Server :: User Privileges In Mysql Replication
Sep 27, 2010
Might this is silly question but I am not much familiar to database.I am doing master slave Mysql replication for load balancing. On master server different database has different user privileges. I create backup using mysqldump command and restore on slave server instead of using load data from master; command.When i replicate database from master to slave will i require to set user privileges same as master ?One more question: How to lock all database in mysql?
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Apr 5, 2010
If I have 2 MySQL server and I want to replicate their database to only 1 server, is it possible? I cannot afford to have master-to-master only because I still need to replicate one more machine but I do not have anymore more machine for replication so I'm thinking if these 2 MySQL server can be replicate to only 1 machine. If this is not possible, I guess I've no choice but to have two mysql daemon on that machine
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Jun 21, 2010
I am looking into setting up replication in a production environment but currently this is on two test machines. I am following the documentation at [URL] but I am unable to get past "16.1.1.10 Setting the Master Configuration on the Slave". When I do the CHANGE MASTER TO I am getting a syntax error for some reason. What am I doing wrong? These servers run "CentOS release 5.5 (Final)" and "MySQL 5.0.77-log Source distribution" installed via yum. The only changes from default are that I created a single database on the master before doing the table lock and dump, then everything else has been done exactly to what the documentation states, but is still failing.
The option skip-networking is not in the config file on either server and neither one runs SELinux or any firewall.
mysql> CHANGE MASTER TO
-> MASTER_HOST='192.168.1.220'
-> MASTER_USER='repl'
-> MASTER_PASSWORD='removed'
[Code]....
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Jul 20, 2010
I Installed the maintained package, Day one everything worked fine, I set a dummy database and work on it from VM windows. Day two weird errors, I searched around couldn't find the problem, the error was related to The root user losing privileges. I don't remember the exact error. So I decided to Completely remove the DB with apt-get remove mysql-Server-5.1. It gets stuck during the uninstall, I left the machine for a day and a half to uninstall mysql. I realized it was no use, I tried to Restart and try again, but I am getting the same thing.
Code:
finito@finito-desktop:~$ sudo apt-get remove mysql-server-5.1
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following packages were automatically installed and are no longer required:
dbconfig-common libhtml-template-perl mysql-server-core-5.1 libaprutil1-ldap
apache2-mpm-prefork apache2-utils libmcrypt4 apache2.2-common libt1-5
libaprutil1-dbd-sqlite3 apache2.2-bin wwwconfig-common php5-common
javascript-common libjs-mootools
Use 'apt-get autoremove' to remove them.
The following packages will be removed:
mysql-server-5.1
0 upgraded, 0 newly installed, 1 to remove and 0 not upgraded.
1 not fully installed or removed.
After this operation, 15.7MB disk space will be freed.
Do you want to continue [Y/n]? y
(Reading database ... 231901 files and directories currently installed.)
Removing mysql-server-5.1 ...
it stays stuck at Removing mysql-server-5.1 ...
I can't progress I am at the brink now, my only option right now is format, but I don't wanna do that. This setup is almost 5 years old and I have gone with many ups and downs with it. From Windows to 8.04 to 8.10 to 9.04 to 9.10 to now 10.04 each year loving the resilience of Ubuntu and the Linux architecture. I don't want to believe that this has killed my spree.
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Aug 12, 2010
I started over combining the first parts of this guide: [URL]..ubuntu8.04 (Only the first few parts in terms of configuration and naming). Then I used this guide: [URL]..Surprisingly enough all steps worked.
1. Now I need to set up LAMP servers with MySQL master/slave replication and Apache rsync.
2. Next i need to add BIND to both my Load Balancers with master/slave backup and replication...
Are there any guides to look at to follow on these? Can tou point me to the right direction for BIND with replication.
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Oct 15, 2010
One user in my company wants to run some flush cache queries on a MySql database, it needs "reload" privileges of Administration, how secure is to give this rights to a normal user ?
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Oct 16, 2010
I'm using ubuntu 10.04. Apache server is associated with www-data.I frequently run into problems editing or deleting files created by a cgi script, as they have ownership of www-data:www-data.How can I safely modify my system so that the output files are editable or deletable by user tim?
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Sep 12, 2010
i had configured a MySQl Replication Server with 2 DB Servers.Now we are planning to implement a failover Scenario.If Master fails The slave should act as a Master and we have a addition server.It will be going to act as slve.i had mentioned the points below..
Replication
(Master Server)----->----(Slave Server)-----------(Additional Server)
DBS 1 DBS 2 DBS 3
1.Replication is made between Master (DBS 1) and Slave (DBS 2) (successfully done)
2.If Master (DBS 1) failed Slave (DBS 2) should act as a Master and Additional Server (DBS 3) needs to be Slave
3.Whenever Orginal Master (DBS 1) became online the current Master ie ..Slave (DBS 2) should go back to Slave position and all lost data will be replicated to Master DBS 1.
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Jun 30, 2010
I configured a FTP Server on Fedora Now I want to create a user for FTP Server which has no privileges to access any things outside his home directory .
Username is "Test1"
Home directory is /var/ftp/Test1
chmod 700 /var/ftp/Test1
chown Test1 /var/ftp/Test1
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Aug 2, 2010
I'm trying to setup wordpress on my server, which of course I need mysql for. I setup a database the other day, which worked perfectly, but I had to start again as I put some information in wrong. Now, I can create a database fine, but when I run
Code:
GRANT ALL ON wordpress.* TO wordpress@localhost IDENTIFIED BY "password";
I get the output:
[code]...
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Aug 8, 2011
I have two computers (one tower, one laptop). On both the computers, I have apache & PHP & mysql running, so i can program/script anywhere I like. With a simple sync'ing program, the PHP scripts are synced between the PC's, thought the databases arent. Therefor I'm looking for a method to sync (replicate) the databases between the PC's. thought after setting up some configuration, i'm stuck... now with how to, but what to
Option 1) Multi-master replication between the PC and the laptop. With this setup, the database can ONLY sync once both the devices are turned on. Also it can only sync if they are turned on on my LAN, since they do not have an external static IP address. if I turn on both PC's on my LAN, with static IP's (from the DHCP server), this option will work. Thought, I basically never have both pc's turned on in my own home... cuz i can use only one at the time anyway.So I was thinking of another setup
Option 2) Multi-master replication with: online Server, PC and Laptop. The server basically contains the most up to date database. for example, the laptop updates the server and the server can update the PC later, once the PC is turned on. Also the other way around, the PC can update the server which can than update the Laptop.
There is, if i'm correct, only one problem: the only multi master replications setups I found, use a circulair setup... (1 updates 2, 2 updates 3, 3 updates 1) What I need is to have the PC update the server, but ALSO have the server update the PC (same for the laptop)
than there is another (little) problem: the PC and laptop cannot be reached from behind the modem, nor do they have a static IP. My question: Is it possible to sync the server with the laptop (that has no static IP), the laptop with the server (that has a static IP), and the same for the PC
PC <====> Server <====> Laptop
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Sep 15, 2010
I had Configured a MySQL Master-Slave replication.It seems that the binary logs steals so much space of My storage.
i.)My Master
show master status;
+------------------+----------+--------------+------------------+
| File | Position | Binlog_Do_DB | Binlog_Ignore_DB |
+------------------+----------+--------------+------------------+
| mysql-bin.000144 | 475823 | | |
+------------------+----------+--------------+------------------+
1 row in set (0.00 sec)
ii.)My Slave.
mysql> SHOW SLAVE STATUSG;
*************************** 1. row ***************************
Slave_IO_State: Waiting for master to send event
Master_Host: 10.277.55.141
[code]....
If i remove all binary files up tp mysql-bin.000144 using "PURGE",will it affect my existing database/any data loss.
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Oct 15, 2010
My MySQL replication slave failed,while reading a large size table from master.Thhe information from error.logError 'Unknown table engine 'InnoDB'' on query. Default database: 'test'. Query: I am sure that table is a Big size table..
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Nov 22, 2009
this idea to me right now seems stupid and impractical so I'm also looking for solutions outside of this one. I'm creating a set of highly available servers. They currently utilize pacemaker to manage a shared IP address, apache management, mysql management and also drbd handling. They currently replicate, properly failover and run fine. However, this is a shared web hosting setup and everytime a new user is added to the system a username and password is created and the httpd.conf file is updated for their site. I need a way to replicate those changes to the other server. For httpd.conf I'm pretty sure I can just stick it on the apache drbd resource and create a symbolic link. However, for the passwd and shadow files that is not a realistic solution.
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Aug 11, 2010
This applies to users of 10.04 (64 bit), but I would like to hear from those running 10.04 (32 bit) and 9.10 (64 or 32 bit).Would you be good enough to answer this question: Do you have an �enable scanner option� (or a variation of that phrase) in (GOTO) System-Administration-Users & Groups- [Your Admin Account]- Advanced Settings- User Privileges?It would be immensely helpful of you if you could do this and post me your answer.
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Jun 1, 2010
I have been reading about asterisk, I did some basic configuration, a small ivr, record messages.. but I was wondering how and what/where should I modify to use a database to save sip users and voicemail user..then we can add user/voicemail with php-myadmin I always search but I cant find about this configuration..
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Oct 2, 2010
Is there any reason for the mysql user to need bash shell?
From /etc/passwd:
Code:
mysql:x:100:103:MySQL server:/var/lib/mysql:/bin/bash
Will anything break if I change that to /bin/false?
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Jun 22, 2010
I'm using an older redhat system (2.6.9-22.ELsmp) here which is running an older mysql (server version: 4.1.12). I don't think that's the source of the problems. I believe that have understood things rightly when I say that the mysql root user is unrelated to the linux root user ... in my case I believe the root user to be the unix user mysql. So when I connect to the server (local host from a local terminal) I use:
Code:
-bash-3.00$ mysql -u mysql -p
and enter a blank password
This gets me on, however I seem unable to do anything like create database or alter privilege. I wonder if its related to my finding no database called mysql?
-bash-3.00$ mysql -u mysql -p
Enter password:
Welcome to the MySQL monitor. Commands end with ; or g.
Your MySQL connection id is 11 to server version: 4.1.12
Type 'help;' or 'h' for help. Type 'c' to clear the buffer.
mysql> show databases;
+----------+
| Database |
+----------+
| test |
+----------+
1 row in set (0.00 sec)
Although I understand that show databases will not show things I have no priv to see. Does this mean my settings for the users are all screwed? How do I rectify this situation? Some other (perhaps) useful information.
Code:
[root ~]# cat /etc/my.cnf
[mysqld]
datadir=/var/lib/mysql
socket=/var/lib/mysql/mysql.sock
# Default to using old password format for compatibility with mysql 3.x
# clients (those using the mysqlclient10 compatibility package).
old_passwords=1
[mysql.server]
user=mysql
basedir=/var/lib
[mysqld_safe]
err-log=/var/log/mysqld.log
pid-file=/var/run/mysqld/mysqld.pid
So my BASEDIR seems to be nothing like is suggested in the documentation at [URL].
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May 27, 2011
I'm using dovecot pop3 server in my website. I tried to create a virtual user system with mysql. But it didn't work. Next I tried to debug my work with reading of dovecot log. I enabled logging in it by changing this values in /etc/dovecot/conf.d/10-logging.conf:
Code:
log_path=/var/log/dov
auth_verbose = yes
auth_debug = yes
auth_debug_passwords = yes
After that I tried to login to the pop3 via telnet and it failed as usual. After I checked the log file (/var/log/dov), but it does not contain any information about that failed login. Only there was some information about starting up of dovecot! Does any body know that what is the problem and why dovecot doesn't log that?
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Apr 13, 2011
I've tried every manual there is for creating new MySQL users ... but without success.
I keep getting
Code:
ERROR 1045 (28000): Access denied for user 'test'@'localhost' (using password: YES) even though I just created it with all privileges ... WITH a password that I DO remember .
Fortunately I still have access via the MySQL root user (so I try not to disturb that user, because I have had computers with THAT account not accessible as well - even WITH resetting the password via skip-grant-tables).
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May 27, 2010
I just installed a MySQL server but for unknown reason im not able to set a root password.
CentOS 5.4 - 2.6.18-164.9.1.el5PAE
MySQL Ver 14.12 Distrib 5.0.77, for redhat-linux-gnu (i686) using readline 5.1
# yum install -y mysql mysql-server php-mysql
# service mysqld start
# mysql -u root
ERROR 1045 (28000): Access denied for user 'root'@'localhost' (using password: NO)
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Mar 14, 2011
I did something silly and changed my root user access for mysql access to Any from localhost using webmin. I get an access dented when i try to open up the mysql editing page on webmin. Can any of you tell me if there is a way to change it back to hosts=localhost I am using webmin 1.5.30 on Centos 5.5. I am hoping I can change it by command line or if I can access the config files and change it that way?
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Jun 12, 2010
I have a small problem on ubuntu 10.04, of which i know it can be solved. However, i'm not sure how to. The problem is; I need one user to be able to install updates, but not give it any other privileges. I have been messing around with the "sudoers" file in /etc a bit, and thought i needed to use the "NOPASSWD" But i'm not sure what to do after that.
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Jun 7, 2011
I think this goes here, but I'm not sure. I decided that XAMPP had been troublesome enough. MySQL never worked. So I decided to instal the LAMP stack offered by YaST. I went about installing it thinking that it would all work. But it seems that I was wrong. So I try to start mysql, and here's what I get:
Code:
the-matrix:~ # mysql start
ERROR 2002 (HY000): Can't connect to local MySQL server through socket '/var/mysql/mysql.sock' (2) or
Code:
the-matrix:~ # rcmysql start
Starting service MySQL warning: /var/mysql/mysql.sock didn't appear within 30 seconds
chmod: cannot access `/var/run/mysql/mysqld.pid': No such file or directory
[Code]...
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Aug 5, 2011
I need to create a user in Fedora Linux(15) which only has privileges to print documents.Our college issues a printer to each lab and I need to create a new user on my Fedora which only has privileges to print.Network sharing is not an option, so is there any way by which I can a restrict a user from executing any commands except the necessary printing commands?
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May 16, 2010
I accidentally promoted my initial account to admin and now I want to revert it but I don't remember the specific initial user privileges.So there are 2 questions:
1) First, is it safe to "downgrade" the account, logging in with another one? In general what's the best way to do it?
2) Could someone enter Administration->Users and Groups->[select initial account]->
Advanced Settings->User Privileges and list the privileges that are on by default?
I repeat I want the privileges of the initial account, which I suspect are above those of basic users (that are added later) and below admin...
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Nov 29, 2010
I configured a master DNS server 192.168.2.10 working OK. After that I configure a DNS Slave Server (92.168.2.11)the initial replication worked fine. This is test environment for my certification. I see how the zones from my master are transferred
zones in Master
training.com.db
transferred zone to my slave when I started named service
sec.training.com.db
That's Ok but I added some IPs to resolve to my master zone
webserver IN A 192.168.2.30
fileserver IN A 192.168.2.31
I restart/reload named on master and after that I go to slave and restart/reload but zones wuth the new values are not replicated. How long does it take for slave to take the changes from master? how is the procedure manual or automatic? I see If I go to slave and delete sec.training.com and restart named the zone with the changes is transferred but that is very manual... I am including my DNS Configuration so you can take a look.
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Aug 7, 2010
How do I create a new mysql user and a mysql database at the shell prompt?
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Jun 2, 2010
i am using liferay5.2(mysql included in the download pack) on fedora. while liferay is working fine but i cannot connect to mysql.i am getting the error
[
[root@localhost ~]# ln -s /var/lib/mysql/mysql.sock /tmp
[root@localhost ~]# /etc/init.d/mysqld start
Timeout error occurred trying to start MySQL Daemon.
[code]....
i didnt find the mysql.sock file in the location /var/lib/mysql/mysql.sock. i cannot find the portal-ext.properties file also to make intial settings.
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Apr 11, 2010
I have searched somewhat this forum but haven't yet found a similar post using the keywords I entered but perhaps there is already a similar post then please refer me to it.I am trying to add a user account "Guest" to allow people on my laptop without giving them access to vital parts of the computer. Basically, I want them to only be able to view their own home directory and access internet. Nothing more.I have set the group to "guest" and changed the other home directories of other users to owner access only.
Guest still has access to root and is still allowed to perform actions in various critical areas (deleting files from for example my Windows 7 partition). This I also want to prevent. I was thinking to set each directory's permissions to Owner and Group only and remove Others access.My questions:
1. Will this have any undesirable impact (programs of main user accounts not able to access certain directories)? For guest user I don't care as long as internet works.
2. When I start User Manager and disable for Guest all options except "access internet" (so I also disable access to CDROM), the guest can still access the CDROM. Does this mean the User Settings menu has no effect or is overruled by something?
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