Some more information while showing backend not available. Server test_cluster/server1 is DOWN, reason: Layer7 timeout, check duration: 2001ms. 0 active and 0 backup servers left. 3 sessions active, 0 requeued, 0 remaining in queue. backend test_cluster has no server available! Server test_cluster/server1 is DOWN, reason: Layer7 timeout, check duration: 2001ms. 0 active and 0 backup servers left. 1 sessions active, 0 requeued, 0 remaining in queue. backend test_cluster has no server available! Server test_cluster server1 is UP, reason: Layer7 check passed, code: 200, info: "HTTP content check matched", check duration: 1ms. 1 active and 0 backup servers online. 0 sessions requeued, 0 total in queue.
On Wed, Nov 15, 2017 at 5:20 PM, DHAVAL JAISWAL <dhava...@gmail.com> wrote: > I did apply that and its under observation. > > There is one more issue after introducing Internal ELB is overall > performance of site is slightly reduced. The response which I used to get > in less than 100 ms now some time is going beyond 100 ms. > > Any clue how can I improve it. > > On Wed, Nov 15, 2017 at 4:21 AM, Igor Cicimov <igorc@encompasscorporation. > com> wrote: > >> Dhaval, >> >> What I put in my resolvers is the EC2 instance subnet dns server which >> for EC2 is always the second IP of the subnet range, xxx.xxx.xxx..2 >> >> You can also find this IP in your /etc/resolv.conf on the haproxy >> instances. Try replacing >> >> 169.254.169.253:53 with that value and see how you go. >> >> On Wed, Nov 15, 2017 at 4:04 AM, DHAVAL JAISWAL <dhava...@gmail.com> >> wrote: >> >>> Even after reducing "hold valid" to 1s shows the same behavior. >>> >>> One more observation is that after introducing ELB in haproxy config, >>> site seems to have little late response. >>> >>> Provided link is helpful, however if any one face same issue or can >>> share experience to solve it will be really helpful. >>> >>> On Tue, Nov 14, 2017 at 5:00 AM, Igor Cicimov < >>> ig...@encompasscorporation.com> wrote: >>> >>>> >>>> >>>> On Mon, Nov 13, 2017 at 11:28 PM, James Stroehmann < >>>> james.stroehm...@proquest.com> wrote: >>>> >>>>> I had a similar problem, and I believe reducing my ‘hold valid’ >>>>> setting to 1s fixed it. >>>>> >>>>> >>>>> >>>>> >>>>> >>>> >>>> Possible explanation is the "inter" parameter which is by default set >>>> to 2s for the "check" operation, see https://cbonte.github.io/hapro >>>> xy-dconv/1.7/configuration.html#inter for details. >>>> >>>> In other words, read the docs about ALL timeouts set in Haproxy to >>>> figure out how they correlate between each other and how to set the proper >>>> values for your user case. >>>> >>>> >>>> >>>> >>>>> *From:* DHAVAL JAISWAL [mailto:dhava...@gmail.com] >>>>> *Sent:* Monday, November 13, 2017 2:31 AM >>>>> *To:* HAproxy Mailing Lists <haproxy@formilux.org> >>>>> *Subject:* backend has no server available! >>>>> >>>>> >>>>> >>>>> [External Email] >>>>> >>>>> I had the following config where we are using AWS ELB for load >>>>> balancing. However, now we are keep getting backend test_cluster has no >>>>> server available! >>>>> >>>>> >>>>> >>>>> Under this ELB two servers attached. Both instance are in healthy >>>>> state. Healthy state we are checking on port 80 and tomcat response >>>>> sending >>>>> on port 8080 >>>>> >>>>> >>>>> >>>>> internal-testtomcatautoscale-1314784611.ap-southeast-1.elb.a >>>>> mazonaws.com >>>>> >>>>> >>>>> >>>>> >>>>> >>>>> resolvers testresolver >>>>> >>>>> nameserver dns1 <http://169.254.169.253:53> >>>>> <http://169.254.169.253:53> >>>>> 169.254.169.253:53 >>>>> >>>>> resolve_retries 3 >>>>> >>>>> timeout retry 1s >>>>> >>>>> hold valid 10s >>>>> >>>>> >>>>> >>>>> backend test_cluster >>>>> >>>>> mode http >>>>> >>>>> option forwardfor >>>>> >>>>> fullconn 10000 >>>>> >>>>> option httpchk /test-testalive >>>>> >>>>> http-check expect string OK >>>>> >>>>> option http-server-close >>>>> >>>>> option abortonclose >>>>> >>>>> balance roundrobin >>>>> >>>>> server server1 internal-testtomcatautoscale-1 >>>>> 314784611.ap-southeast-1.elb.amazonaws.com:8080 check resolvers >>>>> testresolver >>>>> >>>>> >>>>> >>>>> >>>>> >>>>> What could be the cause of this issue. How can i fix it. >>>>> >>>>> >>>>> >>>> > > > -- > Thanks & Regards > Dhaval Jaiswal > -- Thanks & Regards Dhaval Jaiswal
