Tag Info

Hot answers tagged

12

The world is full of applications that were never designed with clustering in mind and terrible things happen when you try to run multiple instances of the application concurrently. But the application might be critical enough that having a standby server is a viable solution to meet your availability requirements. Clustering software will typically ensure ...


4

An SSL certificate depends on the IP address of host too, right (besides the hostname)? No, only the Hostname ("DNS-Name") is relevant for a X.509 certificate and the Application Layer. Such a certificate has a field called Common Name (CN) which holds the domain name (which also apprears in the address bar of your browser). The browser validates the ...


2

I believe that F5 and AWS have partnered to offer a product. The F5 VE will allow you to use ratio load balancing. This load balancer software may be purchased on a yearly subscription or hourly basis as needed.


2

NLB operates at the Ethernet layer, which is below the whole TCP/IP stack and thus below any firewall. And, anyway, NLB hosts must be connected to the same network segment: there can't possibly be any block between them.


2

I have another way to achieve this, If you have have several things to upgrade on each server. That'll be very wasting to update 5 server for the same operations. Create a Load Balancing & Scaling Group.Ensure the connection draining is enabled. There's my upgrade step. Remove 1 instance from your load balancer. Update everything you need. And ...


2

I realize the original poster is no longer in need of a solution, but here's my take on the best solution for this issue. I also realize the poster would prefer to use Ubuntu, but configuring the routing rules manually like that isn't great for transferring ownership to others or even referencing yourself years later. I personally would suggest a more ...


2

I'm sorry about the complexity! I'm not an expert on Compute Engine firewalls, but I expect that you're correct about the limitations of the source tags to only work for internal traffic. The Kubernetes team is aware that coordinating multiple clusters is difficult, and we're beginning to work on solutions, but unfortunately we don't have anything ...


2

You should really look at Microsoft DFS to do what you're talking about. It provides a way to abstract the physical location of data by bringing everything together in one place. So, for example you would have: 2 cluster nodes (FSCL1, FSCL2) 2 clustered file services (FS1, FS2), running on the above nodes 2 domain-based DFS namespaces (HOMES, SHARES), ...


1

The message not responding (recovering) indicates that the server is not responding because it is recovering from a failover (or initial start). And is probably still populating the lease databases with all of the free leases from your pool, which could take a while if you have a large pool. Try with a smaller pool to verify your failover is working ...


1

The answer to the specific question about to set up the existing network architecture to support load balancing between the two existing firewalls is to set up a load balancing router behind the firewalls and in front of your LAN, or two routers in HA if you need failover from hardware failure. This is achievable with a Cisco router that support IP SLAs. ...


1

Well, you don't say what version of HAProxy you're using, but assuming it's 1.5.x, you could use the urlp fetch method something like so: acl IsMale urlp(gender) 0 acl IsFemale urlp(gender) 1 use_backend T1 if IsMale use_backend T2 if IsFemale There's more details on the urlp fetch here.


1

No, there is no way to directly do what you propose. Think about your proposal for a minute - when using an ASG, the whole idea is that your instances are ephemeral. Any of them should be able to be killed at any time without negatively affecting your application. In your proposal, how would the ASG "know" which instance is the most up-to-date at any one ...


1

You cannot replicate mailboxes between an on-premise database and Office 365, so even if you had an appropriate load-balancer, you won't have the actual data you want in both places. Professional advice - ensure that you can do the foundational elements of your planned design before investigating the things that depend on those elements. You cannot assume a ...


1

LVS (which uses ipvsadm as a cli) and HAProxy both sit at the same functional load balancing layer. You would generally use one or the other, but not both. HAProxy has the web stats ui which looks like this: You can also access the stats via a csv file. A github repo has a ganglia gmetric script you can use to graph the data. The LVS documentation ...


1

It seems rather difficult to find the needle in the haystack here, but I believe this is a configuration error somewhere. Following this should give you a working baseline configuration: create A-RRs in the DNS zone for <domain> for <farmname.domain> pointing to each of your session hosts in the farm set up trusted certificates for each ...


1

Thanks for all suggestions, but noe of them matched. I have no idea why the observed and decribed pattern of malfunction (and temporal development of malfunction) occured, but the culprit is hidden in what I described as Tons of windows updates It's KB3002567. An update that soon after its release became known as "breaking RDP" - or in fact ...


1

NLB heartbeats operate at Layer 2, so no firewall ports need to be opened. Here's a screenshot of an NLB heartbeat, captured with Microsoft Network Monitor:



Only top voted, non community-wiki answers of a minimum length are eligible