Two more cents from my side: socklog [1] also works pretty well...
[1] http://smarden.org/socklog/ Conrad On 02/18/2016 11:28 AM, Baptiste wrote: > On Thu, Feb 18, 2016 at 10:57 AM, Willy Tarreau <w...@1wt.eu> wrote: >> Hi Aleks, >> >> On Wed, Feb 17, 2016 at 04:30:06PM +0100, Aleksandar Lazic wrote: >>> Hi. >>> >>> how difficult is it to be able to add "log stdout;" to haproxy? >>> >>> I ask because in some PaaS environment is it difficult to setup a >>> dedicated user yust for haproxy. >>> >>> It fits also a little bit better to http://12factor.net/logs >> >> It's been discussed a few times in the past. The response is "no". >> It's totally insane to emit logs to a blocking destination. Your >> whole haproxy process will run at the speed of the logs consumer >> and the log processing will incure its latency to the process. >> >> If one day we implement an synchronous stream logging task, this >> could change, but for now we send immediate logs as datagrams in >> order never to block. >> >> To get an idea about what it can look like with blocking logs, >> simply run "haproxy -d 2>&1 | more" and don't press any key. >> You'll quickly see that the system continues to accept new >> connections and that they will randomly freeze at various steps. >> >> Regards, >> Willy >> >> > > My 2 cents: Some tools may be used for this purpose: > > Configure HAProxy to send logs to port 2000, then use: > > - socat: > socat -u UDP-RECV:2000 - > <133>Feb 18 11:27:02 haproxy[4134]: Proxy f started. > <133>Feb 18 11:27:02 haproxy[4134]: Proxy b started. > <133>Feb 18 11:27:02 haproxy[4134]: Proxy stats started. > <129>Feb 18 11:27:02 haproxy[4134]: Server b/s is DOWN, reason: Layer4 > connection problem, info: "Connection refused", check duration: 0ms. 0 > active and 0 backup servers left. 0 sessions active, 0 requeued, 0 > remaining in queue. > <128>Feb 18 11:27:02 haproxy[4134]: backend b has no server available! > > - netcat: > netcat -l -k -u 2000 > <133>Feb 18 11:28:17 haproxy[4303]: Proxy f started. > <133>Feb 18 11:28:17 haproxy[4303]: Proxy b started. > <133>Feb 18 11:28:17 haproxy[4303]: Proxy stats started. > <129>Feb 18 11:28:17 haproxy[4303]: Server b/s is DOWN, reason: Layer4 > connection problem, info: "Connection refused", check duration: 0ms. 0 > active and 0 backup servers left. 0 sessions active, 0 requeued, 0 > remaining in queue. > <128>Feb 18 11:28:17 haproxy[4303]: backend b has no server available! > > > > Baptiste > -- Conrad Hoffmann Traffic Engineer SoundCloud Ltd. | Rheinsberger Str. 76/77, 10115 Berlin, Germany Managing Director: Alexander Ljung | Incorporated in England & Wales with Company No. 6343600 | Local Branch Office | AG Charlottenburg | HRB 110657B
