103 lines
2.1 KiB
Bash
103 lines
2.1 KiB
Bash
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#!/usr/bin/env bash
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set -e
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# bits of this were adapted from lxc-checkconfig
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# see also https://github.com/lxc/lxc/blob/lxc-1.0.2/src/lxc/lxc-checkconfig.in
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: ${CONFIG:=/proc/config.gz}
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: ${GREP:=zgrep}
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if [ ! -e "$CONFIG" ]; then
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echo >&2 "warning: $CONFIG does not exist, searching other paths for kernel config..."
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if [ -e "/boot/config-$(uname -r)" ]; then
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CONFIG="/boot/config-$(uname -r)"
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elif [ -e '/usr/src/linux/.config' ]; then
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CONFIG='/usr/src/linux/.config'
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else
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echo >&2 "error: cannot find kernel config"
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echo >&2 " try running this script again, specifying the kernel config:"
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echo >&2 " CONFIG=/path/to/kernel/.config $0"
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exit 1
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fi
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fi
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is_set() {
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$GREP "CONFIG_$1=[y|m]" $CONFIG > /dev/null
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}
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color() {
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color=
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prefix=
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if [ "$1" = 'bold' ]; then
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prefix='1;'
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shift
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fi
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case "$1" in
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green) color='32' ;;
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red) color='31' ;;
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gray) color='30' ;;
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reset) color='' ;;
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esac
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echo -en '\033['"$prefix$color"m
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}
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check_flag() {
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if is_set "$1"; then
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color green
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echo -n enabled
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else
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color bold red
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echo -n missing
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fi
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color reset
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}
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check_flags() {
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for flag in "$@"; do
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echo "- CONFIG_$flag: $(check_flag "$flag")"
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done
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}
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echo
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# TODO check that the cgroupfs hierarchy is properly mounted
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echo 'Generally Necessary:'
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flags=(
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NAMESPACES {NET,PID,IPC,UTS}_NS
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DEVPTS_MULTIPLE_INSTANCES
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CGROUPS CGROUP_DEVICE
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MACVLAN VETH BRIDGE
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IP_NF_TARGET_MASQUERADE NETFILTER_XT_MATCH_{ADDRTYPE,CONNTRACK}
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NF_NAT NF_NAT_NEEDED
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)
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check_flags "${flags[@]}"
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echo
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echo 'Optional Features:'
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flags=(
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MEMCG_SWAP
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RESOURCE_COUNTERS
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)
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check_flags "${flags[@]}"
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echo '- Storage Drivers:'
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{
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echo '- "aufs":'
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check_flags AUFS_FS | sed 's/^/ /'
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if ! is_set AUFS_FS && grep -q aufs /proc/filesystems; then
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echo " $(color bold gray)(note that some kernels include AUFS patches but not the AUFS_FS flag)$(color reset)"
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fi
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echo '- "btrfs":'
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check_flags BTRFS_FS | sed 's/^/ /'
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echo '- "devicemapper":'
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check_flags BLK_DEV_DM DM_THIN_PROVISIONING EXT4_FS | sed 's/^/ /'
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} | sed 's/^/ /'
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echo
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#echo 'Potential Future Features:'
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#check_flags USER_NS
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#echo
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