Ubuntu Servers :: MySQL - Setup An Active / Active Load Balanced And High Available?

Mar 11, 2011

how to setup an Active/Active Load Balanced and High Available (If one of the nodes is down the system still runs) MySQL cluster. I have found quite a few howto's but I have some things unclear in my mind. I found a few solutions like this one: [URL] or this: [URK] Those are using two or four MySQL nodes, two Load Balancers to avoid a single point of failure but only one MySQL cluster management server. What happens if the MySQL cluster management fails?

I have also found a "MySQL Master-Master Circular Replication" technique but from what I read, with this option there is a chance that conflicts will arise if node A and node B both insert an auto-incrementing key on the same table.

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Ubuntu Servers :: Setup Windows Active Directory System?

Mar 24, 2011

I need to setup windows Active Directory system and want to use our existing ubuntu server as Primary Domain Controller (samba). What I'd like to know is if its possible to setup a machine running standard Ubuntu as the PDC, or if I would need to install Ubuntu server.

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Ubuntu Servers :: Setting Up A Load Balanced Service?

Jun 29, 2011

Im used to Win Server so Im not very familiar with ubuntu server, I want to setup a load balanced service I have three server , one as a load balancer and the other two as my web servers, now my questions is that what are the steps I need to do to setup my cluster, I dont mean the requirements, not the actual detailed configuration.

Im gonna have my Mail server on these servers, how am I gonna setup the mail server to work with the load balancer, I mean is it possible to load balance the mail server like web server on ubuntu?

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Software :: Zone Transfers For Load-balanced BIND Servers?

May 13, 2010

I am planning to implement hardware load-balanced DNS servers. There will be one master and three slaves in the server farm. I will have two virtual servers associated with the server farm that will be listed as external nameservers for our domain.

BIND uses the list of NS records to determine the servers that need zone transfers. The zone NS records will not be the addresses of any of the real servers. How do I tell the master to do zone transfers to the real slave servers?

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Ubuntu :: Install/load Active X On A Firefox Workstation?

Feb 19, 2011

Is there anyway to install/load Active X on a Ubuntu/Firefox workstation?

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Ubuntu :: Only Single Core Active On Quad Core AMD When Acpi Is Active?

Jun 8, 2011

Only Single core active on quad core AMD when acpi is active.with acpi=offuname -aLinux dvip4 2.6.32-30-server #59-Ubuntu SMP Tue Mar 1 22:46:09 UTC 2011 x86_64 GNU/Linux

Code:
cat /proc/cpuinfo
processor : 0

[code]...

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OpenSUSE Install :: Setup Squid With Active Directory Authenticaton ?

May 23, 2011

How to setup squid on opensuse with active directory authenticaton.

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Server :: Setup User Authentication And Internet Accounting Like ISA And Active Directory In Windows?

Mar 8, 2011

setup user authentication server and internet accounting server like ISA and Active Directory in Windows?

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Ubuntu Servers :: Active Ip Address For Server?

May 8, 2010

I installed LAMP server at my debian lenny. people can't view my webpage via my ip address. How to active my ip address?

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Ubuntu Servers :: Enable Active Directory Authentication?

Feb 3, 2010

Just installed Alfresco 3.2 using the Canonical repo in Karmic. Unable to find proper guide to enable Active Directory authentication.

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Ubuntu Servers :: Windows Active Directory Server

Mar 11, 2010

I would like to set up Some kind of windows user manager in an ubuntu sever. The windows network is already set up. I've scoured the net for hours and found nothing.

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Ubuntu Servers :: Samba Active Directory With Windows 7?

Dec 18, 2010

I have ubuntu server 9.04 installed on my computer and I am trying to make a Domain Server. I have made sure that there are no problems in the configuration file. When I go to join the domain in windows 7 it tells me that it cannot find the Active Directory server.

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Ubuntu Servers :: 9.04 Jaunty Hangs While Sftp Is Active And Dynamic IP Changes?

Feb 1, 2010

I have this strange problem which I am unable to web search on and not sure what to do next. My Linux knowledge is between basic to intermediate but I know how to troubleshoot general hardware problems.

My problem is that Ubuntu 9.04 Jaunty 64-bit hangs while SFTP is active and dynamic IP changes. For example, I SFTP into my home server and transfer file then suddenly my ISP decides to renew my IP and give me a new IP while my SFTP client is still uploading files to my home server. This causes my SFTP client to stop working. Upon checking, my router is still running with a new IP lease from my ISP. My Linux box still powers on but typing anything from the keyboard does not make it "wake up" and put things on the monitor. Nothing seems to make it respond and the only way is to get about it is to power off and on. During that time, you cannot SSH into the server as there is no respond. SFTP into the server is not possible too because connection fails.

The server has all new hardware, latest BIOS, etc. Memtest86 shows no errors after running for more then 5 hours. I am unable to find anything out of the norm in /var/log/kern.log or in dmesg. All hardware seems to be working.

When I think about it, I tend to think OpenSSH (probably that is the default package in Jaunty) is causing this system hang whenever there is an interrupted connection from the outside world. However, I fail to agree with this is because I am sure the daemon and Linux can tolerate this situation without resorting to system hang. FYI, I have installed vsftp as well but this should not be a problem.

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Ubuntu Servers :: Samba Shares Using Active Directory Permissions?

Jul 20, 2010

I am the IT Manager at a research facility. We have a fairly unique network configuration in order to support all of the different projects we have going on. We have Red Hat, Ubuntu, Windows XP/Vista/7, Windows Servers 2003, Ubuntu servers, Red Hat servers, and even a few Netgear ReadyNAS and Buffalo Terastations. Over the last few years, I have been migrating all of my users and accounts to a single ACL list, which I chose to be a Windows AD 2003 server. 95% of my users work on Windows platforms and just use ssh tunnels to develop on our linux boxes.

However, i ran in to a problem with our Linux boxes not being able to symbolic link on my Windows 2003 file shares. Of course, this is a problem with Windows not supporting symbolic links. I know 2008 does support this feature, but given the economy and the budget restraints, we cannot afford to purchase the updates we would need, so now I am moving all of my shares to a Ubuntu 10.04 server using Samba. I have joined the server to my AD domain successfully, i can login using my AD credentials, and even assign ownership and group permissions using AD users/groups.

Here is my question.

I would like to keep the AD permission schemes intact. I have several shares that contain folders that have individual permission settings. For example, I have a /shared directory that contains about 50 different folders. Some of these folders I allow my users to write data to, some just read, and others I deny access to complete groups and just allow key groups to access (for example, personnel data should only be accessed by the Administrative staff).

Is there a way to make this work?

I can assign uid and gid manually per folder in Samba, but i would like to have the possibility to add multiple users and groups with permissions to folders, which I do not believe can be done with the standard chown commands. Currently, I can see the folder permissions from my Windows box, but when I try to edit the permission settings, it defaults back to full access. So my AD permissions are not being saved.

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Ubuntu Servers :: OpenVPN Authentication Of Users In Active Directory?

Nov 8, 2010

Since yesterday I'm fighting with OpenVPN on Ubuntu 10.04TLS and I can not cope with the authorization of users from Windows 2008 AD server. It looks like this: Published 93.159.XX.XX IP address the router and all traffic directed to the internal LAN IP 10.0.1.210. Customers who will combine the different platforms are Mac OS, Linux, Windows XP, 7, Vista. The whole domain is for Windows 2008. Uploader authLDAP module, but I still can not connect, that is, not after entering the username and password from the W2K8 domain does not log

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Ubuntu Servers :: Server 10.04 As LDAP Client Of Active Directory?

Nov 19, 2010

(This was posted at the end of another thread, where it probably didn't belong, so reposting here)I have Active Directory set up on one machine (and I can't really adjust the settings very much) and Ubuntu Server 10.04, which I would like to use as a client.I followed the directions at https://help.ubuntu.com/community/LD...Authentication, but when I get to

Code:
getent passwd
I don't see anything from the LDAP, and ssh'ing into the box from an LDAP/AD username certainly doesn't work.

In addition, I've attempted to use Webmin's LDAP Configuration module to configure it. I can connect to the server and can browse it with the LDAP browser with my settings, but the Webmin package doesn't recognize the users (which are organized in one of four Organizational Units (OUs) within the OU that I have as my Search Base) as users,

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Ubuntu Servers :: RAID5 - Re-adding Drive As Active, Not Spare?

Jan 13, 2011

I have a little nice Ubuntu server with 6x 1TB drives assebmbled into a RAID5 array. Recently SATA cable of one of the drives failed. So I ordered a new cable and ran the server in degraded mode for a few days. Like this:

Code:
/dev/md0:
Version : 00.90
Creation Time : Sat Sep 19 10:39:11 2009
Raid Level : raid5
Array Size : 4883812480 (4657.57 GiB 5001.02 GB)
code....

I'd like the 6th drive to be active, not spare, like before. Should I just wait for rebuild to be finished (it can easily take over 1 day)? Or should I add it somehow differently to be active immediately?

I'm not sure, but I think as I simulated failures unplugging one of the disk, after plugging it in again, the "failed" drive was active again and rebuilding was started as well of course. But it was 2 years ago, so...

The array works just fine for now - I can access files, etc. But I suspect, that in this state if another cable or drive fails, it won't survive anymore. Even after rebuilding is finished, but the 6th drive stays is still marked as "spare". Right?

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Ubuntu Servers :: Firestarter And Webmin Bandwidth Monitor Not Logging Anything When FS Is Active

Jan 7, 2010

I'm installing a server to act as a firewall between a local network and internet. I've installed Firestarter becaused it worked straitgh away (it seems that FS is configuring the routing as well). I've tried to remove it, and then I lost the access from LAN to Internet. (I don't know why -perhaps the routing is disabled then- , so I prefer to keep it).

The problem is that Webmin Bandwidth Monitor (bandwidthd) is not logging anything when FS is active. Does someone has an idea on how I could make it work? I've tried cacti and some other stuff, but it is far too complicated for me.

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Ubuntu Servers :: Retrieve Active Directory Users' Primary Group?

Feb 20, 2010

This is the scenario: Active Directory Server = 192.168.0.1 Squid/Dansguardian Proxy Server w/NTLM Auth = 192.168.0.10 The Linux box has been integrated with AD and works fine. Users can authenticate automatically when login the AD or when they access the web through Basic authentication. That part is just fine.

But, when I add a new user, or change a users' primary group, I have to change the 'filtergroups' file in Dansguardian. I tried to make auto this process using the USERMAP and USERMAP2 scripts in [URL].. at the "Extras and Add Ons" section, but both scripts doesn't run properly in Ubuntu if they are not changed. I tried, following the instructions, but got a lot of syntax errors. So, I wrote a very simple script using 'net rpc' to retrieve all users according to the AD Security and Domain Groups. I created an output folder in dansguardian to dump the rpc outputs into files. And read the files to apply filtering groups.

[Code]...

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Ubuntu Servers :: Adding Server To Microsoft Active Directory Domain?

Mar 11, 2010

When i try to join my Ubuntu server to Microsoft Active Directory domain, i get the error message below.

Kinit failed: Clock skew too great Failed to join domain: Time difference at domain controller I know the reason is because of the time difference between my domain controller and the Ubuntu server. But what i want to know is that possible to join a domain without time synchronisation? Because my domain controller is working for another time zone, for another Country, so i can not synchronise it with my Ubuntu server.

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Fedora Servers :: Apache Binding To Active Directory - Use Web Shares?

Feb 9, 2009

Something that has been in the pipleline at work for a while is user-based web directories. Main PDCs are running Windows Server 2003 using Active Directory, ideally what would happen is that users have a web share under [URL].. - the server behind this would be Linux (either Fedora or CentOS).

What kind of configuration would be needed for Apache to make this possible? The way I have planned so far is to have the Linux box auth against the AD domain (possibly joined), with Apache setup to share local public_html folders. Not sure how I can get rid of the tilde from the start of the username, but it should be pretty easy.

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Server :: Authenticate A Group Of Servers Against Windows Active Directory?

Feb 26, 2011

We have a small group of linux servers, currently with local logins. I want to eliminate the local logins and authenticate against the corporate AD. I've been looking at PAM - but winbind requires each machine to be added to the AD. This becomes a pain if we create new virtual or physical servers. Is it possible to have one server authenticate directly with AD, and the other servers authenticate against this server, which defers to the one server that is registered in AD?

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Red Hat :: Geographical Redundancy - Software - In Order To Have The Four Servers Running Active

Mar 24, 2010

I have four Red Hat 5 servers located in two different geographical sites. they are working active/active on each site.

Is there any software that I can use in order to have the four servers running Active/Active Active/Active in the same time, and if one site has been destroyed the other two servers in the other site handle the traffic?

Basically the traffic is a Web traffic.

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Ubuntu Servers :: Samba To Replace Windows File Server In Active Directory?

Jul 22, 2010

We have a couple of Windows file servers that just share files. It is all they do. We'd like to use Ubuntu on two replacement servers allowing Windows XP and Windows 7 clients to access the files. Our network is active directory based due to Exchange and homegrown .NET apps, so it is important that active directory is used to authenticate the clients. Samba doesn't need to be a pdc or bdc, but provide pass through authentication.I understand that Samba can communicate with active directory through security-ads and security-domain.

Here are my questions to see if I should proceed:1) Folder permissions:If we move all our files to the Ubuntu server how do we set folder permissions and will we see the active directory accounts when we do this?2) Skipping ubuntu accounts: I know the domain and ads allow you to skip creating ubuntu accounts, right? If not, how do you keep the passwords synchronized?3) Easiest way? Is there a very easy way to pull this off that I've missed? My goal is to eliminate the Windows based file servers while ensuring the admin part of it is as easy as possible.To date I've been able to get the sharing to work with an ubuntu account mirroring the active directory account. I've been able to get Samba to talk to the pdc, but not successfully through domain security. ADS security was a complete cluster with winbindd

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Ubuntu Servers :: High Load On Webserver After Upgrade To 10.04 From 9.10?

May 10, 2010

I upgraded webserver to new ubuntu server 10.04 (x86-64). After upgrade the increased load from 0,3 to 1,4. On webserver running phpbb, which generating slow quieres, which not before upgrade to lucid. HW conf: Intel Core i7, 8GB ram, WD Raptor 10k rpm. Week17 upgrade to new version.

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Ubuntu Servers :: High Load Average But Idle CPU?

Nov 26, 2010

I am having a problem with the server that I use to host my personal site. The load average quite often spikes to exceed 1.00 for the 1 and 5 minute intervals, and the 15 minute interval gets above .5. This occurs while the server is idle, serving very few or no requests and with the CPU 99% idle with <1% IOWAIT usage. I have checked top and vmstat, but neither one provides any useful info. Top continues to say the CPU is 99% idle, and vmstat says that there are 0 runnable and 0 blocking tasks. Occasionally, vmstat will say that there is 1 runnable task, but this doesn't even coincide with the load average spikes. I have already searched for other solutions to this problem, but everything I have seen says to use top and/or vmstat, but those aren't showing anything out of the ordinary. Can anyone recommend anything else I might do?

My server has a Pentium 4 HT 3gHz processor, 2GB RAM, and runs Kubuntu 10.10. (The reason it runs Kubuntu instead of Ubuntu Server is that it needs an X environment so that the Nvidia driver can initialize and put its graphics card into a power saving mode.)

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Ubuntu Servers :: Get A List Of Both The Local Groups And The Groups In The Active Directory?

Feb 4, 2011

I already know of a work around to fix this problem, but I guess my question is why is this not working as expected? I am using a Windows Server 2008 R2 Active Directory for authentication.

I have run auth-client-config for the ldap profile and pam-auth-update. When running getent passwd, I get a list of both the local users and the users in the active directory (with populated information in the Unix schema extension). When running getent group I get a list of both the local groups and the groups in the active directory (with populated information in the Unix schema extension).

Interestingly enough, though, when I run su DOMAINUSER, after the prompt for the password I get an authentication error. In /var/log/auth.log I can see an entry with pam_ldap: missing "host" in file "/etc/ldap.conf". The SRV records in the DNS servers resolve correctly. I've checked this with nslookup and I have seen the records within my zone file. Obviously if the ldap.conf file is working with getent and the ldap server is resolving from the SRV records, it is working fine.

The interesting part is that the Windows Server 2008 R2 AD machine shows in the event viewer that there was a successful authentication, yet the Ubuntu box says no. When I add the host within the ldap.conf file, everything works...getent and the actual authentication, either initial login or su.

[Code]...

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Server :: Setup Master / Master Mysql In HA Setup Without Use Of Load Balancer Provided By Host?

Mar 31, 2010

I have a load balancer with 2 web servers behind it. The web servers rsync with cloud storage to update their apache directories 1 time every hour. Apache is just running php pages that pull/push data to a DB so they dont need to be updated that often. However I need to figure out how to implement a Master/Master MySQL setup to have my web servers point to for the PHP stuff. I need to implement it without having a single point of failure. The Load balancers are useless for failover as they only detect availability based on Ping request. So putting a master/master setup behind a Load Balancer is out. what is the best way to setup the master/master mysql in a HA setup without the use of a load balancer provided by the host?

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Ubuntu Servers :: Active Directory Domain Integration - Allow Domain Users To Authenticate Server And Access File Shares Using Samba

May 13, 2010

The company I work for, as usual, is Microsoft-centric. I'm attempting to integrate my Ubuntu server into the domain to allow domain users to authenticate to the server and access file shares using Samba. Here's my current configuration:

[Code].....

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Ubuntu Servers :: RAID-5 Recovery (spare/active) / Degraded And Can't Create Raid ,auto Stop Raid [md1]?

Feb 1, 2011

Could any RAID gurus kindly assist me on the following RAID-5 issue?I have an mdadm-created RAID5 array consisting of 4 discs. One of the discs was dropping out, so I decided to replace it. Somehow, this went terribly wrong and I succeeded in marking two of the drives as faulty, and the re-adding them as spare.

Now the array is (logically) no longer able to start:

mdadm: Not enough devices to start the array.Degraded and can't create RAID ,auto stop RAID [md1]

I was able to examine the disks though:

Code:
root@127.0.0.1:/etc# mdadm --examine /dev/sdb2
/dev/sdb2:
Magic : a92b4efc
Version : 00.90.00
code....

Code:
mdadm --create --assume-clean --level=5 --raid-devices=4 /dev/sda2 /dev/sdb2 /dev/sdc2 /dev/sdd2
As I don't want to ruin the maybe small chance I have left to rescue my data, I would like to hear the input of this wise community.

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