{"id":2989,"date":"2010-05-05T03:57:34","date_gmt":"2010-05-05T07:57:34","guid":{"rendered":"http:\/\/g33kinfo.com\/info\/?p=2989"},"modified":"2010-05-05T03:57:34","modified_gmt":"2010-05-05T07:57:34","slug":"how-to-create-a-centos-5-4-amazon-ami-with-java-and-tomcat","status":"publish","type":"post","link":"https:\/\/g33kinfo.com\/info\/how-to-create-a-centos-5-4-amazon-ami-with-java-and-tomcat\/","title":{"rendered":"How to create a CentOS 5.4 Amazon AMI with java and tomcat"},"content":{"rendered":"

From kampx.com<\/a>
\nAfter some experimenting with Google App Engine, there is one thing that bothers me the most; I cannot run any background programs. <\/p>\n

So, I thought it was time to check out the competition at Amazon ec2. I like centos and I wanted to create an Amazon Machine Image (AMI) which runs on 5.4, contains a servlet engine (Apache Tomcat) and is able to receive http requests on port 80. There are a lot of resources available (here, here, here, here, here, here,here and here) but none of them did exactly what I want.<\/p>\n

The script I wrote (below) does the following things:
\n<\/p>\n

Uses the 32 bit version of CentOS 5.4 (only for Small or High-CPU Medium instances)
\na 5GB file system
\nreroute traffic from port 8080 to 80 (using iptables)
\nInstall a xen compatible kernel
\nPrevent the re spawning of tty2 to 6
\nInstall java
\nInstall tomcat & auto start
\nIf you have any remarks\/comments, please let me know, than I can improve this script.<\/p>\n

First I installed centos 5.4 in a VMware environment and from there I created the Amazon AMI.<\/p>\n


\n#create a 5GB image:
\ndd if=\/dev\/zero of=centos54ami.sf bs=1M count=5120
\n#create a filesystem:
\n\/sbin\/mke2fs -F -j centos54ami.sf
\n#create mountpoint:
\nmkdir \/mnt\/ec2-fs
\n#mount on loopback:
\nmount -o loop centos54ami.sf \/mnt\/ec2-fs
\n#create devices:
\nmkdir \/mnt\/ec2-fs\/dev
\n\/sbin\/MAKEDEV -d \/mnt\/ec2-fs\/dev\/ -x console
\n\/sbin\/MAKEDEV -d \/mnt\/ec2-fs\/dev\/ -x null
\n\/sbin\/MAKEDEV -d \/mnt\/ec2-fs\/dev\/ -x zero
\n#create etc:
\nmkdir \/mnt\/ec2-fs\/etc
\n#Create a proc point for the image and mount it:
\nmkdir \/mnt\/ec2-fs\/proc
\nmount -t proc none \/mnt\/ec2-fs\/proc
\n#vi yum-xen.conf file (on the local filesystem\/not on the mount)
\nvi yum-xen.conf<\/p>\n

[main]
\ncachedir=\/var\/cache\/yum
\ndebuglevel=2
\nlogfile=\/var\/log\/yum.log
\nexclude=*-debuginfo
\ngpgcheck=0
\nobsoletes=1
\npkgpolicy=newest
\ndistroverpkg=redhat-release
\ntolerant=1
\nexactarch=1
\nreposdir=\/dev\/null
\nmetadata_expire=1800
\n[base]
\nname=CentOS-5.4 \u2013 Base
\nbaseurl=http:\/\/mirror.centos.org\/centos\/5.4\/os\/i386\/
\ngpgcheck=1
\ngpgkey=http:\/\/mirror.centos.org\/centos\/RPM-GPG-KEY-CentOS-5
\npriority=1
\nprotect=1
\n#released updates
\n[update]
\nname=CentOS-5.4 \u2013 Updates
\nbaseurl=http:\/\/mirror.centos.org\/centos\/5.4\/updates\/i386\/
\ngpgcheck=1
\ngpgkey=http:\/\/mirror.centos.org\/centos\/RPM-GPG-KEY-CentOS-5
\npriority=1
\nprotect=1
\n#packages used\/produced in the build but not released
\n[addons]
\nname=CentOS-5.4 \u2013 Addons
\nbaseurl=http:\/\/mirror.centos.org\/centos\/5.4\/addons\/i386\/
\ngpgcheck=1
\ngpgkey=http:\/\/mirror.centos.org\/centos\/RPM-GPG-KEY-CentOS-5
\npriority=1
\n[extras]
\nname=CentOS 5.4 Extras $releasever \u2013 $basearch
\nbaseurl=http:\/\/mirror.centos.org\/centos\/5.4\/extras\/i386\/
\nenabled=1
\n#Run the yum installer and install the Core group:
\nyum -c yum-xen.conf \u2013installroot=\/mnt\/ec2-fs -y groupinstall Core
\n#setup network settings:
\nvi \/mnt\/ec2-fs\/etc\/sysconfig\/network-scripts\/ifcfg-eth0<\/p>\n

DEVICE=eth0
\nBOOTPROTO=dhcp
\nONBOOT=yes
\nTYPE=Ethernet
\nUSERCTL=yes
\nPEERDNS=yes
\nIPV6INIT=no<\/p>\n

#Turn on networking:
\nvi \/mnt\/ec2-fs\/etc\/sysconfig\/network<\/p>\n

NETWORKING=yes
\n#create resolv.conf:
\nvi \/mnt\/ec2-fs\/etc\/resolv.conf
\nsearch z-2.compute-1.internal?nameserver 172.16.0.23<\/p>\n

#Set up the hard drives:
\nvi \/mnt\/ec2-fs\/etc\/fstab<\/p>\n

\/dev\/sda1 \/ ext3 defaults 1 1
\nnone \/dev\/pts devpts gid=5,mode=620 0 0
\nnone \/dev\/shm tmpfs defaults 0 0
\nnone \/proc proc defaults 0 0
\nnone \/sys sysfs defaults 0 0
\n\/dev\/sda2 \/mnt ext3 defaults 0 0
\n\/dev\/sda3 swap swap defaults 0 0<\/p>\n

#Install wget, curl and iptables
\nyum -c yum-xen.conf \u2013installroot=\/mnt\/ec2-fs -y install wget
\nyum -c yum-xen.conf \u2013installroot=\/mnt\/ec2-fs -y install curl
\nyum -c yum-xen.conf \u2013installroot=\/mnt\/ec2-fs -y install iptables<\/p>\n

#disable selinux
\nvi \/mnt\/ec2-fs\/etc\/selinux\/config<\/p>\n

SELINUX=disabled<\/p>\n

#comment out the respawning of tty2 to 6<\/p>\n

vi \/mnt\/ec2-fs\/etc\/inittab<\/p>\n

comment out mingetty tty2 to 6<\/p>\n

#create script to retrieve the public key
\nvi \/mnt\/ec2-fs\/usr\/local\/sbin\/get-credentials.sh<\/p>\n

#!\/bin\/sh
\nif [ ! -d \/root\/.ssh ] ;
\nthen mkdir -p \/root\/.ssh
\nchmod 700 \/root\/.ssh
\nfi<\/p>\n

# Fetch public key using HTTP<\/p>\n

curl -f http:\/\/169.254.169.254\/latest\/meta-data\/public-keys\/0\/openssh-key > \/tmp\/my-key
\nif [ $? -eq 0 ] ;
\nthen
\ncat \/tmp\/my-key >> \/root\/.ssh\/authorized_keys
\nchmod 600 \/root\/.ssh\/authorized_keys
\nrm -f \/tmp\/my-key
\nfi<\/p>\n

#add execute rights
\nchmod +x \/mnt\/ec2-fs\/usr\/local\/sbin\/get-credentials.sh<\/p>\n

#add line to rc.local:
\nvi \/mnt\/ec2-fs\/etc\/rc.local<\/p>\n

\/usr\/local\/sbin\/get-credentials.sh<\/p>\n

#download & install java
\nwget http:\/\/javadl.sun.com\/webapps\/download\/AutoDL?BundleId=37391
\nmv jre-6u18-linux-i586.bin
\nchmod +x jre-6u18-linux-i586.bin
\n.\/jre-6u18-linux-i586.bin
\nmv jre1.6.0_18 \/mnt\/ec2-fs\/usr\/lib\/<\/p>\n

#download & install tomcat
\nwget http:\/\/archive.apache.org\/dist\/tomcat\/tomcat-5\/v5.5.28\/bin\/apache-tomcat-5.5.28.tar.gz
\ntar -xzf apache-tomcat-5.5.28.tar.gz
\nmv apache-tomcat-5.5.28 \/mnt\/ec2-fs\/opt\/tomcat
\necho \u201cexport CATALINA_HOME=\/opt\/tomcat\u201d >> \/mnt\/ec2-fs\/root\/.bashrc
\necho \u201cCATALINA_BASE=\/opt\/tomcat\u201d >> \/mnt\/ec2-fs\/root\/.bashrc<\/p>\n

#autostartup tomcat
\nvi \/mnt\/ec2-fs\/etc\/init.d\/tomcat<\/p>\n

#!\/bin\/bash
\n#
\n# tomcat
\n#
\n# chkconfig: 2345 80 30
\n# description: Start up the Tomcat servlet engine.<\/p>\n

# Source function library.
\n. \/etc\/init.d\/functions<\/p>\n

RETVAL=$?
\nCATALINA_HOME=\u201d\/opt\/tomcat\u201d
\nexport JAVA_HOME=\u201d\/usr\/lib\/jre\u201d
\ncase \u201c$1? in
\nstart)
\nif [ -f $CATALINA_HOME\/bin\/startup.sh ];
\nthen
\necho $\u201dStarting Tomcat\u201d
\n\/bin\/su tomcat $CATALINA_HOME\/bin\/startup.sh
\nfi
\n;;
\nstop)
\nif [ -f $CATALINA_HOME\/bin\/shutdown.sh ];
\nthen
\necho $\u201dStopping Tomcat\u201d
\n\/bin\/su tomcat $CATALINA_HOME\/bin\/shutdown.sh
\nfi
\n;;
\n*)
\necho $\u201dUsage: $0 {start|stop}\u201d
\nexit 1
\n;;
\nesac<\/p>\n

exit $RETVAL
\nthen<\/p>\n

chmod +x \/mnt\/ec2-fs\/etc\/init.d\/tomcat
\ncd \/mnt\/ec2-fs\/etc\/rc5.d
\nln -s \/mnt\/ec2-fs\/etc\/init.d\/tomcat \/mnt\/ec2-fs\/etc\/rc5.d\/S71tomcat<\/p>\n

#Chroot and auto start the services sshd and tomcat:<\/p>\n

\/usr\/sbin\/chroot \/mnt\/ec2-fs \/bin\/sh
\n\/sbin\/chkconfig \u2013level 345 sshd on
\n\/sbin\/chkconfig tomcat on<\/p>\n

#create link for java lib<\/p>\n

cd \/usr\/lib
\nln -s jre1.6.0_18 jre<\/p>\n

#set the correct java path<\/p>\n

echo \u201cexport JAVA_HOME=\/usr\/lib\/jre\u201d >> \/root\/.bashrc
\necho \u201cexport PATH=\/usr\/lib\/jre\/bin:$PATH\u201d >> \/root\/.bashrc
\n\/usr\/sbin\/useradd -d \/opt\/tomcat tomcat
\nchown -R tomcat:tomcat \/opt\/tomcat<\/p>\n

#remove default installed applications<\/p>\n

cd \/opt\/tomcat\/webapps
\nrm -r balancer\/
\nrm -r webdav\/
\nrm -r tomcat-docs\/
\nrm -r servlets-examples\/
\nrm -r jsp-examples\/<\/p>\n

#install custom kernel<\/p>\n

cd\/
\nwget http:\/\/s3.amazonaws.com\/ec2-downloads\/modules-2.6.16-ec2.tgz
\ngunzip modules-2.6.16-ec2.tgz
\ntar -xvf modules-2.6.16-ec2.tar
\n\/sbin\/depmod -ae 2.6.16-xenU<\/p>\n

#fix some Xen guest kernels things<\/p>\n

vi \/etc\/ld.so.conf.d\/libc6-xen.conf<\/p>\n

# This directive teaches ldconfig to search in nosegneg subdirectories
\n# and cache the DSOs there with extra bit 0 set in their hwcap match
\n# fields. In Xen guest kernels, the vDSO tells the dynamic linker to
\n# search in nosegneg subdirectories and to match this extra hwcap bit
\n# in the ld.so.cache file.
\nhwcap 0 nosegneg<\/p>\n

#create the necessary links and cache<\/p>\n

\/sbin\/ldconfig<\/p>\n

#redirect port 80 to 8080<\/p>\n

\/sbin\/iptables \u2013flush
\n\/sbin\/iptables \u2013table nat \u2013flush
\n\/sbin\/iptables -t nat -A PREROUTING -j REDIRECT -p tcp \u2013destination-port 80:80 \u2013to-ports 8080
\n\/sbin\/iptables-save<\/p>\n

#Exit out of your chroot:<\/p>\n

exit<\/p>\n

#cleanup<\/p>\n

yum -c yum-xen.conf \u2013installroot=\/mnt\/ec2-fs clean all<\/p>\n

#Unmount the image<\/p>\n

umount \/mnt\/ec2-fs\/proc
\numount -d \/mnt\/ec2-fs<\/p>\n

#install ruby<\/p>\n

yum install ruby<\/p>\n

#Download the EC2 AMI Tools:
\nwget http:\/\/s3.amazonaws.com\/ec2-downloads\/ec2-ami-tools.noarch.rpm<\/p>\n

#Install the EC2 AMI Tools<\/p>\n

rpm -Uvh ec2-ami-tools.noarch.rpm<\/p>\n

#bundle the your image<\/p>\n

\/usr\/local\/bin\/ec2-bundle-image -i centos54ami.sf -c -k -u <\/p>\n

#upload to s3<\/p>\n

\/usr\/local\/bin\/ec2-upload-bundle -b -m \/tmp\/centos54ami.sf.manifest.xml -a -s <\/p>\n

With the AWS console, you can now register and startup the AMI<\/p>\n

#log on to the newly created instance<\/p>\n

ssh -i<\/code><\/p>\n

From kampx.com<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"

From kampx.com After some experimenting with Google App Engine, there is one thing that bothers me the most; I cannot run any background programs. So, I thought it was time to check out the competition at Amazon ec2. I like centos and I wanted to create an Amazon Machine Image (AMI) which runs on 5.4,… <\/p>\n

Read More<\/i><\/a><\/div>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[9],"tags":[],"class_list":["post-2989","post","type-post","status-publish","format-standard","hentry","category-info"],"yoast_head":"\nHow to create a CentOS 5.4 Amazon AMI with java and tomcat - Linux Shtuff<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/g33kinfo.com\/info\/how-to-create-a-centos-5-4-amazon-ami-with-java-and-tomcat\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"How to create a CentOS 5.4 Amazon AMI with java and tomcat - Linux Shtuff\" \/>\n<meta property=\"og:description\" content=\"From kampx.com After some experimenting with Google App Engine, there is one thing that bothers me the most; I cannot run any background programs. 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