Skip to content

Instantly share code, notes, and snippets.

@tomisaacson

tomisaacson/instance_checker.sh

Created October 19, 2018 01:23
Show Gist options
  • Save tomisaacson/4d5c037ec9bbb6ad1349d11db809c4e9 to your computer and use it in GitHub Desktop.
Save tomisaacson/4d5c037ec9bbb6ad1349d11db809c4e9 to your computer and use it in GitHub Desktop.
Download ZIP
File I got from AWS to help check the Linux VM I was trying to import to EC2 was supported
Raw
instance_checker.sh
#!/bin/bash
##########################################################################################
# AWS VM Import Instance Checker 1.2 #
# #
# The script has been implemented to simplify the VM Import process of the virtual #
# environment in AWS. #
# #
# The script checks that the requirements to import a VM in AWS are verified. #
# Please make a backup of the VM before to proceed. #
# #
# This software is provided "as is" without warranty of any kind. #
# #
# Please be aware that AWS does not accept any responsibility or liability #
# for the accuracy, content, completeness, or reliability of the script. #
# #
# CHANGELOG: #
# 1.1 #
# Added check for SLES wickedd dhcp. #
# Added check on the user running the script. #
# Added Centos 7.2 to Supported OS. #
# 1.2 #
# Fixed check on root filesystem using pivot_root # df -k / | grep '/$' #
# 1.3 #
# Added check for block device for currently booted kernel root device #
# Check for last fsck on root device if ext #
# 1.4 #
# Added Centos 6.7, 6.8, 6.9 and 7.3 #
# Added RHEL 6.7, 6.8, 6.9, 7.2, and 7.3 #
# Added Ubuntu 16.04 and 16.10 #
# Added sanity check for available filesystem space #
# 1.5 #
# Added fstab check for secondary volumes #
# 1.6 #
# Improved ethernet identification #
# Move advice to function #
##########################################################################################
set_defaults() {
day=`date +%d`
month=`date +%m`
year=`date +%Y`
hour=`date +%H`
minute=`date +%M`
OS_RELEASE=`cat /etc/*release|grep PRETTY|awk -F '"' '{ print $2 }'|awk '{ print $1 }'`
if [ $TRACE -eq 0 ]; then
LOGFILE="/dev/null"
else
LOGFILE="vm-check-script-$day-$month-$year.$hour.$minute.trace.log"
fi
}
splash_screen() {
clear
echo " ___ ______ __ ____ __ ___ _ "
echo " / \ \ / / ___| \ \ / / \/ | |_ _|_ __ ___ _ __ ___ _ __| |_ "
echo " / _ \ \ /\ / /\___ \ \ \ / /| |\/| | | || _ _ \| _ \ / _ \| '__| __|"
echo " / ___ \ V V / ___) | \ V / | | | | | || | | | | | |_) | (_) | | | |_ "
echo "/_/ \_\_/\_/ |____/ \_/ |_| |_| |___|_| |_| |_| __/ \___/|_| \__|"
echo " |_| "
echo " ___ _ _ _ "
echo "|_ _|_ __ ___| |_ __ _ _ __ ___ ___ ___| |__ ___ ___| | _____ _ __ "
echo " | || '_ \/ __| __/ _ | _ \ / __/ _ \ / __| _ \ / _ \/ __| |/ / _ \ __|"
echo " | || | | \__ \ || (_| | | | | (_| __/ | (__| | | | __/ (__| < __/ | "
echo "|___|_| |_|___/\__\__,_|_| |_|\___\___| \___|_| |_|\___|\___|_|\_\___|_| "
echo " "
echo " "
}
check_running_user() {
USER_RUNNING=`whoami`
if [[ $USER_RUNNING != "root" ]] ; then
echo -e "[\033[31mKO\e[0m] Please run the script as root user or using sudo!"
exit 1
fi
}
check_os() {
ORACLE_OS_RELEASE=/etc/oracle-release
SUSE_OS_RELEASE=/etc/SuSE-release
UBUNTU_OS_RELEASE=/etc/lsb-release
grep "Ubuntu" /etc/lsb-release >> /dev/null 2>&1
IS_UBUNTU=$?
DEBIAN_OS_RELEASE=/etc/debian_version
CENTOS_OS_RELEASE=/etc/centos-release
FEDORA_OS_RELEASE=/etc/fedora-release
REDHAT_OS_RELEASE=/etc/redhat-release
grep "Red Hat" /etc/redhat-release >> /dev/null 2>&1
IS_REDHAT=$?
if [[ -f $ORACLE_OS_RELEASE ]] ; then
ORACLE_REL=`cat /etc/oracle-release|awk '{ print $5 }'`
if [[ $ORACLE_REL == 6.1 ]] || [[ $ORACLE_REL == 6.2 ]] || [[ $ORACLE_REL == 6.3 ]] || [[ $ORACLE_REL == 6.4 ]] || [[ $ORACLE_REL == 6.5 ]] || [[ $ORACLE_REL == 6.6 ]] || [[ $ORACLE_REL == 7.0 ]] || [[ $ORACLE_REL == 7.1 ]] ; then
echo -e "[\033[32mOK\e[0m] The operating system is Oracle Enterprise Linux release $ORACLE_REL..."
else echo -e "[\033[31mKO\e[0m] The operating system is not supported!!!"
fi
elif [[ -f $SUSE_OS_RELEASE ]] ; then
SUSE_VERSION=`cat /etc/SuSE-release |grep VERSION|awk '{ print $3 }'`
SUSE_PATCH=`cat /etc/SuSE-release |grep PATCH|awk '{ print $3 }'`
SUSE_REL=$SUSE_VERSION"."$SUSE_PATCH
if [[ $SUSE_VERSION == 11 ]] || [[ $SUSE_VERSION == 12 ]] ; then
echo -e "[\033[32mOK\e[0m] The operating system is SUSE Linux Enterprise Server $SUSE_REL..."
else echo -e "[\033[31mKO\e[0m] The operating system is not supported!!!"
fi
elif [[ -f $UBUNTU_OS_RELEASE ]] && [[ $IS_UBUNTU -eq 0 ]] ; then
UBUNTU_REL=`cat /etc/lsb-release |grep DISTRIB_RELEASE|awk -F "=" '{ print $2 }'`
if [[ $UBUNTU_REL == 12.04 ]] || [[ $UBUNTU_REL == 12.10 ]] || [[ $UBUNTU_REL == 13.04 ]] || [[ $UBUNTU_REL == 13.10 ]] || [[ $UBUNTU_REL == 14.04 ]] || [[ $UBUNTU_REL == 14.10 ]] || [[ $UBUNTU_REL == 15.04 ]] || [[ $UBUNTU_REL == 16.04 ]] || [[ $UBUNTU_REL == 16.10 ]]; then
echo -e "[\033[32mOK\e[0m] The operating system is Ubuntu $UBUNTU_REL..."
else echo -e "[\033[31mKO\e[0m] The operating system is not supported!!!"
fi
elif [[ -f $DEBIAN_OS_RELEASE ]] ; then
DEBIAN_REL=`cat /etc/debian_version`
if [[ $DEBIAN_REL == 6.0.0 ]] || [[ $DEBIAN_REL == 6.0.1 ]] || [[ $DEBIAN_REL == 6.0.2 ]] || [[ $DEBIAN_REL == 6.0.3 ]] || [[ $DEBIAN_REL == 6.0.4 ]] || [[ $DEBIAN_REL == 6.0.5 ]] || [[ $DEBIAN_REL == 6.0.6 ]] || [[ $DEBIAN_REL == 6.0.7 ]] || [[ $DEBIAN_REL == 6.0.8 ]] || [[ $DEBIAN_REL == 7.0 ]] || [[ $DEBIAN_REL == 7.1 ]] || [[ $DEBIAN_REL == 7.2 ]] || [[ $DEBIAN_REL == 7.3 ]] || [[ $DEBIAN_REL == 7.4 ]] || [[ $DEBIAN_REL == 7.5 ]] || [[ $DEBIAN_REL == 7.6 ]] || [[ $DEBIAN_REL == 7.7 ]] || [[ $DEBIAN_REL == 7.8 ]] || [[ $DEBIAN_REL == 8.0 ]] ; then
echo -e "[\033[32mOK\e[0m] The operating system is Debian $DEBIAN_REL..."
else echo -e "[\033[31mKO\e[0m] The operating system is not supported!!!"
fi
elif [[ -f $CENTOS_OS_RELEASE ]] ; then
CENTOS_REL=`cat /etc/centos-release|grep CentOS|sed 's/[^0-9.]//g'|awk -F "." '{ print $1"."$2 }'`
if [[ $CENTOS_REL == 5.1 ]] || [[ $CENTOS_REL == 5.2 ]] || [[ $CENTOS_REL == 5.3 ]] || [[ $CENTOS_REL == 5.4 ]] || [[ $CENTOS_REL == 5.5 ]] || [[ $CENTOS_REL == 5.6 ]] || [[ $CENTOS_REL == 5.7 ]] || [[ $CENTOS_REL == 5.8 ]] || [[ $CENTOS_REL == 5.9 ]] || [[ $CENTOS_REL == 5.10 ]] || [[ $CENTOS_REL == 5.11 ]] || [[ $CENTOS_REL == 6.1 ]] || [[ $CENTOS_REL == 6.2 ]] || [[ $CENTOS_REL == 6.3 ]] || [[ $CENTOS_REL == 6.4 ]] || [[ $CENTOS_REL == 6.5 ]] || [[ $CENTOS_REL == 6.6 ]] || [[ $CENTOS_REL == 6.7 ]] || [[ $CENTOS_REL == 6.8 ]] || [[ $CENTOS_REL == 6.9 ]] || [[ $CENTOS_REL == 7.0 ]] || [[ $CENTOS_REL == 7.1 ]] || [[ $CENTOS_REL == 7.2 ]] || [[ $CENTOS_REL == 7.3 ]]; then
echo -e "[\033[32mOK\e[0m] The operating system is CentOS $CENTOS_REL..."
else echo -e "[\033[31mKO\e[0m] The operating system is not supported!!!"
fi
elif [[ -f $FEDORA_OS_RELEASE ]] ; then
FEDORA_REL=`cat /etc/fedora-release|grep Fedora|sed 's/[^0-9]//g'`
if [[ $FEDORA_REL == 19 ]] || [[ $FEDORA_REL == 20 ]] || [[ $FEDORA_REL == 21 ]] ; then
echo -e "[\033[32mOK\e[0m] The operating system is Fedora $FEDORA_REL..."
else echo -e "[\033[31mKO\e[0m] The operating system is not supported!!!"
fi
elif [[ -f $REDHAT_OS_RELEASE ]] && [[ $IS_REDHAT -eq 0 ]] ; then
REDHAT_REL=`cat /etc/redhat-release|grep Red |sed 's/[^0-9.]//g'|awk -F "." '{ print $1"."$2 }'`
if [[ $REDHAT_REL == 5.1 ]] || [[ $REDHAT_REL == 5.2 ]] || [[ $REDHAT_REL == 5.3 ]] || [[ $REDHAT_REL == 5.4 ]] || [[ $REDHAT_REL == 5.5 ]] || [[ $REDHAT_REL == 5.6 ]] || [[ $REDHAT_REL == 5.7 ]] || [[ $REDHAT_REL == 5.8 ]] || [[ $REDHAT_REL == 5.9 ]] || [[ $REDHAT_REL == 5.10 ]] || [[ $REDHAT_REL == 5.11 ]] || [[ $REDHAT_REL == 6.1 ]] || [[ $REDHAT_REL == 6.2 ]] || [[ $REDHAT_REL == 6.3 ]] || [[ $REDHAT_REL == 6.4 ]] || [[ $REDHAT_REL == 6.5 ]] || [[ $REDHAT_REL == 6.6 ]] || [[ $REDHAT_REL == 6.7 ]] || [[ $REDHAT_REL == 6.8 ]] || [[ $REDHAT_REL == 6.9 ]] || [[ $REDHAT_REL == 7.0 ]] || [[ $REDHAT_REL == 7.1 ]] || [[ $REDHAT_REL == 7.2 ]] || [[ $REDHAT_REL == 7.3 ]]; then
echo -e "[\033[32mOK\e[0m] The operating system is Red Hat $REDHAT_REL..."
else echo -e "[\033[31mKO\e[0m] The operating system is not supported!!!"
fi
else
echo -e "[\033[31mKO\e[0m] The operating system is not supported!!!"
fi
}
vm_checks() {
uname -a|grep x86_64 > /dev/null 2>&1
OS_X86_64=$?
if [[ $OS_X86_64 -eq 0 ]] ; then
echo -e "[\033[32mOK\e[0m] The kernel of the OS is x86_64!"
echo -e "[\033[33mWARNING\e[0m]: Some restrictions are applied with some specific kernel releases."
else echo -e "[\033[31mKO\e[0m] The Operating System is not x86_64!"
fi
ROOT_DISK_SIZE=`fdisk -l 2>/dev/null|grep -m1 Disk|awk '{print $5}'`
if [[ $ROOT_DISK_SIZE -lt 1099511627776 ]] ; then
echo -e "[\033[32mOK\e[0m] The root volume disk size is less than 1TB!"
else echo -e "[\033[31mKO\e[0m] The root volume disk size is more than 1TB!"
fi
ROOT_DISK=`fdisk -l 2>/dev/null|grep -m1 Disk|awk '{print $2}'|tr -d ':'`
fdisk -l $ROOT_DISK 2>/dev/null |grep gpt > /dev/null 2>&1
IS_GPT=$?
if [[ $IS_GPT -eq 0 ]] ; then
echo -e "[\033[31mKO\e[0m] The GUID Partition Table (GPT) disk import is not supported!!!"
else echo -e "[\033[32mOK\e[0m] The Partition table appears to be MBR."
fi
ROOT_FS_SPACE_AVAIL=`df -k / |grep "/$"|awk '{ print $4}'`
if [[ $ROOT_FS_SPACE_AVAIL == *"%" ]]; then
ROOT_FS_SPACE_AVAIL=`df -k / |grep "/$"|awk '{ print $3}'`
fi
BOOT_FS_SPACE_AVAIL=`df -k /boot|grep "/$" |awk '{ print $4}'`
if [[ $BOOT_FS_SPACE_AVAIL == *"%" ]]; then
BOOT_FS_SPACE_AVAIL=`df -k /boot |grep "/$"|awk '{ print $3}'`
fi
ETC_FS_SPACE_AVAIL=`df -k /etc|grep "/$" |awk '{ print $4}'`
if [[ $ETC_FS_SPACE_AVAIL == *"%" ]]; then
ETC_FS_SPACE_AVAIL=`df -k /etc |grep "/$"|awk '{ print $3}'`
fi
TMP_FS_SPACE_AVAIL=`df -k /tmp|grep "/$" |awk '{ print $4}'`
if [[ $TMP_FS_SPACE_AVAIL == *"%" ]]; then
TMP_FS_SPACE_AVAIL=`df -k /tmp |grep "/$"|awk '{ print $3}'`
fi
VAR_FS_SPACE_AVAIL=`df -k /var|grep "/$" |awk '{ print $4}'`
if [[ $VAR_FS_SPACE_AVAIL == *"%" ]]; then
VAR_FS_SPACE_AVAIL=`df -k /var |grep "/$"|awk '{ print $3}'`
fi
USR_FS_SPACE_AVAIL=`df -k /usr|grep "/$" |awk '{ print $4}'`
if [[ $USR_FS_SPACE_AVAIL == *"%" ]]; then
USR_FS_SPACE_AVAIL=`df -k /usr |grep "/$"|awk '{ print $3}'`
fi
if [[ $ROOT_FS_SPACE_AVAIL -gt 256000 ]] && [[ $BOOT_FS_SPACE_AVAIL -gt 256000 ]] && [[ $ETC_FS_SPACE_AVAIL -gt 256000 ]] && [[ $TMP_FS_SPACE_AVAIL -gt 256000 ]] && [[ $VAR_FS_SPACE_AVAIL -gt 256000 ]] && [[ $USR_FS_SPACE_AVAIL -gt 256000 ]] ; then
echo -e "[\033[32mOK\e[0m] There is enough space to install EC2 drivers!"
else echo -e "[\033[31mKO\e[0m] It is needed at least 250MB of space available to install the EC2 drivers!"
fi
VMWARE_TOOLS_INST=`lsmod|grep vmw`
IS_VMWARE_TOOLS_INST=$?
if [[ $IS_VMWARE_TOOLS_INST -eq 0 ]] ; then
echo -e "[\033[31mKO\e[0m] VMware tools are installed on the system!"
else echo -e "[\033[32mOK\e[0m] VMware tools not installed."
fi
ACTIVE_ETH=`ifconfig -a |grep eth[0-9]|wc -l`
ACTIVE_EN=`ifconfig -a|grep en[a-z]|wc -l`
if [[ $ACTIVE_ETH == 1 ]] ; then
echo -e "[\033[32mOK\e[0m] Only one active eth adapter found!"
elif [[ $ACTIVE_EN == 1 ]] ; then
echo -e "[\033[32mOK\e[0m] Only one active en adapter found!"
else echo -e "[\033[31mKO\e[0m] Only one active adapter should be active to convert the VM!"
fi
#check for dhclient pid with pidof, if there return code is 0, therefore dhclient is running
DHCLIENT_RC=`pidof dhclient >> /dev/null ; echo $?`
#SLES using wickedd instead of dhclient
WICKEDD_RC=`pidof wickedd-dhcp4 >> /dev/null ; echo $?`
#if grep match "0.0.0.0:68 " and the return code is 0 means that dhclient is listening
DHCLIENT_NETSTAT=`netstat -na|grep -i '0.0.0.0:68 ' >> /dev/null; echo $?`
if [[ $DHCLIENT_RC == 0 || $WICKEDD_RC == 0 ]] && [[ $DHCLIENT_NETSTAT == 0 ]] ; then
echo -e "[\033[32mOK\e[0m] DHCP client is running"
else echo -e "[\033[31mKO\e[0m] dhcp must be enabled to import the vm correctly!" # enabled
fi
SSH_RUNNING=`ps aux|grep sshd|grep -v grep`
IS_SSH_RUNNING=$?
if [[ $IS_SSH_RUNNING -eq 0 ]] ; then
echo -e "[\033[32mOK\e[0m] The SSH daemon is up and running!"
else echo -e "[\033[31mKO\e[0m] Check the SSH is up and running!"
fi
IPTABLES_DROP=`iptables -L |grep -i drop`
IS_IPTABLES_DROP=$?
if [[ $IS_IPTABLES_DROP -eq 0 ]] ; then
echo -e "[\033[31mKO\e[0m] Found a drop in the iptables rules!"
echo -e "[\033[33mWARNING\e[0m]:Check iptables doesn't block SSH before you start the conversion!"
else echo -e "[\033[32mOK\e[0m] Not found any drop in the iptables!"
fi
CDROM_PRESENT=`dmesg | grep cdrom`
IS_CDROM_PRESENT=$?
CDRW_PRESENT=`dmesg | grep cd/rw`
IS_CDRW_PRESENT=$?
DVD_PRESENT=`dmesg | grep dvd`
IS_DVD_PRESENT=$?
WRITER_PRESENT=`dmesg | grep writer`
IS_WRITER_PRESENT=$?
if [[ $IS_CDROM_PRESENT -eq 0 ]] || [[ $IS_CDRW_PRESENT -eq 0 ]] || [[ $IS_DVD_PRESENT -eq 0 ]] || [[ $IS_WRITER_PRESENT -eq 0 ]] ; then
echo -e "[\033[31mKO\e[0m] CD-ROM or DVD device detected! Please remove it!"
else echo -e "[\033[32mOK\e[0m] No CD-ROM or DVD device detected."
fi
}
check_grub() {
GRUB_ROOT_DEVICE=$(sudo cat /proc/cmdline | awk 'match($0, /root=.*/) { print substr($0, RSTART, RLENGTH) }' | awk '{print $1}')
if [[ $(echo ${GRUB_ROOT_DEVICE} | awk -F'=' '{print NF}') == 3 ]]; then
DEV_DEF=$(echo ${GRUB_ROOT_DEVICE} | awk -F'=' {'print $3'})
echo -e "[\033[32mOK\e[0m] The currently active root volume is defined by LABEL or UUID: ${DEV_DEF} which is a good practice for imports."
elif [[ $(echo ${GRUB_ROOT_DEVICE} | awk -F'=' '{print NF}') == 2 ]]; then
DEV_DEF=$(echo ${GRUB_ROOT_DEVICE} | awk -F'=' {'print $2'})
echo -e "[\033[33mWARNING\e[0m]: The current kernel boot command is referencing the root volume using block device IDs. In some cases, this can cause issues with the import process. We recommend using the UUID instead where possible."
fi
}
check_fs() {
ROOT_FS_TYPE=$(df -T / | tail -1 | awk '{print $2}')
if [[ ${ROOT_FS_TYPE} == "ext"* ]]; then
FS_CHECK_DATE=$(tune2fs -l $(mount | grep 'on / ' | awk '{print $1}') | grep 'Last checked' | awk 'match($0, /Sat.*|Sun.*|Mon.*|Tue.*|Wed.*|Thu.*|Fri.*/) { print substr($0, RSTART, RLENGTH) }')
FS_SHORT_DATE=$(date -d "${FS_CHECK_DATE}" +%s)
CURR_SHORT_DATE=$(date +%s)
DATEDIFF=$(echo \(${CURR_SHORT_DATE}-${FS_SHORT_DATE}\)/60/60/24 | bc)
if [[ "${DATEDIFF}" -gt 15 ]]; then
echo -e "[\033[33mWARNING\e[0m] Your EXT root filesystem has not been checked in more than 2 weeks - please run fsck before importing your VM."
fi
else
echo -e "[\033[32mOK\e[0m] Please ensure you run a filesystem check against the root volume before importing your VM."
fi
}
check_fstab() {
root_dev=$(mount | grep 'on / ' | awk '{print $1}')
root_uuid=$(blkid | grep ${root_dev} | grep -ow 'UUID=\S*' | sed s/\"//g)
root_label=$(blkid | grep ${root_dev} | grep -ow 'LABEL=\S*' | sed s/\"//g)
for block_dev in $(cat /etc/fstab | grep '^/dev' | awk '{print $1}' | sed s/\"//g)
do
if [[ "${block_dev}" == "${root_dev}" ]]; then
true
else
secondary_dev_array+=" ${block_dev}"
fi
done
for block_label in $(cat /etc/fstab | grep '^LABEL' | awk '{print $1}' | sed s/\"//g)
do
if [[ "${block_label}" == "${root_label}" ]]; then
true
else
secondary_label_array+=" ${block_label}"
fi
done
for block_uuid in $(cat /etc/fstab | grep '^UUID' | awk '{print $1}' | sed s/\"//g)
do
if [[ "${block_uuid}" == "${root_uuid}" ]]; then
true
else
secondary_uuid_array+=" ${block_uuid}"
fi
done
if [[ -n ${secondary_dev_array} ]]; then
for dev in ${secondary_dev_array[@]}
do
echo -e "[\033[31mKO\e[0m]: Secondary volume configured in /etc/fstab for this VM: ${dev} - please ensure they are included
in the import definition or comment them out of the fstab when preparing the VM for import. "
done
fi
if [[ -n ${secondary_label_array} ]]; then
for dev in ${secondary_label_array[@]}
do
echo -e "[\033[33mWARNING\e[0m]: Secondary volume configured in /etc/fstab for this VM: ${dev} - please ensure they are included
in the import definition or comment them out of the fstab when preparing the VM for import. "
done
fi
if [[ -n ${secondary_uuid_array} ]]; then
for dev in ${secondary_uuid_array[@]}
do
echo -e "[\033[33mWARNING\e[0m]: Secondary volume configured in /etc/fstab for this VM: ${dev} - please ensure they are included
in the import definition or comment them out of the fstab when preparing the VM for import. "
done
fi
if [[ -z ${secondary_label_array} && -z ${secondary_label_array} && -z ${secondary_uuid_array} ]]; then
echo -e "[\033[32mOK\e[0m]: It seems only the root volume is defined in /etc/fstab. "
fi
}
print_advice() {
echo " "
echo "For further informations about the prerequisites of the VM Import check:"
echo "http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/VMImportPrerequisites.html"
echo " "
}
set_defaults
splash_screen
check_running_user
check_os
vm_checks
check_grub
check_fs
check_fstab
print_advice
exit
Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment