mirror of https://github.com/k3s-io/k3s
Erik Wilson
5 years ago
committed by
GitHub
5 changed files with 520 additions and 0 deletions
@ -0,0 +1,490 @@
|
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#!/bin/sh |
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set -e |
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EXITCODE=0 |
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|
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# rancher/k3s modified from |
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# https://github.com/moby/moby/blob/c831882/contrib/check-config.sh |
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|
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# bits of this were adapted from lxc-checkconfig for moby |
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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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uname=$(uname -r) |
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possibleConfigs=" |
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/proc/config.gz |
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/boot/config-${uname} |
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/boot/config-${uname##*-} |
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/usr/src/linux-${uname}/.config |
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/usr/src/linux/.config |
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" |
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if [ $# -gt 0 ]; then |
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CONFIG="$1" |
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fi |
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if ! command -v zgrep >/dev/null 2>&1; then |
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zgrep() { |
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zcat "$2" | grep "$1" |
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} |
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fi |
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configFormat=gz |
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dogrep() { |
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if [ "$configFormat" = "gz" ]; then |
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zgrep "$1" "$2" |
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else |
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grep "$1" "$2" |
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fi |
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} |
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|
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kernelVersion="$(uname -r)" |
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kernelMajor="${kernelVersion%%.*}" |
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kernelMinor="${kernelVersion#$kernelMajor.}" |
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kernelMinor="${kernelMinor%%.*}" |
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is_set() { |
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dogrep "CONFIG_$1=[y|m]" "$CONFIG" > /dev/null |
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} |
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is_set_in_kernel() { |
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dogrep "CONFIG_$1=y" "$CONFIG" > /dev/null |
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} |
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is_set_as_module() { |
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dogrep "CONFIG_$1=m" "$CONFIG" > /dev/null |
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} |
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|
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color() { |
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codes= |
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if [ "$1" = 'bold' ]; then |
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codes=1 |
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shift |
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fi |
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if [ "$#" -gt 0 ]; then |
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code= |
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case "$1" in |
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# see https://en.wikipedia.org/wiki/ANSI_escape_code#Colors |
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black) code=30 ;; |
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red) code=31 ;; |
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green) code=32 ;; |
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yellow) code=33 ;; |
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blue) code=34 ;; |
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magenta) code=35 ;; |
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cyan) code=36 ;; |
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white) code=37 ;; |
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esac |
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if [ "$code" ]; then |
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[ "$codes" ] && codes="${codes};" |
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codes="${codes}${code}" |
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fi |
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fi |
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printf '\033['"$codes"'m' |
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} |
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wrap_color() { |
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text="$1" |
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shift |
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color "$@" |
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echo -n "$text" |
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color reset |
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echo |
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} |
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|
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wrap_good() { |
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echo "$(wrap_color "$1" white): $(wrap_color "$2" green)" |
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} |
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wrap_bad() { |
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echo "$(wrap_color "$1" bold): $(wrap_color "$2" bold red)" |
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} |
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wrap_warn() { |
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echo "$(wrap_color "$1" bold): $(wrap_color "$2" bold yellow)" |
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} |
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warning() { |
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wrap_color >&2 "$*" yellow |
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} |
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check_flag() { |
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if is_set_in_kernel "$1"; then |
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wrap_good "CONFIG_$1" 'enabled' |
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elif is_set_as_module "$1"; then |
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wrap_good "CONFIG_$1" 'enabled (as module)' |
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else |
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if [ "$IS_ERROR" = 1 ]; then |
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wrap_bad "CONFIG_$1" 'missing' |
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EXITCODE=1 |
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else |
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wrap_warn "CONFIG_$1" 'missing' |
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fi |
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fi |
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} |
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check_flags() { |
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for flag in "$@"; do |
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echo -n "- "; check_flag "$flag" |
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done |
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} |
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check_command() { |
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if command -v "$1" >/dev/null 2>&1; then |
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wrap_good "$1 command" 'available' |
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else |
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wrap_bad "$1 command" 'missing' |
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EXITCODE=1 |
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fi |
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} |
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check_device() { |
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if [ -c "$1" ]; then |
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wrap_good "$1" 'present' |
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else |
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wrap_bad "$1" 'missing' |
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EXITCODE=1 |
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fi |
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} |
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check_distro_userns() { |
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[ -s /etc/os-release ] || return 0 |
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source /etc/os-release 2>/dev/null || true |
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if ( echo "${ID}" | grep -q -E '^(centos|rhel)$' ) && \ |
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( echo "${VERSION_ID}" | grep -q -E '^7' ); then |
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# this is a CentOS7 or RHEL7 system |
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if ! grep -q "user_namespace.enable=1" /proc/cmdline; then |
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# no user namespace support enabled |
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wrap_bad " (RHEL7/CentOS7" "User namespaces disabled; add 'user_namespace.enable=1' to boot command line)" |
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EXITCODE=1 |
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fi |
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fi |
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} |
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# --- |
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echo |
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{ |
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BINDIR=$(dirname "$0") |
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cd $BINDIR |
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echo "Verifying binaries in $BINDIR:" |
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if [ -s .sha256sums ]; then |
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sumsTemp=$(mktemp) |
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if sha256sum -c .sha256sums >$sumsTemp 2>&1; then |
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wrap_good '- sha256sum' 'good' |
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else |
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wrap_bad '- sha256sum' 'does not match' |
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cat $sumsTemp | sed -e 's/^/ ... /' |
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EXITCODE=1 |
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fi |
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rm -f $sumsTemp |
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else |
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wrap_warn '- sha256sum' 'sha256sums unavailable' |
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fi |
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linkFail=0 |
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if [ -s .links ]; then |
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while read file link; do |
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if [ "$(readlink $file)" != "$link" ]; then |
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wrap_bad '- links' "$file should link to $link" |
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linkFail=1 |
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fi |
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done <.links |
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if [ $linkFail -eq 0 ]; then |
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wrap_good '- links' 'good' |
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else |
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EXITCODE=1 |
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fi |
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else |
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wrap_warn '- links' 'link list unavailable' |
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fi |
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cd - >/dev/null |
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} |
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echo |
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{ |
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version_ge() { |
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[ "$1" = "$2" ] || [ "$(printf '%s\n' "$@" | sort -V | head -n 1)" != "$1" ] |
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} |
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echo "System:" |
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iptablesInfo=$(iptables --version) |
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iptablesVersion=$(echo $iptablesInfo | awk '{ print $2 }') |
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if version_ge $iptablesVersion v1.8.0; then |
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iptablesMode=$(echo $iptablesInfo | awk '{ print $3 }') |
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if [ "$iptablesMode" != "(legacy)" ]; then |
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wrap_bad "- $iptablesInfo" 'should be older than v1.8.0 or in legacy mode' |
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EXITCODE=1 |
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else |
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wrap_good "- $iptablesInfo" 'ok' |
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fi |
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else |
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wrap_good "- $iptablesInfo" 'older than v1.8' |
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fi |
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totalSwap=$(free | grep -i '^swap:' | awk '{ print $2 }') |
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if [ "$totalSwap" != "0" ]; then |
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wrap_warn '- swap' 'should be disabled' |
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else |
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wrap_good '- swap' 'disabled' |
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fi |
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if ip route | grep -v cni0 | grep -q -E '^10\.(42|43)\.'; then |
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wrap_warn '- routes' 'default CIDRs 10.42.0.0/16 or 10.43.0.0/16 already routed' |
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else |
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wrap_good '- routes' 'ok' |
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fi |
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} |
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echo |
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{ |
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check_limit_over() |
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{ |
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if [ "$(cat "$1")" -le "$2" ]; then |
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wrap_bad "- $1" "$(cat "$1")" |
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wrap_color " This should be set to at least $2, for example set: sysctl -w kernel/keys/root_maxkeys=1000000" bold black |
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EXITCODE=1 |
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else |
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wrap_good "- $1" "$(cat "$1")" |
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fi |
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} |
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echo 'Limits:' |
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check_limit_over /proc/sys/kernel/keys/root_maxkeys 10000 |
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} |
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echo |
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# --- |
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SUDO= |
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[ $(id -u) -ne 0 ] && SUDO=sudo |
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lsmod | grep -q configs || $SUDO modprobe configs || true |
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if [ -z "$CONFIG" ]; then |
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for tryConfig in ${possibleConfigs}; do |
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if [ -e "$tryConfig" ]; then |
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CONFIG="$tryConfig" |
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break |
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fi |
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done |
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fi |
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if [ ! -e "$CONFIG" ]; then |
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case "$CONFIG" in |
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-*) |
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warning "error: argument $CONFIG" |
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;; |
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*) |
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warning "error: cannot find kernel config $CONFIG" |
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;; |
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esac |
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warning " try running this script again, specifying the kernel config:" |
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warning " set CONFIG=/path/to/kernel/.config or add argument /path/to/kernel/.config" |
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exit 1 |
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fi |
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wrap_color "info: reading kernel config from $CONFIG ..." cyan |
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zcat $CONFIG >/dev/null 2>&1 || configFormat= |
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echo |
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echo 'Generally Necessary:' |
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echo -n '- ' |
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cgroupSubsystemDir="$(awk '/[, ](cpu|cpuacct|cpuset|devices|freezer|memory)[, ]/ && $3 == "cgroup" { print $2 }' /proc/mounts | head -n1)" |
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cgroupDir="$(dirname "$cgroupSubsystemDir")" |
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if [ -d "$cgroupDir/cpu" ] || [ -d "$cgroupDir/cpuacct" ] || [ -d "$cgroupDir/cpuset" ] || [ -d "$cgroupDir/devices" ] || [ -d "$cgroupDir/freezer" ] || [ -d "$cgroupDir/memory" ]; then |
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echo "$(wrap_good 'cgroup hierarchy' 'properly mounted') [$cgroupDir]" |
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else |
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if [ "$cgroupSubsystemDir" ]; then |
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echo "$(wrap_bad 'cgroup hierarchy' 'single mountpoint!') [$cgroupSubsystemDir]" |
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else |
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wrap_bad 'cgroup hierarchy' 'nonexistent??' |
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fi |
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EXITCODE=1 |
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echo " $(wrap_color '(see https://github.com/tianon/cgroupfs-mount)' yellow)" |
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fi |
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if [ "$(cat /sys/module/apparmor/parameters/enabled 2>/dev/null)" = 'Y' ]; then |
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echo -n '- ' |
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if command -v apparmor_parser &> /dev/null; then |
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wrap_good 'apparmor' 'enabled and tools installed' |
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else |
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wrap_bad 'apparmor' 'enabled, but apparmor_parser missing' |
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echo -n ' ' |
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if command -v apt-get &> /dev/null; then |
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wrap_color '(use "apt-get install apparmor" to fix this)' |
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elif command -v yum &> /dev/null; then |
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wrap_color '(your best bet is "yum install apparmor-parser")' |
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else |
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wrap_color '(look for an "apparmor" package for your distribution)' |
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fi |
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EXITCODE=1 |
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fi |
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fi |
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flags=" |
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NAMESPACES NET_NS PID_NS IPC_NS UTS_NS |
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CGROUPS CGROUP_CPUACCT CGROUP_DEVICE CGROUP_FREEZER CGROUP_SCHED CPUSETS MEMCG |
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KEYS |
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VETH BRIDGE BRIDGE_NETFILTER |
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NF_NAT_IPV4 IP_NF_FILTER IP_NF_TARGET_MASQUERADE |
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NETFILTER_XT_MATCH_ADDRTYPE NETFILTER_XT_MATCH_CONNTRACK NETFILTER_XT_MATCH_IPVS |
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IP_NF_NAT NF_NAT NF_NAT_NEEDED |
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POSIX_MQUEUE |
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" |
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IS_ERROR=1 check_flags $flags |
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if [ "$kernelMajor" -lt 4 ] || ( [ "$kernelMajor" -eq 4 ] && [ "$kernelMinor" -lt 8 ] ); then |
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check_flags DEVPTS_MULTIPLE_INSTANCES |
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fi |
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echo |
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echo 'Optional Features:' |
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{ |
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check_flags USER_NS |
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check_distro_userns |
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} |
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{ |
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check_flags SECCOMP |
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} |
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{ |
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check_flags CGROUP_PIDS |
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} |
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# { |
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# CODE=${EXITCODE} |
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# check_flags MEMCG_SWAP MEMCG_SWAP_ENABLED |
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# if [ -e /sys/fs/cgroup/memory/memory.memsw.limit_in_bytes ]; then |
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# echo " $(wrap_color '(cgroup swap accounting is currently enabled)' bold black)" |
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# EXITCODE=${CODE} |
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# elif is_set MEMCG_SWAP && ! is_set MEMCG_SWAP_ENABLED; then |
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# echo " $(wrap_color '(cgroup swap accounting is currently not enabled, you can enable it by setting boot option "swapaccount=1")' bold black)" |
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# fi |
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# } |
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# { |
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# if is_set LEGACY_VSYSCALL_NATIVE; then |
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# echo -n "- "; wrap_bad "CONFIG_LEGACY_VSYSCALL_NATIVE" 'enabled' |
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# echo " $(wrap_color '(dangerous, provides an ASLR-bypassing target with usable ROP gadgets.)' bold black)" |
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# elif is_set LEGACY_VSYSCALL_EMULATE; then |
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# echo -n "- "; wrap_good "CONFIG_LEGACY_VSYSCALL_EMULATE" 'enabled' |
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# elif is_set LEGACY_VSYSCALL_NONE; then |
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# echo -n "- "; wrap_bad "CONFIG_LEGACY_VSYSCALL_NONE" 'enabled' |
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# echo " $(wrap_color '(containers using eglibc <= 2.13 will not work. Switch to' bold black)" |
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# echo " $(wrap_color ' "CONFIG_VSYSCALL_[NATIVE|EMULATE]" or use "vsyscall=[native|emulate]"' bold black)" |
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# echo " $(wrap_color ' on kernel command line. Note that this will disable ASLR for the,' bold black)" |
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# echo " $(wrap_color ' VDSO which may assist in exploiting security vulnerabilities.)' bold black)" |
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# # else Older kernels (prior to 3dc33bd30f3e, released in v4.40-rc1) do |
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# # not have these LEGACY_VSYSCALL options and are effectively |
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# # LEGACY_VSYSCALL_EMULATE. Even older kernels are presumably |
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# # effectively LEGACY_VSYSCALL_NATIVE. |
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# fi |
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# } |
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|
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if [ "$kernelMajor" -lt 4 ] || ( [ "$kernelMajor" -eq 4 ] && [ "$kernelMinor" -le 5 ] ); then |
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check_flags MEMCG_KMEM |
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fi |
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|
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if [ "$kernelMajor" -lt 3 ] || ( [ "$kernelMajor" -eq 3 ] && [ "$kernelMinor" -le 18 ] ); then |
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check_flags RESOURCE_COUNTERS |
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fi |
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|
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if [ "$kernelMajor" -lt 3 ] || ( [ "$kernelMajor" -eq 3 ] && [ "$kernelMinor" -le 13 ] ); then |
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netprio=NETPRIO_CGROUP |
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else |
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netprio=CGROUP_NET_PRIO |
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fi |
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|
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# IOSCHED_CFQ CFQ_GROUP_IOSCHED |
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flags=" |
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BLK_CGROUP BLK_DEV_THROTTLING |
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CGROUP_PERF |
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CGROUP_HUGETLB |
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NET_CLS_CGROUP $netprio |
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CFS_BANDWIDTH FAIR_GROUP_SCHED RT_GROUP_SCHED |
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IP_NF_TARGET_REDIRECT |
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IP_VS |
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IP_VS_NFCT |
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IP_VS_PROTO_TCP |
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IP_VS_PROTO_UDP |
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IP_VS_RR |
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" |
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check_flags $flags |
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|
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# if ! is_set EXT4_USE_FOR_EXT2; then |
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# check_flags EXT3_FS EXT3_FS_XATTR EXT3_FS_POSIX_ACL EXT3_FS_SECURITY |
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# if ! is_set EXT3_FS || ! is_set EXT3_FS_XATTR || ! is_set EXT3_FS_POSIX_ACL || ! is_set EXT3_FS_SECURITY; then |
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# echo " $(wrap_color '(enable these ext3 configs if you are using ext3 as backing filesystem)' bold black)" |
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# fi |
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# fi |
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|
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check_flags EXT4_FS EXT4_FS_POSIX_ACL EXT4_FS_SECURITY |
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if ! is_set EXT4_FS || ! is_set EXT4_FS_POSIX_ACL || ! is_set EXT4_FS_SECURITY; then |
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if is_set EXT4_USE_FOR_EXT2; then |
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echo " $(wrap_color 'enable these ext4 configs if you are using ext3 or ext4 as backing filesystem' bold black)" |
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else |
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echo " $(wrap_color 'enable these ext4 configs if you are using ext4 as backing filesystem' bold black)" |
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fi |
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fi |
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|
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echo '- Network Drivers:' |
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echo " - \"$(wrap_color 'overlay' blue)\":" |
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check_flags VXLAN | sed 's/^/ /' # BRIDGE_VLAN_FILTERING |
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echo ' Optional (for encrypted networks):' |
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check_flags CRYPTO CRYPTO_AEAD CRYPTO_GCM CRYPTO_SEQIV CRYPTO_GHASH \ |
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XFRM XFRM_USER XFRM_ALGO INET_ESP INET_XFRM_MODE_TRANSPORT | sed 's/^/ /' |
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# echo " - \"$(wrap_color 'ipvlan' blue)\":" |
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# check_flags IPVLAN | sed 's/^/ /' |
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# echo " - \"$(wrap_color 'macvlan' blue)\":" |
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# check_flags MACVLAN DUMMY | sed 's/^/ /' |
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# echo " - \"$(wrap_color 'ftp,tftp client in container' blue)\":" |
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# check_flags NF_NAT_FTP NF_CONNTRACK_FTP NF_NAT_TFTP NF_CONNTRACK_TFTP | sed 's/^/ /' |
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|
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# only fail if no storage drivers available |
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CODE=${EXITCODE} |
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EXITCODE=0 |
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STORAGE=1 |
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|
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echo '- Storage Drivers:' |
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# echo " - \"$(wrap_color 'aufs' blue)\":" |
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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 " $(wrap_color '(note that some kernels include AUFS patches but not the AUFS_FS flag)' bold black)" |
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# fi |
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# [ "$EXITCODE" = 0 ] && STORAGE=0 |
||||
# EXITCODE=0 |
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|
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# echo " - \"$(wrap_color 'btrfs' blue)\":" |
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# check_flags BTRFS_FS | sed 's/^/ /' |
||||
# check_flags BTRFS_FS_POSIX_ACL | sed 's/^/ /' |
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# [ "$EXITCODE" = 0 ] && STORAGE=0 |
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# EXITCODE=0 |
||||
|
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# echo " - \"$(wrap_color 'devicemapper' blue)\":" |
||||
# check_flags BLK_DEV_DM DM_THIN_PROVISIONING | sed 's/^/ /' |
||||
# [ "$EXITCODE" = 0 ] && STORAGE=0 |
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# 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 |
||||
if [ $EXITCODE -eq 0 ]; then |
||||
wrap_good 'STATUS' 'pass' |
||||
else |
||||
wrap_bad 'STATUS' 'fail' |
||||
fi |
||||
|
||||
exit $EXITCODE |
||||
@ -0,0 +1,15 @@
|
||||
package cmds |
||||
|
||||
import ( |
||||
"github.com/urfave/cli" |
||||
) |
||||
|
||||
func NewCheckConfigCommand(action func(*cli.Context) error) cli.Command { |
||||
return cli.Command{ |
||||
Name: "check-config", |
||||
Usage: "Run config check", |
||||
SkipFlagParsing: true, |
||||
SkipArgReorder: true, |
||||
Action: action, |
||||
} |
||||
} |
||||
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