo '  - "'$(wrap_color 'macvlan' blue)'":'
+check_flags MACVLAN DUMMY | sed 's/^/    /'
+
+# only fail if no storage drivers available
+CODE=${EXITCODE}
+EXITCODE=0
+STORAGE=1
 
 echo '- Storage Drivers:'
-{
-	echo '- "'$(wrap_color 'aufs' blue)'":'
-	check_flags AUFS_FS | sed 's/^/  /'
-	if ! is_set AUFS_FS && grep -q aufs /proc/filesystems; then
-		echo "    $(wrap_color '(note that some kernels include AUFS patches but not the AUFS_FS flag)' bold black)"
-	fi
-
-	echo '- "'$(wrap_color 'btrfs' blue)'":'
-	check_flags BTRFS_FS | sed 's/^/  /'
-	check_flags BTRFS_FS_POSIX_ACL | sed 's/^/  /'
-
-	echo '- "'$(wrap_color 'devicemapper' blue)'":'
-	check_flags BLK_DEV_DM DM_THIN_PROVISIONING | sed 's/^/  /'
-
-	echo '- "'$(wrap_color 'overlay' blue)'":'
-	check_flags OVERLAY_FS | sed 's/^/  /'
+echo '  - "'$(wrap_color 'aufs' blue)'":'
+check_flags AUFS_FS | sed 's/^/    /'
+if ! is_set AUFS_FS && grep -q aufs /proc/filesystems; then
+	echo "      $(wrap_color '(note that some kernels include AUFS patches but not the AUFS_FS flag)' bold black)"
+fi
+[ "$EXITCODE" = 0 ] && STORAGE=0
+EXITCODE=0
+
+echo '  - "'$(wrap_color 'btrfs' blue)'":'
+check_flags BTRFS_FS | sed 's/^/    /'
+check_flags BTRFS_FS_POSIX_ACL | sed 's/^/    /'
+[ "$EXITCODE" = 0 ] && STORAGE=0
+EXITCODE=0
+
+echo '  - "'$(wrap_color 'devicemapper' blue)'":'
+check_flags BLK_DEV_DM DM_THIN_PROVISIONING | sed 's/^/    /'
+[ "$EXITCODE" = 0 ] && STORAGE=0
+EXITCODE=0
+
+echo '  - "'$(wrap_color 'overlay' blue)'":'
+check_flags OVERLAY_FS | sed 's/^/    /'
+[ "$EXITCODE" = 0 ] && STORAGE=0
+EXITCODE=0
+
+echo '  - "'$(wrap_color 'zfs' blue)'":'
+echo -n "    - "; check_device /dev/zfs
+echo -n "    - "; check_command zfs
+echo -n "    - "; check_command zpool
+[ "$EXITCODE" = 0 ] && STORAGE=0
+EXITCODE=0
+
+EXITCODE=$CODE
+[ "$STORAGE" = 1 ] && EXITCODE=1
 
-	echo '- "'$(wrap_color 'zfs' blue)'":'
-	echo "  - $(check_device /dev/zfs)"
-	echo "  - $(check_command zfs)"
-	echo "  - $(check_command zpool)"
-} | sed 's/^/  /'
 echo
 
 check_limit_over()
@@ -297,6 +320,7 @@ check_limit_over()
 	if [ $(cat "$1") -le "$2" ]; then
 		wrap_bad "- $1" "$(cat $1)"
 		wrap_color "    This should be set to at least $2, for example set: sysctl -w kernel/keys/root_maxkeys=1000000" bold black
+		EXITCODE=1
 	else
 		wrap_good "- $1" "$(cat $1)"
 	fi
@@ -305,3 +329,5 @@ check_limit_over()
 echo 'Limits:'
 check_limit_over /proc/sys/kernel/keys/root_maxkeys 10000
 echo
+
+exit $EXITCODE