Http-plugin supports metric base load balancing? like Mod_OC4J!

Similar Questions

• Best way to HTTP in OSB load balancing

  Hello world
  
  We have a cluster of OSB and we must load balance HTTP requests on managed servers. Looking for info on OSB in load balancing, I found that there are essentially two options: use a hardware load balancer or a software solution like Weblogic HttpClusterServlet. For the moment, we have without balancer material available so we will have to take the option of software. I found a few articles on the configuration of HttpClusterServlet as http://redstack.wordpress.com/2010/12/20/using-weblogic-as-a-load-balancer.
  But I have a question for this configuration. If we use a managed server as a proxy HTTP requests between OSB as managed servers, what would happen if the server goes down? I think that one of the main objectives of a cluster deployment is to avoid a single point of failure, but with this configuration, all requests depend on the availability of the managed proxy server.
  
  Could you recommend a configuration of implementation of OSB load balancing?
  
  Thank you in advance,
  
  Daniel.

  Load Balancing in a cluster for http requests can be made using at least 4 different ways:

  (1) - use a hardware load balancer like F5 BigIP LTM
  (2) - use a web server with the plugin from weblogic to the cluster frontend
  (3) - use weblogic with HTTPClusterServlet
  (4) - use the DNS round robin - it works if you managed servers that run on 2 machines (say mach1, mach2) but on the same port. Client HTTP use hostname "mach" to access the URL and the dns has a resolution of names alternating Mach mach 1 and mach2 IP addresses...

  All options except (1) only achieve load balancing and not automatically failover all instances... Balancing load material has the additional feature to probe [sending periodic pings to targets], by which it can detect if the target resource is alive and do not send traffic to other nodes who are alive... That's why the hardware load balancers are worth their investment...
  other options may work if the client is encoded to a retry on failure... so on 2nd or subsequent attempt, the routing is done in the machine that is alive...

  For the options (1), (2)) and (3), you also need a redundancy of the system (material of load balancer, web server or weblogic) to avoid the single point of failure for load balancing... Balancers support material are usually deployed in redundant pairs to achieve...

  Published by: atheek1 on 11/22/2011 15:31

• The console to load balancing proxy

  Hi people,

  I have set up 2 servers of vCloud Director for redundancy:

  Server 1:

  http address: vcd1.example.com

  Console proxy address: vcdcon1.example.com

  Server 2:

  http address: vcd2.example.com

  Console proxy address vcdcon2.example.com

  I've set up a public URL through a load balancer: vcd.example.com. It works perfectly - I can connect to the public URL on the load balancers and functions of vCD correctly.

  It is:

  https://vcd.example.com load balanced back end vCD servers vcd1.example.com and vcd2.example.com.

  Now I try to get the proxy to the console through the load balancers and have not been able to get this working.

  First, I checked the remote console works when connecting to the address consoleproxy on the servers of vCD, for example vcdcon1.example.com and vcdcon2.example.com. The console connects very well and I can connect to the virtual machine.

  I set up one address public consoleproxy on the load balancers, for example https://vcdcon.example.com that load balances at vcdcon1.example.com and vcdcon2.example.com.

  When the remote to a computer virtual console is launched, I get the following error:

  Unable to connect to the MKS: Timeout during an attempt to read.

  I tried this on a Juniper DX load balancer and a device of Zeus Traffic Manager and get the same results. On Zeus, I can see the last HTTP request sent from my PC before the above error is visible:

  CONNECT 10.10.10.100:902 HTTP/1.1

  10.10.10.100 is the public proxy IP console, i.e. vcdcon.example.com.

  I use self-signed certificates free for the public and back end https.

  Someone at - it work for vCD consoleproxy addresses of load balancing?

  TIA - Trevor

  Hi Trevor,

  try changing the load balancing policy, try using a simple tcp strategy, without cookies management

  Max

• manual load balancing or tnsnames load balancing

  Hussein,
  
  We have 2 nodes apps (apps1 and apps2 both on a separate machine) connection to a database of cars 2 nodes (db1 and db2 both on a separate machine).
  We want to apply the load balancing across 2 application servers. I "heard" can be actually using the tnsnames.ora load balancer? Or I'm just out of this world. :)
  
  Thank you very much
  
  Ms. K

  Salvation;

  Please check below and see its helpful:

  11i RAC JDBC & listener Load Balancing Configuration [244366.1 ID]
  Implementation of load balancing across Oracle eBusiness Suite - Documentation specific Load Balancer Hardware [ID 727171.1]
  In 11i [ID 148516.1] load balancing
  How http://ID to ensure the load balancing of concurrent process CFP - RAC Configuration Manager 762024.1
  Configuration of 11i for balancing [ID 117421.1]
  JSP error after implementing [ID 269208.1] JDBC load balancing
  How to configure the load balancer for Workflow 2.6.3 [ID 311803.1]

  Respect of
  HELIOS

• HTTP authentication support - is STILL Basic Plugin

  I am trying to make a connection IS with a host in the inventory of the VCO plugin. The connection request returns an authorization token in the response header that is then defined as a header in all subsequent REST calls in VCO. I am able to make the connection and authorization token in the response header in the browser based REST clients. However if I do the same connect REST in VCO call apparently remove the response header as response.getHesders () for the connect call will return null.

  It seems that the authorization in the HTTP-REST plugin is handled differently, I would like to know how to make a connection with the plugin HTTP and REST. The REST API that I'm trying to interface with has a connection like this operation.

  DOWNLOAD/login

  Request

  GET https://192.168.1.10:4534 / connection

  Headers

  Content-Type: application/xml

  Permission: Base64EncodedString base composed of 'name '.
  

  Response

  Headers

  X SDS-AUTH-TOKEN: < AUTH_TOKEN >

  Body

  HTTP/1.1 200 OK

  Content-Type: application/xml

  <? XML version = "1.0" encoding = "UTF-8" standalone = "yes"? >

  < loggedIn >

  < user > user name < / user >

  < / loggedIn >

  How can I access this authentication token in VCO? Is - this accassable through the REST-host?

  I also tried to set up the host in the HTTP-REST plugin with basic authentication and a session mode of "by the Session of the user", but I'm not sure how to pass the user name and password to the host when using this type of session.

  Thank you

  slahy

  I found an example to access the headers in the link below, and it seems that you must place the answer in a variable to access the content of the response. Seems a little odd to me, but it works.

  var SessionResponse = new Properties ();

  SessionResponse.put ("statusCode", CreateSession.statusCode);

  SessionResponse.put ("headers", CreateSession.getAllHeaders ());

  If (SessionResponse.statusCode == "200") {}

  System.log ("created successful logon")

  xZertoSessionKey = SessionResponse.headers.get ("x-zerto-session")

  }

  else {}

  System.log ("Session could not be established")

  }

  http://www.vcoportal.de/2014/06/automate-your-zerto-disaster-recovery-solution-with-VCO/

• Network of twinning with Port trunks to support the host ESX VShere 4 with several NIC for load balancing across a HP ProCurve 2810 - 24 G

  We are trying to increase production of our ESX host.

  ESX4 with 6 NIC connected to HP Procurve 2810 - 24G 2 ports; 4; 6; 8; 10 and 12.

  The

  grouping of parameters on ESX is rather easy to activate, however, we do not know

  How to configure the HP switch to support above connections.

  Pourrait

  someone please help with a few examples on how to seup the HP switch.

  Help will be greatly appreciated as we continue to lose tru RDP sessions

  disconnects.

  Best regards, Hendrik

  Disabling protocols spanning-tree on the Procurve ports connected to the ESX host is going to promote a recovery more rapid port. Similarly, running global spanning tree is not recommended if you mix some VLAN iSCSI and data in the same fabric (i.. e. you do not want a STP process to hang storage IO). Spanning tree on your switches, look PVST (or Procurve BPMH) to isolate the STP VLANs unique events.

  In regard to the load balancing is, by default (route based port ID) value algorithm requires less overhead on the ESX hosts.  You may not use LACP on the Provurve the lack of facilities LACP ESX. You must use "route based on the IP hash" sideways ESX and 'static trunks' on the side of Procurve. Unless you have specific reasons why your network need loads this configuration, I'd caution against it for the following reasons:

  (1) IP hash requires thorough inspection of packages by the ESX host, increasing CPU load as load package increases;

  (2) the static configuration puts switch physics rigid and critical ESX host port mapping. Similarly, groups of ports all will fail as the Procurve batteries for management only and won't be on switches 802.3ad circuits Group (i.e. all ports of a group of circuits must be linked to a single switch) - this isn't a limitation of the port ID routing;

  (3) K.I.S.S. love port ID mix of port ID, beacon probe and failover on the port assignments you will get segregation of the raw traffic without sacrificing redundancy - even through switches.

  I hope this helps!

  -Collin C. MacMillan

  SOLORI - Oriented Solution, LLC

  http://blog.Solori.NET

  If you find this information useful, please give points to "correct" or "useful".

• vShield Edge 5.1.2 load balancing HTTPS health check possible?

  Hello

  We expect configure edge gateway Load Balancing Service using vCloud Director 5.1.2 and vCloud network and security 5.1.2

  Is it possible to configure health checking with HTTPS and configure the URI to use for the control?

  Best regards

  jmarschall

  Hello

  You have 3 options to check on the edge of health:

  1 TCP: checking the simple TCP connection

  2 HTTP: sends HTTP GET using either the default value {/}, which is accessible by default on almost any server, but may be changed to any other URI.

  3 HTTPS: sends hello SSLv3 client messages and check the server Hello coming from the virtual machine. No URI is included.

  If you CAN do health checks for HTTPS, but NOT for any custom URI. Instead, it checks for valid SSL beyond the normal TCP communications.

• Hyperic HA does support load balancing?

  Hello
  
  We try to implement architecture Hyperic high availability based on JBoss HA and distributed cache EHCache. Our version is 3.2.3 EE.
  The cluster configuration is quite simple with the HQ High Availability Guide.
  Thanks for this guide and the esayness of the configuration of the feature!
  
  My first question was, the agent, what server IP should I use? I put with node 1 and other agents with node 2
  = > the synchronization between nodes works very well.
  
  Therefore, I have some additional questions.
  
  1 / can I have a single point of entry for agents with some load balancing and failover capability?
  For example, if an agent is sending information with the Node1 and this node breaks down or the server is restarted for maintenance purposes, the agent information will be lost.
  
  2 / same question for the application, can I have a single point of entry URL with some load balancing and failover capability?
  
  Thanks for your help.
  
  Nicolas.
  
  Post edited by: njmn

  HQ Enterprise HA for failover, but do not support for load balancing.  You will need before your HQ multiple servers with a load (software/hardware) balancer which will relay agent to a live server.  The load balancer must be staged all agents in a single node of 'master '.  If this server is unavailable, another server will automatically become the master node and agents should be redirected to this node.

  Charles

• Hi ALL, did any attempt on the virtual computer NETWORK load balancing using HYPERV on UCS blades

  I try to configure the CASE server cluster by using the Unicast NLB on the virtual machine on different blades on the UCS, it works for awhile, then he abandoned packages.

  I heard that this screenplay of unicast is not supported in the UCS when she used END-host mode in the fabric interconnet...? any attempted before.

  Would it, I use the multicast mode is that something needs to be done on the FBI62020 or the LAN switch upstream. ??

  Header note I found on the implementation of UCS for mulitcast NLBL:

  Microsoft NLB can be deployed in 3 modes:

  Unicast

  Multicast

  IGMP multicast

  For series B UCS deployments, we have seen that the multicast and IGMP multicast work.

  IGMP multicast mode seems to be the more reliable deployment mode.

  To do this, the monitoring settings:

  All NLB Microsoft value "Multicast IGMP" nodes.  Important!  Check ths by logging into EACH node independently.  Do not rely on the MMC of NLB snap.

  An IGMP applicant must be present on the VLAN of NLB.  If PIM is enabled on the VIRTUAL LAN that is your interrogator.  UCS cannot function as applicant IGMP.  If an interrogator of functioning is not present, NLB IGMP mode will not work.

  You must have a static ARP entry on cheating it upstream pointing IP address Unicast NLB on the multicast MAC address NETWORK load balancing.  This need will set up, of course, on the VLAN of the NLB VIP. The key is that the routing for the NLB VLAN interface must use this ARP entry as a unicast IP ARP response may not contain a multicast mac address. (Violation of the RFC 1812)  Hosts on the NLB VLAN must also use the static entry.  You may have several entries ARP.  IOS can use a function of 'alias' of ARP. (Google it.)

  How Microsoft NLB works. -The truncated for brevity Mac addresses.

  TOPOLOGY OF NLB MS

  NETWORK VLAN 10 = subnet 10.1.1.0/24 IP load balancing

  VIP = 10.1.1.10 NETWORK LOAD BALANCING

  Arp entry static switch advanced IP 10.1.1.10 upstream to MAC 01

  NLB VIP (MAC 01, IP 10.1.1.10)

  NODE-A (AA, MAC IP:10.1.1.88)

  NŒUD-B (MAC BB, IP:10.1.1.99)

  Using the IGMP snooping and interrogator VLAN snooping table is filled with the mac NLB address and groups pointing to the appropriate L2 ports.

  MS NLB nodes will send the responses of IGMP queries.

  This snooping table could take 30 to 60 seconds to complete.

  Host on VLAN 200 (10.200.1.35) sends traffic to NETWORK VIP (10.1.1.10) load balancing

  It goes of course to VLAN 10 interface that uses the static ARP entry to resolve to address MAC 01 VIP NETWORK load balancing.

  Since it is a multicast frame destination it will be forward by the IGMP snooping table.

  The framework will arrive at ALL NLB nodes. (NŒUD-A & NŒUD-B)

  NLB nodes will use its load balancing algorithm to determine which node will manage the TCP session.

  Only one NLB node will respond to this host with TCP ACK to start the session.

  NOTES

  This works in a VMware with N1k, standard vSwtich and vDS environment. Where surveillance IGMP is not enabled, the framing for VIP MAC NETWORK load balancing will be flooded.

  NLB can only work with TCP-based services.

  As stated previously mapping an IP unicast to a multicast mac address is a violation implied by RFC 1812.

  TROUBLESHOOTING

  Make sure your interrogator is working. Just to clarify that this does not mean that it is actually at work.

  Wireshark lets check that IGMP queries are received by the NLB nodes.

  Make sure that the ARP response works as expected.  Once Wireshark again is your friend.

  Look at the paintings IGMP snooping. Validate the L2 ports appearing as expected.

  CSCtx27555 [Bug-preview for CSCtx27555] Unknown multicast with destination outside the range MAC 01:xx: are deleted. (6200 FI fixed in 2.0.2m)

  IGMP mode not affected.

  CSCtx27555    Unknown multicast with destination outside the range MAC 01:xx: are deleted.

  http://Tools.Cisco.com/support/BugToolKit/search/getBugDetails.do?method=fetchBugDetails&bugId=CSCtx27555

  fixed in 2.0(2m)

  Solution: Change the NLB mode of operation of "Multicast" to "multicast IGMP', which modifies balancing load NETWORK VIP MAC at 0100.5exx.xxx Beach, allows to transfer occur as expected.

  Q: and if I switch to switch mode, which means all of the profile and the settings on the servers are completely exhausted and I need to recreate them. ???

  A:Cisco Unified Computing System Ethernet switching Modes

  http://www.Cisco.com/en/us/solutions/collateral/ns340/ns517/ns224/ns944/whitepaper_c11-701962.html

  -There is no impact on the configuration, you have done service profiles.  they will continue to work as expected.  Mode selector has the FI behave more like a conventional switch.  Most notable is that Spanning tree will be activated and if you have several uplinks yew, tree covering weight will begin to block redundant paths.

  You need to review your topology and what impact tree covering weight.  Generally, we at the switch port upstream defined as "edge master", you want to delete this line.

  For pre-production and laboratory environment, PDI can help qualified with the planning, design and implementation partners.  Given to review the IDP site and open a case if you need more detailed assistance.

• PIX / ASA - OSPF load balancing

  Hello

  I read the balance a route via OSPF equal cost load the PIX. It will send packages via per package, or is there another method for distibuting the traffic to the break following equal cost?

  Thank you!!

  Lee

  Hello Lawrence,.

  PIX 6.3 now supports the NLB using OSPF only (up to 3 default routes)

  The PIX can receive up to 3 doors by default (all the same metric) 3 different routes of entry, and

  balance the load on a per destination basis. Currently, there is no way the PIX to

  determine which carries a package will be sent to. You cannot currently use static routes

  for load balancing.

  The used hash algorithm is not simple, it is very difficult to determine which

  Route (next hop) a package will be given an IP Source and Destination pair. Basically,.

  the PIX takes the source and destination IPs (two 32-bit numbers) and axe in one

  16-bit unique number. Then the number of 16-bit (0x0000 - 0xFFFF) is divided into thirds.

  The first 1/3 goes to the door of entry 1, the next 1/3 goes to the door of entry 2, and the last 1/3 goes to

  Gateway 3.

  I hope this helps! If Yes, please rate.

  Thank you

• Performance / load balancing

  Hello

  I am currently trying to load balance my guests / VM. I have 4 DELL R610 with 48GB of RAM. I then 20 VM. I have the license "Advanced" without DRS.

  What would be the best way to ensure that I use my hosts to their full potential? and second, what is a good rule of how many resources you use on a host? 70% + 70% RAM CPU?

  Thanks for all your help constant. I really appreciate it.

  -allthebest1976

  I don't think that there is really no "rules" as to what your environment should be to in terms of memory and CPU usage.  It varies a lot depending on each environment and workloads that you are running.  Instead of getting hung up on a set of numbers for the CPU and memory, I would do just that your environment is designed for the following:

  (1) can high availability - withstand the loss of one (or more) host without overloading the remaining hosts?  You really need determine what that your SLA is in terms of guests how much you can afford to lose, and if you need all the virtual machines to run in the event of a loss of the host.  Ensuring that you have enough available resources to support the loss of a host is a very important point and can easily get overlooked because it is so easy to continue to deploy new virtual machines.  Striving to get the CPU and memory, using the order of 60-70% may limit your ability to lose hosts without serious performance degradation.

  (2) growth - you have the ability to increase your environment with the needs of your business change?  You can add new virtual machines if there is a merger of the company, a new application in the House, or if you need to increase their testing, etc.?  Growth is often overlooked but planning so that it advances can save money down the road.

  (3) performance - how guests are performing in your environment, and how do you make them?  As you start to add more virtual machines and use resources increases, you can start to experience performance problems in the guests.  Same question as above - it is so easy to deploy new virtual machines that you can quickly get to the point where you have too many virtual machines per host and no easy way to balance the load with vMotion.  If you still meet the needs of application performance, and the two points above have been satisfied according to the requirements of your organization, then you're doing something good!

  I know that looking for probably a response that resembles something more like "all hosts should be 50% CPU and 60% usage of memory" but it is not really an easy way to give that answer.  I'm trying to make sure the 3 criteria above are met and worry less what the real numbers are like.

  Matt

  My blog: http://www.thelowercasew.com

• NETWORK load balancing issues

  Hi all

  It is a strange and I can't really find anything when searching. I just wanted to know if other people have seen this? and if there is a work around?

  OK, the virtual environment that I administer is quiet large and the love windows NLB developers where I prefer f5 or hardware NLB. So it is quiet assign windows NETWORK load balancing clusters in the virtual environment, the issue I encountered is if the critical path for an application passes a cluster nlb to another (so they talk to each other). If a node of each of these clusters is on the same physical host NLB rocking.

  Why?

  well windows NLB when a request is sent to the VIP address all nodes in the cluster must meet before it is executed by one of the nodes, tests that I've found is that if a node of each group is on the same host demand seams to stay internal to the ESX host, as it goes, I know where that IP address is and goes to a single node until that node is waiting for the other nodes of the cluster in order to recognize the request but they never get it the whole thing stopped and happens to expire and the performed by the team of network packet capture won't let even the host he sews.

  OK, a few rules affinity could solve this but I'm talking about 8 knots, talking to a node 4 cluster which then in turn talk to another cluster of 4 knots and im talking about another 50 like that until the point where DRS. can not move whatever it is as well that the rules are a nightmare administrave especially since only 2 machines can be in a rule.

  All hosts running ESX 4 Update 1 and running on HP blades, unfortunately we run on unicast mode, due to the size of the environment networks don't want to or can't add all switches/routers arp entries. It is configured as recommended by using unicast.

  I can reproduce this problem every time still in test. would it be because of the unicast? I don't see how.

  I would add also that it should not be 2 nlb cluster, if a server client attempts to hit the VIP of a windows NETWORK load balancing cluster and it is on the same host as one of the nodes it will expire as a single node gets applications. F5 NLB works perfectly, and when they are on hosts separate windows THAT NLB works very well also.

  Just came across this because the jobs would come about the application does not, by trying to hit the vip on the correct port for the requesting server, it wouldn't connect and the support guys would vmotion a knot and it would usually fix the issue, and if it does not pass all the nodes on the same esx host and it would work every time (I know (, but until the full time vmware resources came on board as me not doubtful we had the time to really watch)

  any ideas or comments would be great hope I have explianed the question clearly enough

  See you soon

  See: http://www.vmware.com/files/pdf/implmenting_ms_network_load_balancing.pdf

  You must use the multicast.

  André

• Control of load balancing tool

  Hello friends,
  I have a (10.3.5) Weblogic Server environment with Oracle Cluster (2 knots) my question is: Y at - it a graphical tool allowing to control the load balancer is running correctly.
  
  
  Thank you much for the supportive friends.

  You can use the follow up dashboard (http://host_admin_server:7001/console/dashboard) for this purpose.

  Here you can create your own point of view, by clicking on allow, and then click the button Add. Then, you can add parameters to your
  view. Select the metric browser tab, select the server you want to monitor. In the region of Types select WorkManager
  and in the forums area, for example, select "by default, em ' (workmanager-name, name of the application). Finally, add a metric
  in your opinion, for example, completedrequests. This procedure can be repeated for multiple servers and when you are finished
  adding parameters, you must start the view: click the view list, select your point of view and click on the Start button.

• What load balancing algorithm using the LRT224?

  I was wondering if anyone knew what algorithm of load balancing the LRT224 use since I can't find it anywhere and the telephone support line does not.  It is very similar to the RV320 of Cisco that uses Weighted Round Robin, but I don't think that the Linksys uses this algorithm because it includes speeds of bandwidth unlike the cisco that does not work.  and if anyone can also check that this unit doesn't package base rather than load balanced session load balancing.  as much information as possible would be appreciated!

  The standard of the LRT load balancing is alternated:

  Example:

  1 TCP connection to website-online WAN1

  2 TCP connection to website2.com-online WAN2

  3 TCP connection to website2.com-online WAN1

  4 TCP connection to website1.com-online WAN2

  If you enable the feature (recommended) sticky load balancing load balancing is done on a base per session instead of the base of the connection.

  Example:

  1 TCP connection to website-online WAN1

  2 TCP connection to website2.com-online WAN2

  3 TCP connection to website2.com-online WAN2

  4 TCP connection to website1.com-online WAN1

• SRW2008 load balancing

  Hi, what is the best way to balance the two connectrions with SRW2008 internet? Is possible to also "switch"?

  Thank you in advace

  Nino

  Aggregation of links (sometimes called "Bundling") combines two or more physical ports into a single logical port. After that, you have only one logical port. This allows you to increase the bandwidth on a link. To use it, you must connect the ports combined in another switch/device that supports the same and has the same configuration.

  So, Yes to use the aggregation of links, you'll need another switch like the SRW2008.

  However, the aggregation of links isn't load balancing. The logical port is still a single connection, even if it's running on multiple threads. It must connect to the same physical device.