Questions tagged [replication]

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Can SLES 12 replication run in maintenance mode?

I currently have two SLES12 nodes in a cluster. Will there be any anomalies if I enabled replication while the nodes are in maintenance mode?
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0answers
13 views

OpenLDAP cluster: deletion of an entry is not replicated

We have an OpenLDAP 2.4 cluster of three nodes configured in multi-master and accessed through a VIP in round-robin. The three machines run RHEL7. We noticed that deletion of an entry (done from a ...
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0answers
12 views

Currently I have two node cluster (SLES as HANA DB). I would like to check in which condition a failover will be triggered?

Below are the conditions. We could not test these because these nodes are already in production. Replication between the nodes fail. Replication is working but network link is down with no bonding. ...
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1answer
21 views

How to verify which is primary node in a HANA DB cluster operating on SLES 12?

Currently I have two HANA DB servers in a cluster and replication is not running. Upon checking from SUSE Hawk, node 2 is acting as primary node and node 1 is available. How do I confirm that node 2 ...
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18 views

Setting up Pacemaker (pcs) with DRBD

I am working on a high-availability NFS passive-active cluster with two nodes. I am on RHEL 7.6. Both nodes have DRBD setup on them with two partitions, /prod (/dev/drbd0) and /base (/dev/drbd1). The ...
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9 views

MySQL Replication from older master to newer slave - Unknown system variable 'binlog_checksum', 'SERVER_UUID'

So, here is the master: [04:18] [master ~] # mysql -V mysql Ver 14.14 Distrib 5.5.62, for Linux (x86_64) using readline 5.1 And slaves: [08:37] [slave1 ~] # mysql -V mysql Ver 14.14 Distrib 5.7....
2
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1answer
179 views

Cannot replicate DNS zone data from master on LAN to slave behind firewall in a DMZ

Here is some information about my setup. I have a master DNS server in my LAN subnet running on a Ubuntu 16.04 box. In addition, I have some slave DNS servers on my various other subnets (DMZ subnet, ...
1
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1answer
34 views

Failover physical and virtual machine with replication. Is it possible?

I want to create HA cluster with 2 nodes. First node is physical machine, second is virtual (under ProxMox). Both running under Ubuntu. I know how to make HA with corosync and pacemaker. How i can ...
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0answers
159 views

GlusterFS peer rejected and no data replication following reboot

I'm experimenting with glusterfs on ubuntu16.04. Setup consists of: Gluster-server node1: ubuntu16-2 Gluster-server node2: ubuntu16-3 Gluster-client: ubuntu16-1 I've setup a gluster volume named '...
2
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2answers
523 views

Unidirectional syncing/replicate large file incrementally

I have a binary file on a Linux server that is being actively appended by a process (written in C with a constantly open file handler and flushing non-ASCII buffer to this file). I would like to ...
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0answers
711 views

FreeNAS: Snapshots on replicated datasets disappear

I am running 2 FreeNAS boxes (let's call them A and B). A is the production server which contains multiple datasets on mirrored/striped ZFS volumes for sharing via cifs, nfs, etc. A is configured to ...
4
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1answer
4k views

ZFS on Linux send/receive resume on poor/bad ssh connection

I am using ZFS on Linux, and trying to setup remote replication. But I have bad ssh connection, and zfs send/receive over ssh restarts again. I know there is a issue on ZoL, but I don't know when it ...
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1answer
38 views

Cloning 20 machines a week: how to clone to variable size destination drives (small to large) [closed]

I work with a non-profit that installs an Ubuntu variant on machines every week, thousands per year. However, the destination hard drive size varies depending on what's donated. The current install ...
2
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1answer
3k views

GlusterFS replicated volume - mounting issue

I'm running GlusterFS using 2 servers (ST0 & ST1) and 1 client (STC), and the volname is rep-volume. I surfed the net, and read all articles explaining how to fix mounting issues but ...
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1answer
531 views

Branch File Server Caching- Linux

We want to centralize our Linux file server in the cloud (AWS). We don't want a full copy of each file to be downloaded every time there is a change to that file. I am somewhat familiar with Windows ...
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0answers
170 views

BTRFS send only new files without deleting anything on remote

I'm looking into replacing rsync with BTRFS tools, but I'm not sure if what I want to do is even possible. I have a small local volume and a large remote volume used for archiving. Files will be ...
2
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1answer
457 views

Automating Master/Master replication setup and configuration on two servers

I'm in the middle of writing a script to automate configuring MySQL replication between two servers (Master/Master replication), and was looking for some advice on a few things related to MySQL. The ...
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4answers
25k views

how to one-way mirror an entire zfs pool to another zfs pool

I have one zfs pool containing several zvols and datasets of which some are also nested. All datasets and zvols are periodically snapshotted by zfs-auto-snapshot. All datasets and zvols also have some ...
1
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1answer
292 views

Replicating growing log files in a near real-time manner over the network

I have a server with a bunch of processes writing log files as they run. I need to enable a client host to get a replica of the server-side log files in a near real-time manner. Is there a better way ...
3
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1answer
1k views

Btrfs/ZFS Network Replication

Is it possible to replicate a ZFS or Btrfs raid volume in real-time (or as close to as possible, network specs aside) over a network? ZFF and Btrfs are ideal because of their CoW properties. I'm ...
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1answer
742 views

Couldn't connect to the primary server: postgresql HA installation

Trying to install Postgresql-9.4 High Availability (HA) in RHEL7, using three nodes. In all three nodes, installed postgresql, updated postgresql.conf and pg_hba.conf files accordingly. After ...
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0answers
143 views

OpenLDAP - ACL control - Full access to user

I need to create a ACL that give to user a full write to rootdn. I tried that: access to * by dn="cn=replicator,o=rootdomain" write But I get the some message. error 50 "Insufficient ...
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1answer
2k views

OpenLDAP's cn=config is not getting fully replicated

I've got OpenLDAP 2.4.39 master and a read-only replica, using the cn=config aka "OLC" configuration (as oppose to the older slapd.conf method). Replication works for data (user accounts, etc) but ...
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0answers
407 views

GPO with SAMBA as DC

I am working on a network of 500 Windows workstations with Linux servers. SAMBA 4 is in use as the domain controller. Users can move between workstations, and as a results the contents of their ...
1
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1answer
4k views

DRBD Failure: (127) Device minor not allocated

I use wmware workstation to run two virtual machines with OpenVZ 2.6.32-042stab108.2 installed on top on CentOS 6.6. I have created another primary partition, /dev/sda4, to configure it as drbd ...
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1answer
387 views

Can set up a cron job to copy my server to Amazon S3

I have an Ubuntu 12.04 install on physical hardware. I will then install Geonode on it. The system will be running at a place with variable network capacity. My colleagues will add data and should ...
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0answers
498 views

Trying to setup a 2 way file sync in Linux

I am trying to setup a 2 way file sync in linux of reasonably small data-set. I would like to replicate data over WAN so distributed filesystems like gluster are not in point of my interest - they are ...
1
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1answer
196 views

Rebooting Centos Servers configured with MYSQL Master/Slave Replication

Sometime ago we configured MYSQL replication on our main web server to another CentOS 6 server. All is working perfectly and we can see the replication is working fine. My question is how to safely ...
2
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1answer
1k views

Option --skip-slave-start Not Working with Systemctl

I just started with centos 7. I'm trying to get replication working and am attempting to start mysql without starting the slave (so that I can set the pointers as to where it's supposed to resume ...
1
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2answers
153 views

fs synchronization among desktops

I have several workstations (laptops and desktops). I'd like to synchronize files among them such that each one is a mirror of the other. I used to run an NFS server and share files out, but that ...
1
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1answer
108 views

zfs replication temporary file

I'm running a zfs replication task, of a snapshot size ~2.5GB. I see that there is traffic going between the master and the slave, by using snoop, but I want to monitor the transmission. Is there a ...
1
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1answer
342 views

GlusterFS use Geo-replication or normal gluster?

We have 4 offices with ipsec lan2lan over fibre net (20-100 mbit on eache office, except one office with 10 mbit fibre). Latency is below 20 ms (between to of the offices with fastest network we have ...
2
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1answer
4k views

Segmentation fault (core dumped) when try to run iptables rhel6

I'm currently trying to set up a MySQL replication and I don't have a /etc/sysconfig/iptables. So I tried to install it with yum install. It showed the following output. Installed Packages Name ...
4
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1answer
1k views

Periodic filesystem replication wih snapshot

I'm looking for a non-realtime replication solution that supports periodic snapshot. Here's my current situation: I have 2 email servers running Ubuntu 12.04 LTS The mail server program I use is ...
2
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2answers
183 views

Copy website from RedHat to CentOS

We currently have our website and website's CMS hosted on a dedicated host which runs Red Hat. We want to remove Red Hat and install CentOS instead. My question: is there a straight forward way of ...
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2answers
772 views

Installation of RHEL and softwares on multiple machines

In our organization, we have 15 new systems each with same hardware. I need to setup all the machines with RHEL 6.0 in it, multiple software, and lot of basic configuration. I don't have any ...
2
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1answer
2k views

mysql replication not working

I have two servers A and B I tried to setup replication between two servers for fixed dbs DBA and DBB but it's not working my configurations Tables are not getting updated why?? Master:(/etc/my.cnf) ...