MySQL: Difference between revisions

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= MySQL =
This page contains some notes on using the MySQL database server on a '''NST''' probe.


This page contains some notes on using the MySQL database server on a '''NST''' probe.
<noinclude>[[Category:Database]]</noinclude>
== Listing The Databases ==
 
The following script fragment demonstrates how one can list all of the databases currently available on a '''NST''' probe:
 
<pre class="programListing">
#!/bin/bash
 
# mysql_list
#
#  Lists all of the MySQL databases which currently exist.
 
mysql_list() {
  # Try to load MySQL access password from /etc/nst.conf
  [ -z "${NSTCTMYSQLPASSWD}" ] && [ -f /etc/nst.conf ] && . /etc/nst.conf;
  local PASSWD="--password${NSTCTMYSQLPASSWD+=}${NSTCTMYSQLPASSWD}";
 
  # Dump all databases
  echo "show databases;" | mysql \
      --host="127.0.0.1" \
      --user="root" \
      "${PASSWD}" | grep -v '^Database$';
}
 
# Dump all databases
mysql_list;
</pre>
 
 
Assuming one saved the above example script to the file: "'''/root/bin/listdb'''" one should be able to list all of the MySQL databases in the following manner:
 
<div class="screen">
  <div class="screenTitle">''Script:'' "listdb" Usage</div>
  <div class="userInput"><span class="prompt">[root@taco ~]# </span>/root/bin/listdb</div>
  <pre class="computerOutput">
fruity
geoinfo
inprotect
mysql
snort
snort_archive
test
</pre><div class="userInput"><span class="prompt">[root@taco ~]# </span></div>
</div>


== Backing Up A Database ==
== Backing Up and Restoring A Database ==


NOTE: The following code fragments need to be run from the '''root''' user account so that the MySQL password can be read from the file: "'''/etc/nst.conf'''".
NOTE: The following code fragments need to be run from the '''root''' user account so that the MySQL password can be read from the file: "'''/etc/nst.conf'''".
Line 9: Line 52:
The following script fragment demonstrates how one can backup a single database kept at the server:
The following script fragment demonstrates how one can backup a single database kept at the server:


<pre>
<pre class="programListing">
#!/bin/bash
#!/bin/bash


Line 23: Line 66:
   local PKGSAVEFILE="${PKGSAVEDIR}/${PKGDB}.sql.gz";
   local PKGSAVEFILE="${PKGSAVEDIR}/${PKGDB}.sql.gz";


   # Load MySQL access password
   # Try to load MySQL access password from /etc/nst.conf
   if [ "${MYSQLCTPASSWD}" == "" ]; then
   [ -z "${NSTCTMYSQLPASSWD}" ] && [ -f /etc/nst.conf ] && . /etc/nst.conf;
    . /etc/nst.conf || return 1;
   local PASSWD="--password${NSTCTMYSQLPASSWD+=}${NSTCTMYSQLPASSWD}";
   fi


   # Create save directory if it doesn't exist yet
   # Create save directory if it doesn't exist yet
Line 35: Line 77:
     --host="127.0.0.1" \
     --host="127.0.0.1" \
     --user="root" \
     --user="root" \
     --password="${NSTCTMYSQLPASSWD}" \
     "${PASSWD}" \
     --add-drop-database \
     --add-drop-database \
     --add-drop-table \
     --add-drop-table \
Line 49: Line 91:
The following script fragment demonstrates how to restore the database (WARNING: THIS REPLACES ANY EXISTING DATABASE HAVING THE SAME NAME):
The following script fragment demonstrates how to restore the database (WARNING: THIS REPLACES ANY EXISTING DATABASE HAVING THE SAME NAME):


<pre>
<pre class="programListing">
#!/bin/bash
#!/bin/bash


Line 66: Line 108:
   [ -f "${PKGSAVEFILE}" ] || return 1;
   [ -f "${PKGSAVEFILE}" ] || return 1;


   # Load MySQL access password
   # Try to load MySQL access password from /etc/nst.conf
   if [ "${MYSQLCTPASSWD}" == "" ]; then
   [ -z "${NSTCTMYSQLPASSWD}" ] && [ -f /etc/nst.conf ] && . /etc/nst.conf;
    . /etc/nst.conf || return 1;
   local PASSWD="--password${NSTCTMYSQLPASSWD+=}${NSTCTMYSQLPASSWD}";
   fi


   # Restore the database
   # Restore the database
Line 76: Line 117:
       --host="127.0.0.1" \
       --host="127.0.0.1" \
       --user="root" \
       --user="root" \
       --password="${NSTCTMYSQLPASSWD}";
       "${PASSWD}";
}
}


Line 85: Line 126:
Assuming saved the backup script to the file: "'''/root/bin/backupdb'''" and the restore script shown above to the file: "'''/root/bin/restoredb'''", the following command line demonstrates how one could backup and then restore the '''snort''' database.
Assuming saved the backup script to the file: "'''/root/bin/backupdb'''" and the restore script shown above to the file: "'''/root/bin/restoredb'''", the following command line demonstrates how one could backup and then restore the '''snort''' database.


<pre>
<div class="screen">
[root@taco ~]# '''/root/bin/backupdb snort'''
  <div class="screenTitle">''Script:'' "backupdb" & "restoredb" Usage</div>
[root@taco ~]# '''ls -l /var/nst/backup/db'''
  <div class="userInput"><span class="prompt">[root@taco ~]# </span>/root/bin/backupdb snort</div>
  <div class="userInput"><span class="prompt">[root@taco ~]# </span></div>
  <div class="userInput"><span class="prompt">[root@taco ~]# </span>ls -l /var/nst/backup/db</div>
<pre class="computerOutput">
total 8
total 8
-rw-r--r-- 1 root root 5407 Feb 28 07:23 snort.sql.gz
-rw-r--r-- 1 root root 5407 Feb 28 07:23 snort.sql.gz
[root@taco ~]# '''/root/bin/restoredb snort'''
[root@taco ~]#
</pre>
</pre>
  <div class="userInput"><span class="prompt">[root@taco ~]# </span>ls -l /var/nst/backup/db</div>
  <div class="userInput"><span class="prompt">[root@taco ~]# </span></div>
</div>

Latest revision as of 07:17, 4 March 2007

This page contains some notes on using the MySQL database server on a NST probe.

Listing The Databases

The following script fragment demonstrates how one can list all of the databases currently available on a NST probe: 

#!/bin/bash

# mysql_list
#
#   Lists all of the MySQL databases which currently exist.

mysql_list() {
  # Try to load MySQL access password from /etc/nst.conf
  [ -z "${NSTCTMYSQLPASSWD}" ] && [ -f /etc/nst.conf ] && . /etc/nst.conf;
  local PASSWD="--password${NSTCTMYSQLPASSWD+=}${NSTCTMYSQLPASSWD}";

  # Dump all databases
  echo "show databases;" | mysql \
      --host="127.0.0.1" \
      --user="root" \
      "${PASSWD}" | grep -v '^Database$';
}

# Dump all databases
mysql_list;


Assuming one saved the above example script to the file: "/root/bin/listdb" one should be able to list all of the MySQL databases in the following manner:

Script: "listdb" Usage
[root@taco ~]# /root/bin/listdb
fruity
geoinfo
inprotect
mysql
snort
snort_archive
test
[root@taco ~]#

Backing Up and Restoring A Database

NOTE: The following code fragments need to be run from the root user account so that the MySQL password can be read from the file: "/etc/nst.conf".

The following script fragment demonstrates how one can backup a single database kept at the server: 

#!/bin/bash

# mysql_backup DBNAME BACKUPDIR
#
#   Function to backup MySQL database to specified backup directory.

mysql_backup() {
  # Name of database and directory to save backup under.
  local PKGDB="${1}";
  local PKGSAVEDIR="${2}";

  local PKGSAVEFILE="${PKGSAVEDIR}/${PKGDB}.sql.gz";

  # Try to load MySQL access password from /etc/nst.conf
  [ -z "${NSTCTMYSQLPASSWD}" ] && [ -f /etc/nst.conf ] && . /etc/nst.conf;
  local PASSWD="--password${NSTCTMYSQLPASSWD+=}${NSTCTMYSQLPASSWD}";

  # Create save directory if it doesn't exist yet
  [ -d "${PKGSAVEDIR}" ] || mkdir -p "${PKGSAVEDIR}" || return 1;

  # Dump the database
  mysqldump \
    --host="127.0.0.1" \
    --user="root" \
    "${PASSWD}" \
    --add-drop-database \
    --add-drop-table \
    --databases "${PKGDB}" \
    | gzip -c >| "${PKGSAVEFILE}";
}

# Backup database named "fruity" unless user specified different name on command line
mysql_backup "${1:-fruity}" "/var/nst/backup/db";


The following script fragment demonstrates how to restore the database (WARNING: THIS REPLACES ANY EXISTING DATABASE HAVING THE SAME NAME): 

#!/bin/bash

# mysql_restore DBNAME BACKUPDIR
#
#   Restores a MySQL database that was previously saved using the "mysql_backup" function.

mysql_restore() {
  # Name of database and directory where backup was saved
  local PKGDB="${1}";
  local PKGSAVEDIR="${2}";

  local PKGSAVEFILE="${PKGSAVEDIR}/${PKGDB}.sql.gz";

  # Verify backup exists
  [ -f "${PKGSAVEFILE}" ] || return 1;

  # Try to load MySQL access password from /etc/nst.conf
  [ -z "${NSTCTMYSQLPASSWD}" ] && [ -f /etc/nst.conf ] && . /etc/nst.conf;
  local PASSWD="--password${NSTCTMYSQLPASSWD+=}${NSTCTMYSQLPASSWD}";

  # Restore the database
  gzip -dc < "${PKGSAVEFILE}" | \
    mysql \
      --host="127.0.0.1" \
      --user="root" \
      "${PASSWD}";
}

# Restore database named "fruity" unless user specified different name on command line
mysql_restore "${1:-fruity}" "/var/nst/backup/db";

Assuming saved the backup script to the file: "/root/bin/backupdb" and the restore script shown above to the file: "/root/bin/restoredb", the following command line demonstrates how one could backup and then restore the snort database.

Script: "backupdb" & "restoredb" Usage
[root@taco ~]# /root/bin/backupdb snort
[root@taco ~]#
[root@taco ~]# ls -l /var/nst/backup/db
total 8
-rw-r--r-- 1 root root 5407 Feb 28 07:23 snort.sql.gz
[root@taco ~]# ls -l /var/nst/backup/db
[root@taco ~]#
Retrieved from "https://wiki.networksecuritytoolkit.org/nstwiki/index.php?title=MySQL&oldid=183"