Month: January 2010

Since Puppet is written in Ruby, some of its syntax are Ruby-specific (I would not know for sure since I have not learned about Ruby yet). I’ll try to update this post so beginners to Puppet and strangers to Ruby can get pass the unwanted headache. Case-sensitivity Case-changing is one of the source of confusions.…

If you need to determine the return code for shell scripting, you can use “$?” # ifconfig | grep eth0 >/dev/null 2>&1 # echo $? 0 => good/found # ifconfig | grep eth1111 >/dev/null 2>&1 # echo $? 1 => bad/not found

This quick reference to install haproxy, stunnel to support SSL forwarding (with IP forwarding patch) wget http://haproxy.1wt.eu/download/1.3/src/haproxy-1.3.22.tar.gz tar -zxf haproxy-1.3.22.tar.gz cd haproxy-1.3.22 make TARGET=linux26 cp haproxy /usr/sbin/haproxy vi /etc/haproxy.cfg … vi /etc/init.d/haproxy … chmod +x /etc/init.d/haproxy useradd haproxy mkdir -p /var/chroot/haproxy chown haproxy:haproxy /var/chroot/haproxy chmod 700 /var/chroot/haproxy service haproxy start chkconfig –add haproxy vi /etc/sysconfig/syslog…

If you try to install APC via scripting, you might experience the interactive prompt asking about “apxs”. How to by pass that? Use expect (“yum install expect”). This script will solve your problem: #!/usr/bin/expect spawn pecl install apc expect “Use apxs to set compile flag” send “yes\r” expect “install ok” expect eof