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# All the command used here : http://blog.madrzejewski.com/faire-fonctionner-curl-en-https-dans-un-environnement-php-fpm-chroote
# Centos 7.1, the libs named may changed in the future, so don't just copy/paste and check on your system first
# First example, chroot bash
mkdir chroot_bash
mkdir -p chroot_bash/usr/bin
cp /usr/bin/bash chroot_bash/usr/bin
chroot chroot_bash/ bash
chroot: failed to run command ‘bash’: No such file or directory
ldd /usr/bin/bash
linux-vdso.so.1 => (0x00007fff22d80000)
libtinfo.so.5 => /lib64/libtinfo.so.5 (0x00007f15009d9000)
libdl.so.2 => /lib64/libdl.so.2 (0x00007f15007d5000)
libc.so.6 => /lib64/libc.so.6 (0x00007f1500413000)
/lib64/ld-linux-x86-64.so.2 (0x00007f1500c0d000)
mkdir chroot_bash/lib64
cp /lib64/libtinfo.so.5 /lib64/libdl.so.2 /lib64/libc.so.6 /lib64/ld-linux-x86-64.so.2 chroot_bash/lib64/
chroot chroot_bash/ bash
bash-4.2# pwd
/
bash-4.2# ls
bash: ls: command not found
# Chroot php-fpm
useradd -md /home/tuto tuto
mkdir /home/tuto/www
wget http://fr.wordpress.org/latest-fr_FR.zip
unzip latest-fr_FR.zip && mv wordpress/* /home/tuto/www
rm -rf wordpress/ latest-fr_FR.zip
chwon -R tuto: ~tuto
mkdir -p /home/tuto/{etc,usr/share,var/lib/php/session,var/log/php-fpm,tmp,lib64,lib,bin,dev}
cp -r /usr/share/zoneinfo /home/tuto/usr/share/
cp -r /etc/ld.so.cache /etc/resolv.conf /etc/ld.so.conf /etc/nsswitch.conf /etc/hosts /etc/localtime /home/tuto/etc/
mkdir -p /home/tuto/var/lib/mysql && touch /home/tuto/var/lib/mysql/mysql.sock
chown -R tuto: ~tuto
mount --bind /var/lib/mysql/mysql.sock /home/tuto/var/lib/mysql/mysql.sock
mknod /home/tuto/dev/null c 1 3 -m 666
# Problems with SSL and the DNS resolution
cp -vaR /lib64/libdns-export.so.100.1.1 /lib64/libdns.so.100.1.1 /lib64/libnss_dns-2.17.so .
cd /home/tuto/lib64
ln -s libdns-export.so.100.1.1 libdns-export.so.100
ln -s libdns.so.100.1.1 libdns.so.100
ln -s libnss_dns.so libnss_dns.so.2
ln -s libnss_dns-2.17.so libnss_dns.so
# An quick example on how to use strace
ps -ef |grep php-fpm
strace -p PID_PROCESSUS 2> logs_
# Let's continue with the dns problem
cp -vaR /etc/pki /home/tuto/etc/
cp -vaR /lib64/nss /home/tuto/lib64
# Another strace example to show the ssl problem
strace chroot /home/tuto /bin/curl -v https://google.com 2> logs_3
# SSL solution
cp /lib64/libsoftokn3.so /lib64/libnss3.so /etc/alternatives/libnssckbi.so.x86_64 /lib64/libnss_compat-2.17.so /lib64/libnss_compat.so.2 /lib64/libnss_db-2.17.so /lib64/libnss_db.so.2 libnss_db-2.17.so /lib64/libfreeblpriv3.so /lib64/libnss_dns-2.17.so /lib64/libnss_files-2.17.so /lib64/libnss_hesiod-2.17.so /lib64/libnss_myhostname.so.2 /lib64/libnss_nis-2.17.so /lib64/libnss_nisplus-2.17.so /lib64/libnsspem.so /lib64/libnss_sss.so.2 /lib64/libnsssysinit.so /lib64/libnssutil3.so /home/tuto/lib64
cp /lib64/libsqlite3.so.0 /lib64/libsqlite3.so.0.8.6 tuto/lib64/
#!/bin/bash
# Be careful, do not use in production
# Just a quick script for messing around with chroot and ldd
usage(){
echo "Usage : $0 cmd_name homedir"
echo "Example : $0 cp /home/alex"
exit 1
}
error(){
test "$1" == "" && (echo "An unknow error occurded" ; exit 1)
echo "$1" ; exit 1
}
# $1 : cmd
findCmdPath(){
oldIFS=$IFS
IFS=$':'
for dir in $PATH ; do
fullPath=$(find $dir -name $1 2> /dev/null)
test "$fullPath" != "" && (echo $fullPath ; return)
done
}
# $1 : fullPath of cmd
# I tried others commands to find the full/real path for a symlink
# for example "readlink" but it was not working properly for my usage
# I just wanted the "first degree" of symlink so ls -l worked fine for this
findLibs(){
ldd $1 |tr -d '\t'| tr -d ' ' |cut -d '>' -f 2|cut -d '(' -f 1|grep -E '^/' 2> /dev/null || error "LDD error"
}
# $1 : lib path (or symlink)
# $2 : homedir without the trailing /
copyLib(){
if test -L $1 ; then
# symlink
currentPath=$(dirname $1)
# copy the symlink
mkdir -p $2$currentPath 2> /dev/null
cp -va $1 $2$currentPath
# find the real file
realFile=$(ls -lh $1 | tr -d ' ' | cut -d '>' -f 2)
realFile=$currentPath'/'$realFile
mkdir -p $2$currentPath 2> /dev/null
cp -va $realFile $2$currentPath
else
# file
currentPath=$(dirname $1)
mkdir -p $2$currentPath 2> /dev/null
cp -va $1 $2$currentPath
fi
}
# Tests
test "$#" != 2 && usage
cmdPath=$(findCmdPath $1)
test "$cmdPath" == "" && error "$1 was not found in the PATH"
homeDir=$(echo $2 | sed 's:/*$::') # remove the trailing /
test ! -d "$homeDir" && error "$homeDir is not a directory"
# main
for lib in $(findLibs $cmdPath) ; do
copyLib $lib $homeDir
done
[tuto]
listen = /var/run/tuto.sock
listen.allowed_clients = 127.0.0.1
listen.owner = nginx
listen.group = nginx
user = tuto
group = tuto
pm = dynamic
pm.max_children = 50
pm.start_servers = 5
pm.min_spare_servers = 5
pm.max_spare_servers = 20
pm.max_requests = 500
slowlog = /var/log/php-fpm/tuto-slow.log
chroot = /home/tuto
chdir = /www
env[HOSTNAME] = $HOSTNAME
env[TMP] = /tmp
env[TMPDIR] = /tmp
env[TEMP] = /tmp
php_flag[display_errors] = on
php_admin_value[error_log] = /var/log/php-fpm/www-error.log
php_admin_flag[log_errors] = on
php_value[session.save_handler] = files
php_value[session.save_path] = /var/lib/php/session
server {
listen 80;
server_name tuto.madrzejewski.com;
root /home/tuto/www;
access_log /var/log/nginx/tuto.madrzejewski.com-access.log;
error_log /var/log/nginx/tuto.madrzejewski.com-error.log;
location = /favicon.ico {
log_not_found off;
access_log off;
}
location = /robots.txt {
allow all;
log_not_found off;
access_log off;
}
# auth for admin directory
location /wp-admin/ {
auth_basic "Access restreint";
auth_basic_user_file /etc/nginx/htpasswd/passwd;
}
# no PHP in upload directory
location ~* /(?:uploads|files)/.*\.php$ {
deny all;
}
# hide sensitive files
#location ~* \.(engine|inc|info|install|make|module|profile|test|po|sh|.*sql|theme|tpl(\.php)?|xtmpl)$|^(\..*|Entries.*|Repository|Root|Tag|Template)$|\.php_
#{
# return 444;
#}
# no cgi
location ~* \.(pl|cgi|py|sh|lua)\$ {
return 444;
}
# no access to specific files
location ~ /(\.|wp-config.php|readme.html|license.txt) {
deny all;
}
location / {
# This is cool because no php is touched for static content.
# include the "?$args" part so non-default permalinks doesn't break when using query string
try_files $uri $uri/ /index.php?$args;
}
# no weird request
if ($request_method !~ ^(GET|HEAD|POST)$ )
{
return 444;
}
location ~ [^/]\.php(/|$) {
include /etc/nginx/fastcgi.conf;
fastcgi_split_path_info ^(.+?\.php)(/.*)$;
if (!-f $document_root$fastcgi_script_name) {
return 404;
}
#fastcgi_pass 127.0.0.1:9000;
# debug test chroot phpfpm
fastcgi_param SCRIPT_FILENAME /www/$fastcgi_script_name;
fastcgi_pass unix:/var/run/tuto.sock;
fastcgi_index index.php;
}
location ~* \.(js|css|png|jpg|jpeg|gif|ico)$ {
expires max;
log_not_found off;
}
}
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