Tag Archives: redirect

Bash log redirect / stdout and stderr

# For cron/crontab
*/5 * * * * /path/myscript.sh > /dev/null 2>&1

==================================================
# Redirect ALL output/error automatically to a file 
# AND print to console too
LOG_OUTPUT=output_error.log

exec 1> >(tee -i ${LOG_OUTPUT}) 2>&1

==================================================
# *ALL* redirected to the log files: NO console output at all
LOG_OUTPUT=output.log

exec 1>>${LOG_OUTPUT} 2>&1

==================================================
# All redirected to 2 different log files
LOG_OUTPUT=etup_output.log
LOG_ERROR=setup_error.log

exec 3>&1 1>>${LOG_OUTPUT}
exec 2>>${LOG_ERROR}

# use 'P "my message"' instead of echo
P () {
# Print on console AND file
echo -e "\n$1" | tee /dev/fd/3

# Print ONLY on console
#echo -e "\n$1" 1>&3
}

==================================================
# ALL stdout and stderr to $LOG_OUTPUT
# Also stderr to $LOG_ERROR (for extra checks)
# P function to print to the console AND logged into $LOG_OUTPUT
LOG_OUTPUT=output.log
LOG_ERROR=error.log

exec 3>&1 1>>${LOG_OUTPUT}
exec 2> >(tee -i ${LOG_ERROR}) >> ${LOG_OUTPUT}

# use 'P "my message"' instead of echo
P () {
# Print on console AND file
echo -e "$1" | tee /dev/fd/3

# Print ONLY on console
#echo -e "\n$1" 1>&3
}

# use 'P "my message"' instead of echo to print in BLUE
P () {
BLUE='\033[1;34m'
NC='\033[0m' # No Color
echo -e "\n${BLUE}${1}${NC}" | tee /dev/fd/3
}

# For cron/crontab

*/5 * * * * /path/myscript.sh > /dev/null 2>&1

==================================================

# Redirect ALL output/error automatically to a file

# AND print to console too

LOG_OUTPUT=output_error.log

exec 1> >(tee -i ${LOG_OUTPUT}) 2>&1

==================================================

# *ALL* redirected to the log files: NO console output at all

LOG_OUTPUT=output.log

exec 1>>${LOG_OUTPUT} 2>&1

==================================================

# All redirected to 2 different log files

LOG_OUTPUT=etup_output.log

LOG_ERROR=setup_error.log

exec 3>&1 1>>${LOG_OUTPUT}

exec 2>>${LOG_ERROR}

# use 'P "my message"' instead of echo

P () {

# Print on console AND file

echo -e "\n$1" | tee /dev/fd/3

# Print ONLY on console

#echo -e "\n$1" 1>&3

}

==================================================

# ALL stdout and stderr to $LOG_OUTPUT

# Also stderr to $LOG_ERROR (for extra checks)

# P function to print to the console AND logged into $LOG_OUTPUT

LOG_OUTPUT=output.log

LOG_ERROR=error.log

exec 3>&1 1>>${LOG_OUTPUT}

exec 2> >(tee -i ${LOG_ERROR}) >> ${LOG_OUTPUT}

# use 'P "my message"' instead of echo

P () {

# Print on console AND file

echo -e "$1" | tee /dev/fd/3

# Print ONLY on console

#echo -e "\n$1" 1>&3

}

# use 'P "my message"' instead of echo to print in BLUE

P () {

BLUE='\033[1;34m'

NC='\033[0m' # No Color

echo -e "\n${BLUE}${1}${NC}" | tee /dev/fd/3

}

Apache ProxyPass for WordPress master-slave setup

Simple way

Ensure certain traffic goes to a certain server (master), you can use this:

<LocationMatch "^/wordpress/wp-admin/?.*>
ProxyPreserveHost On
ProxyPass http://ip.of.master.server/
</LocationMatch>

ProxyPreserveHost On

ProxyPass http://ip.of.master.server/

</LocationMatch>

For a better setup with Variables, just follow the… following steps 🙂

Step One: Configure Environment

We need to setup some environment variables to get this to work correctly.
Add the following to your environment on the slave server(s):

RHEL/CentOS: /etc/sysconfig/httpdi

OPTIONS="-DSLAVE"
export MASTER_SERVER="SERVERIP HERE"

1 2	OPTIONS="-DSLAVE" export MASTER_SERVER="SERVERIP HERE"

Ubuntu: /etc/apache2/envvars

export APACHE_ARGUMENTS="-DSLAVE"
export MASTER_SERVER="SERVERIP HERE"

1 2	export APACHE_ARGUMENTS="-DSLAVE" export MASTER_SERVER="SERVERIP HERE"

Step Two: Configure your VirtualHost

In your VirtualHost configuration do something like the following.

<IfDefine SLAVE>
RewriteEngine On
ProxyPreserveHost On
ProxyPass /wp-admin/http://${MASTER_SERVER}/wp-admin/
ProxyPassReverse /wp-admin/http://${MASTER_SERVER}/wp-admin/

RewriteCond %{REQUEST_METHOD} =POST
RewriteRule . http://${MASTER_SERVER}%{REQUEST_URI} [P]
</IfDefine>

RewriteEngine On

ProxyPreserveHost On

ProxyPass /wp-admin/http://${MASTER_SERVER}/wp-admin/

ProxyPassReverse /wp-admin/http://${MASTER_SERVER}/wp-admin/

RewriteCond %{REQUEST_METHOD} =POST

RewriteRule . http://${MASTER_SERVER}%{REQUEST_URI} [P]

</IfDefine>

Apache Rewrite rules

Rewrite rules examples:

This can be added in vhost configuration OR in .htaccess file

How to rewrite all web request on my site without www to www.domain.com

RewriteCond %{HTTP_HOST} !^www\.example\.com$ [NC]
RewriteRule (.*) http://www.example.com$1 [R,L]

1 2	RewriteCond %{HTTP_HOST} !^www\.example\.com$ [NC] RewriteRule (.*) http://www.example.com$1 [R,L]

How to redirect all web requests on port 80 (or HTTP) to port 443 (HTTPS)

RewriteCond %{SERVER_PORT} !^443$
RewriteRule ^/(.*) https://%{SERVER_NAME}/$1 [L,R]

1 2	RewriteCond %{SERVER_PORT} !^443$ RewriteRule ^/(.*) https://%{SERVER_NAME}/$1 [L,R]

How to disable TRACE and TRACK methods on Apache

RewriteCond %{REQUEST_METHOD} ^(TRACE|TRACK)
RewriteRule .* - [F]

1 2	RewriteCond %{REQUEST_METHOD} ^(TRACE\|TRACK) RewriteRule .* - [F]

How to exclude mod_status from being rewritten by existing rules (placed before the problem rule)

RewriteCond %{REQUEST_URI} !=/server-status

1	RewriteCond %{REQUEST_URI} !=/server-status

How do I redirect all web requests on www.mysite.net/web to www.mysite.net/sect1/web

RewriteCond %{http_host} ^[www\.]*example\.com
RewriteRule ^web(/)?$ /sect1/web [R=301,L]

1 2	RewriteCond %{http_host} ^[www\.]*example\.com RewriteRule ^web(/)?$ /sect1/web [R=301,L]

Rewrite all non-www to www

RewriteEngine On
RewriteCond %{HTTP_HOST} !^www\. [NC]
RewriteRule ^(.*)$ http://www.%{HTTP_HOST}%{REQUEST_URI} [R=301,L]

RewriteEngine On

RewriteCond %{HTTP_HOST} !^www\. [NC]

RewriteRule ^(.*)$ http://www.%{HTTP_HOST}%{REQUEST_URI} [R=301,L]

Force all URLs to be lowercase

RewriteEngine On
RewriteMap lc int:tolower
RewriteCond %{REQUEST_URI} [A-Z]
RewriteRule (.*) ${lc:$1} [R=301,L]

RewriteEngine On

RewriteMap lc int:tolower

RewriteCond %{REQUEST_URI} [A-Z]

RewriteRule (.*) ${lc:$1} [R=301,L]

Apache not www to www redirects

not www to www

RewriteCond %{HTTP_HOST} !^www\.
RewriteRule (.*) http://www.%{HTTP_HOST}%{REQUEST_URI} [L,R=301]

1 2	RewriteCond %{HTTP_HOST} !^www\. RewriteRule (.*) http://www.%{HTTP_HOST}%{REQUEST_URI} [L,R=301]

Excluding ‘mysubdomain’

RewriteCond %{HTTP_HOST} !^(www|mysubdomain)\.
RewriteRule (.*) https://www.%{HTTP_HOST}%{REQUEST_URI} [L,R=301]

1 2	RewriteCond %{HTTP_HOST} !^(www\|mysubdomain)\. RewriteRule (.*) https://www.%{HTTP_HOST}%{REQUEST_URI} [L,R=301]

WordPress Apache ProxyPass

Option 1

Ensure certain traffic goes to a certain server, you can use this:

<LocationMatch "^/wordpress/wp-admin/?.*>
        ProxyPreserveHost On
        ProxyPass http://ip.of.master.server/
</LocationMatch>

ProxyPreserveHost On

ProxyPass http://ip.of.master.server/

</LocationMatch>

Option 2

Step One: Configure Environment

We need to setup some environment variables to get this to work correctly.
Add the following to your environment on the slave server(s):

RHEL/CentOS: /etc/sysconfig/httpd

OPTIONS="-DSLAVE"
export MASTER_SERVER="SERVERIP HERE"

1 2	OPTIONS="-DSLAVE" export MASTER_SERVER="SERVERIP HERE"

Ubuntu: /etc/apache2/envvars

OPTIONS="-DSLAVE"
export MASTER_SERVER="SERVERIP HERE"

1 2	OPTIONS="-DSLAVE" export MASTER_SERVER="SERVERIP HERE"

Step Two: Configure your VirtualHost

In your VirtualHost configuration do something like the following.

RewriteEngine On
ProxyPreserveHost On
ProxyPass /wp-admin/ http://${MASTER_SERVER}/wp-admin/
ProxyPassReverse /wp-admin/ http://${MASTER_SERVER}/wp-admin/

RewriteCond %{REQUEST_METHOD} =POST
RewriteRule . http://${MASTER_SERVER}%{REQUEST_URI} [P]

RewriteEngine On

ProxyPreserveHost On

ProxyPass /wp-admin/ http://${MASTER_SERVER}/wp-admin/

ProxyPassReverse /wp-admin/ http://${MASTER_SERVER}/wp-admin/

RewriteCond %{REQUEST_METHOD} =POST

RewriteRule . http://${MASTER_SERVER}%{REQUEST_URI} [P]

My notepad

Chris' IT notes…

Tag Archives: redirect

Bash log redirect / stdout and stderr

Apache ProxyPass for WordPress master-slave setup

Simple way

Step One: Configure Environment

Step Two: Configure your VirtualHost

Apache Rewrite rules

Rewrite rules examples:

Apache not www to www redirects

WordPress Apache ProxyPass

Option 1

Option 2

Step One: Configure Environment

Step Two: Configure your VirtualHost