Issues with CentOS 6 and EPEL

I was running into some issues with the EPEL repo on CentOS 6.x. I had just installed the OS and the EPEL/remi repos and whilst trying to search for a package the same error kept repeating.

Cannot retrieve metalink for repository: epel

and it kept failing each time.

The fix involved editing the EPEL repo and making a simple change from https to http. Why or how this broke is beyond me, but this fix may help someone else.

Assuming you have root or su:

1. Edit the epel repo
nano /etc/yum.repos.d/epel.repo

Find line:
mirrorlist=https://mirrors.fedoraproject.org/metalink?repo=epel-6&arch=$basearch

Change to
mirrorlist=http://mirrors.fedoraproject.org/metalink?repo=epel-6&arch=$basearch

Save and exit.

2. Clean yum
yum clean all


That did it for me!

Cheers,
noveck 

InnoDB Backup Scripts

Following up on my earlier post about converting the storage engine on a MySQL Database from MyISAM to InnoDB, I'd like to share the following scripts with backup rotation built in.
The next blog entry should be a step-by-step restore procedure using the actual backups below.

Test Environment:
CentOS 5.x
MySQL 5.0 (distro version)
Percona Xtrabackup 2.0.3 installed as per this howto

Backup Directory Structure
/bkp
/bkp/Hourly
/bkp/Daily
/bkp/Monthly

Script Output Log Directory
/tmp

Script Directory
/scripts

Disclaimer: I do not guarantee this is the BEST way of doing this, but it works for me. Copy and paste the following into a *.sh file in your scripts directory. Ensure the executable flag is set

chmod +x scriptname.sh

Actual Scripts
innodb_backup_monthly.sh

#!/bin/sh
# An InnoDB Backup Script to backup database Monthly
#
# Written by: Noveck Gowandan
# 02-10-2012
# Version 1.1
# Modified filename convention
# Uses tar-gzip to further compress final archive
# Added script timer and modified output to log time
# Start timer

time_start=`date +%s`

# Go to backup location and create Monthly folder with datestamp
cd /bkp/
mkdir M_db_$(date +%Y%m%d)

# Execute backup using innobackupex and send to folder created previously
innobackupex --defaults-file=/etc/my.cnf --user=****** --password=****** --databases=mydbname /bkp/M_db_$(date +%Y%m%d)

# Compress backup into a tarball
tar czf mydbname_$(date +%Y%m%d).tgz M_db*

# Backup rotation section
rm -rf M_db*
rm -rf /bkp/Monthly/$(date +"%B")
mkdir /bkp/Monthly/$(date +"%B")
mv mydbname* /bkp/Monthly/$(date +"%B")

# Stop timer and calculate total time
time_end=`date +%s`
total_time=`expr $(( $time_end - $time_start ))`

# Log output: datestamp and time takes to execute
echo "____________" >> /tmp/db_backup_monthly.log
date  >> /tmp/db_backup_monthly.log
echo "Execution Time was $total_time seconds." >> /tmp/db_backup_monthly.log

 innodb_backup_monthly.sh

 #!/bin/sh
# An InnoDB Backup Script to backup database DAILY
#
# Written by: Noveck Gowandan
# 02-10-2012
# Version 1.1
# Modified filename convention
# Uses tar-gzip to further compress final archive
# Added script timer and modified output to log time

# Start timer
time_start=`date +%s`

# Go to backup location and create Daily folder with datestamp
cd /bkp/
mkdir D_db_$(date +%Y%m%d)

# Execute backup using innobackupex and send to folder created previously
innobackupex --defaults-file=/etc/my.cnf --user=****** --password=****** --databases=mydbname /bkp/D_db_$(date +%Y%m%d)

# Compress backup into a tarball
tar czf mydbname_$(date +%Y%m%d).tgz D_db*

# Backup rotation section
rm -rf D_db*
rm -rf /bkp/Daily/$(date +"%A")
mkdir /bkp/Daily/$(date +"%A")
mv mydbname* /bkp/Daily/$(date +"%A")

# Stop timer and calculate total time
time_end=`date +%s`
total_time=`expr $(( $time_end - $time_start ))`

# Log output: datestamp and time takes to execute
echo "____________" >> /tmp/db_backup_daily.log
date  >> /tmp/db_backup_daily.log
echo "Execution Time was $total_time seconds." >> /tmp/db_backup_daily.log

innodb_backup_hourly.sh

#!/bin/sh
# An InnoDB Backup Script to backup database HOURLY
#
# Written by: Noveck Gowandan
# 02-10-2012
# Version 1.1
# Modified filename convention
# Added script timer and modified output to log time

# Start timer
time_start=`date +%s`

# Go to backup location and create Hourly folder with datestamp
cd /bkp/
mkdir H_db_$(date +%Y%m%d)

# Execute backup using innobackupex and send to folder created previously
innobackupex --defaults-file=/etc/my.cnf --user=****** --password=****** --databases=mydbname /bkp/H_db_$(date +%Y%m%d)

# Backup rotation section
rm -rf /bkp/Hourly/$(date +"%H")
mkdir /bkp/Hourly/$(date +"%H")
mv H_db* /bkp/Hourly/$(date +"%H")

# Stop timer and calculate total time
time_end=`date +%s`
total_time=`expr $(( $time_end - $time_start ))`

# Log output: datestamp and time takes to execute
echo "____________" >> /tmp/db_backup_hourly.log
date  >> /tmp/db_backup_hourly.log
echo "Execution Time was $total_time seconds." >> /tmp/db_backup_hourly.log