Questions tagged [master-slave]

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Using bind 9.11 with Masters Only

a little bit of background Information before asking the question: Our current setup is: 1 Master bind and 1 Slave bind in Datacenter A 2 Slave binds in Datacenter B 2 Unbounds in Datacenter A 2 ...
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0answers
19 views

Multi-source replication is not accepting “channel” for replication filter

I'm trying to make a slave that will have database replication from two different master. When I'm trying to set replication filter based on the channel, MySQL server is throwing syntax error. I've ...
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0answers
15 views

How do you update services to talk to new IP in a master/slave database setup

I'm using postgresql. I have done a lot of reading into setting up redundant SQL setup and most of them boil to having a simple master-slave setup where the slave can become master at any point. Now ...
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1answer
49 views

bind9 not working when starting bind9 service but works when explicitly starting named

I have a really odd situation I don't fully understand. I have a master and slave DNS, I've checked the configuration, and no errors are returned. if I try to start bind9 as a service, it fails to ...
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1answer
185 views

Bind9 Slave not resolving clients queries

I have two VM's running OpenSUSE 15, one master and one slave. Master is running well and transfer the zones file to the slave correctly but if I stop the bind on master server, slave should respond ...
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2answers
323 views

OPENLDAP Master/Slave replication stopped

I configured my system in this way: Master OpenLDAP 10.100.1.6 and slave OpenLDAP 10.100.1.7 I used this guide: https://www.itzgeek.com/how-tos/linux/configure-openldap-master-slave-replication.html ...
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2answers
322 views

Keepalived two master have virtual IP simultaneously

It's really strange on my BACKUP device always turn to MASTER several secs. I've already search both master have virtual IP simultaneously cases,and all of there solution I've tried, but still not ...
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1answer
52 views

trying to close two ports with firewalld, leaving everything else open

I think I'm using the wrong technique, but not sure of the right one. Machine: Red Hat release 7.2 firewalld.noarch: 0.3.9-14.el7 I've been asked to close two ports but insure that all other ...
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1answer
1k views

Jenkins slave unable to clone from Gitlab

I have an autoscaling Jenkins cluster on AWS, which spawns & runs agents via JNLP. Both Master & Slaves run on Ubuntu. I don't quite understand where Jenkins actually stores the SSH keys for ...
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1answer
2k views

Promoting MYSQL Slave to MYSQL Master

I have a MySQL setup with one master (M1) and one slave(S1). Due to some unforeseen issue I need to promote my slave server to master and demote master to slave. My MySQL version is 5.6 in Linux. ...
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3answers
7k views

Jenkins build happening on master instead of slave

I have been working on an android OS build automation through Jenkins and the repository is massive and the build itself takes a fair amount of time. Therefore, I need to to run on my slave that has ...
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1answer
4k views

Jenkins windows slave unable to connect

Trying to start Jenkins slave on Windows with Java Web start gives me this: >java -jar agent.jar -jnlpUrl https://jenkins.example.com/computer/slave-office/slave-agent.jnlp -secret ...
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1answer
431 views

Keepalived loadbalancing with Nginx not working with only backup Nginx alive after Master Nginx dies

I am using 2 Nginx servers on 2 different machines with Keepalived installed respectively on both machines. Below is the configuration for both Keepalived. MASTER KEEPALIVED vrrp_instance VI_1 { ...
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1answer
365 views

Mysql Master-Slave replication database duplication issue

I have done master-slave replication for performing web-server mirroring. Web contents are getting replicated properly. But I am facing issue in database replication. Database is replicated and slave ...
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1answer
2k views

MariaDb Master-master replication

I tried master-slave replication of mutliple databases of mariadb-5.5.52-1 in RHEL environment, the mariadb came as a part of nagiosxi application. while replicating from master to slave i had many ...
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3answers
3k views

MySQL Master-Master with offsets getting ERROR 1872

I'm trying to fix the replication between a master-master MySQL database replication model. Server 1 (with the IP of 192.168.2.6) is configured with: auto-increment-increment = 2 auto-...
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1answer
231 views

Master/Master and Master/slave replication issues on raspberry pi 3

So for 2 weeks, I've been trying to set a Master/Master replication ( with apache2 web server and mariadb database ) on two Raspberry pi using different methods I've found all over the web ( french ...
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1answer
502 views

Zone transfer from KNOT (master) to BIND (slave) fails with NAUTH

There is a KNOT DNS master name server that I do not manage myself for my domain. I try to setup a BIND DNS server as a slave in-house. BIND fails to do the zone transfer and reports 31-Dec-2017 16:...
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1answer
376 views

Centos 7 , Master-slave replication iptables?

This is the iptables on my mysql_slave server: # sample configuration for iptables service # you can edit this manually or use system-config-firewall # please do not ask us to add additional ports/...
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1answer
346 views

overwrite values with mysql master-slave replication

I have a production database with master-slave replication being done on it. Production DB backups are done off of the slave server. I'd like to make it so that an arbitrary number of development ...
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1answer
598 views

Domain Slave Zone Definition

I've been using Linode for about a year, and am still confused by 'Master' Domain Zone and 'Slave' Domain Zone terminology on their DNS Manager. The term 'Zone' in conjunction with 'Master' AND 'Slave'...
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1answer
109 views

Master-Slave semi circle replication not working in MySQL

I didn't know how to describe it so I am calling it semi circle. Here's what I am doing. Server A Server B = This is slave of Server A Server C = This is slave of Server B When I update something ...
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1answer
2k views

Multi source replication not working in MySQL

I am trying to setup multi source replication. In my slave I have defined following two properties in its configuration file. master-info-repository=table relay-log-info-repository=table These ...
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1answer
134 views

Making master server slave of another master

I have 4 MySQL servers Master1, Master2, Master3 and Master4. Both Master1 and Master2 are masters of each other while Master3 and Master4 are masters of each other. I want to make Master3 slave of ...
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2answers
1k views

Why Redis slaves don't take over the master after master fail in Redis Cluster?

I have a Redis Cluster with 2 masters and 4 slaves (2 slaves for each master). After I manually crash a master (i.e. redis-cli -p 6379 debug segfault) slaves doesn't do anything. They detects that ...
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2answers
147 views

Bind DNS named.config serial- Should it autoincrement? Alternatives to ammending it each time

I'm configuring a DNS service for the first time which involves a master DNS server and a slave DNS server. On investigating why the slave zones were not updating after I make edits to the zones on ...
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2answers
1k views

Slave DNS server (bind) zone files transffered but data is unreadable

I've set up a slave DNS server on Linux using bind. On starting the named service the zone files transffered to slaves/ but the information in the files looks like its in strange computer symbols (i'm ...
2
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1answer
471 views

Port out of range in ReplicatedDB ActiveMQ

I have 3 replicated machines with Zookeeper and ActiveMQ (linux). I can confirm that zookeeper works correctly since I can see their ports (2888 and 3888) listening via netstat. The problem is ...
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1answer
46 views

creating a consumer by cloning the provider in openldap, anything wrong with that?

I have setup an ldap server on centos 7 as a provider and created a consumer by simply cloning the provider and adding syncrepl.ldif to it and seems to work just fine. In all the documentations and ...
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1answer
390 views

Can not select multiple LDAP servers with authconfig bug report

There is this bug report "Can not select multiple LDAP servers with authconfig" Red Hat Bugzilla – Bug 1142830; https://bugzilla.redhat.com/show_bug.cgi?id=1142830 which is suppose to be solved on ...
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1answer
53 views

how a client switches from provider to consmure openldap centos 7

I have setup a basic provider/consumer and client openldap on centos 7. Data does get replicated to the consumer when I add something to the provider and it is all synced up. The client can read info ...
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1answer
1k views

openldap replication on centos 7 not replicated

I have setup a simple openldap server on centos 7 minimum. Added a couple of users and setup a client that can retrieve the users using getentpasswd and ldapsearch works fine between the two. Then I ...
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1answer
393 views

Master and slave bind DNS servers with different version

I am having issues with my master-slave setup, so I'm trying to release what is an causing troubles. Master is running on CentOS Linux release 7.1.1503 (Core) and using BIND 9.9.4-RedHat-9.9.4-29....
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1answer
3k views

Mysql master-slave replication very slow

We're running a MySQL master-slave replication set-up and the slave is very slow at catching up. There seems to be no high network or cpu usage while the slave is going through the masters' logs. ...
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3answers
1k views

Web Server failover solution [closed]

Sorry for a dumb question but I`m a green hand yet. I have two Linux server: one of it is running Apache with MySQL to serve my web-platform (master server) another one is supposed to be a sort of ...
2
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2answers
727 views

The right way to set up master and slave nameservers

I'm wondering about the proper way to set up a master and slave DNS. I read somewhere that your master DNS server should not have an NS record in your zone file - that's sort of secret and then your ...
1
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2answers
10k views

MySQL master-slave replication not updating

This is my first time setting up master-slave replication. I am using this as a guide. I followed the steps and all works till the last part when i need to verify the replication. When i create a new ...
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1answer
380 views

XtraBackup restore gives duplicates on slaving?

We've recently upgraded a MySQL 5.0 master-master setup to Percona 5.6. Slaving went b0rken due to some failures on our side, but we thought we could simply fix it by using xtrabackup to create a ...
1
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1answer
2k views

BIND9: Send Notifications on Specific IP Address

I've been trying to implement a bind master->slave setup between two machines, but I've a problem regarding the IP address BIND used on the master to notify my slave machine. Here is my setup: ...
1
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1answer
222 views

Best method to ensure Mysql master slave replication is consistent?

I am running a master slave replication system on AWS EC2 systems over ssh. However I came across a couple of best practice articles indicating that even this might allow inconsistencies to creep into ...
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1answer
936 views

CRUD with MySQL Master-Slave Architecture

I have setup mysql master-slave replication with 1 master and 3 slaves. Now that I have finished setting up the architecture I am curious as to the best way to make my reads. I realize all writes, ...
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2answers
10k views

ERROR 1130 (HY000): Host 'host' is not allowed to connect to this MySQL server, only on slave

So I have a master and a slave in a mysql cluster, the syntonization works as it should however I am not able to connect to the slave from any host except from the server it self. I have no problems ...
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1answer
260 views

Restart periodically two linux server with master slave dependency

My system is configured as follows: database server on a linux server web application on another linux server For sanitation purposes I would like to restart these servers during night at least once ...
2
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1answer
113 views

Performance-wise, is a DNS Slave better to have than two duplicate Masters?

I have two bind9 servers that are not setup with duplicate settings and know nothing about each other. Our CPU usage is sitting around 7% - 10%: mostly bind, which I believe is perfectly in range for ...
1
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1answer
132 views

How to configure an additional BIND instance for a domain already described by other public name servers?

Background I have a small virtual server hosted by my provider and there I have configured a relatively simple combination of postfix, dovecot and roundcubemail (backed by nginx) that works OK. I ...
0
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1answer
38 views

Configuring different read and write targets for OpenLDAP

I have a new piece of infrastructure (a simple LDAP web service) that will be a drop-in replacement for something that currently exists in production. The backend OpenLDAP server will not be upgraded ...
3
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1answer
812 views

Howto do VCSA redundancy?

We are currently in the process of setting up a new VMWare environment which is now only in lab phase. We are studying the possibility to have a vCenter cluster with an active and a standby/mirrored/...
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1answer
8k views

Pacemaker DRBD resource not getting promoted to master on any node

First off, I'm no linux specialist, I've been following tutorials and been working with the help of google, this worked out fine until now, but currently I'm stuck with a problem. I'm using CentOS 6.5 ...
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3answers
2k views

MySQL - Does the change in MySQL master db password affect on slave db?

I want to change the MySQL DB password on the master db. My question is: do we have to care for the slave DB when changing the master database password?
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0answers
8k views

Nameserver: Slave can't transfer zones from master [closed]

My slave can't transfer the zones from the master. My configuration: Master server: Ubuntu 12.04 with Plesk 11.5. Plesk uses Bind 9 as nameserver. Slave server: Ubuntu 12.04, Bind 9. To tell the ...