RE: Need to understand logs
Hi PiBa, Thank you for clarifying my doubt, this is what I am expecting. My doubt is cleared. Thanks to all of you for spending time for me. Thanks & Regards Rajesh Kolli -Original Message- From: PiBa-NL [mailto:piba.nl@gmail.com] Sent: Monday, September 11, 2017 5:06 PM To: Rajesh Kolli; 'Aleksandar Lazic' Cc: haproxy@formilux.org Subject: Re: Need to understand logs Hi Rajesh, Aleksander, Op 11-9-2017 om 10:32 schreef Rajesh Kolli: > Hi Aleksandar, > > Thank you for clarifying about "Layer 4" checks. > > I am interested in knowing the values of these %d/%d, %s in line 319. > Why it is taking only 1/2, 1/3... values? What they are representing? Have you seen rise & fall in the documentation? http://cbonte.github.io/haproxy-dconv/1.8/snapshot/configuration.html#rise http://cbonte.github.io/haproxy-dconv/1.8/snapshot/configuration.html#5.2-fall Basically it takes by default 3 consecutive failed checks to mark a server down, and 2 passed checks to get it back up. So 1/3 is 1 failed check but server status is still 'up'. Then 2/3 failed check, but still marked up. At 3/3 the server would be marked down, and removed from the backend pool. Then after a while when the webserver is working again the following will happen. After the first successful 1/2 check the server is still marked 'down'. And on the second 2/2 successful check it will be marked 'up' and is added back into the backend server pool to take requests. > 319 "chunk_appendf(, ", status: %d/%d %s", > 320 (check->health >= check->rise) ? > check->health - check->rise + 1 : check->health, > 321 (check->health >= check->rise) ? > check->fall : check->rise, > 322 (check->health >= check->rise) ? > (s->uweight ? "UP" : "DRAIN") : "DOWN"); > 323 > > Thanks & Regards > Rajesh Kolli > > -Original Message- > From: Aleksandar Lazic [mailto:al-hapr...@none.at] > Sent: Sunday, September 10, 2017 9:37 PM > To: Rajesh Kolli; haproxy@formilux.org > Subject: Re: Need to understand logs > > Hi Rajesh. > > Rajesh Kolli wrote on 08.09.2017: > >> Hi Aleksandar, >> Thank you for your response. Yes, I am using "Log-health-checks" in >> my configuration and here is my HAProxy version information. > Thanks. > > sorry to say that but for know you can only take a look into the > source for documenation. > > http://git.haproxy.org/?p=haproxy-1.7.git=search=HEAD=grep=PR > _O2_LO > GHCHKS > > for example. > > http://git.haproxy.org/?p=haproxy-1.7.git;a=blob;f=src/checks.c;hb=640 > d526f8 > cdad00f7f5043b51f6a34f3f6ebb49f#l307 > > We are open for patches also for documentation to add this part to the > docs > ;-) > > To answer your question below I think layer 4 checks are 'only' tcp > checks which sometimes are answered by some os when a service is > listen on the specific port. > > This does not means that the App works properly. > > I'm open for any correction when my assumption is wrong. > > Regards > Aleks > >> [root@DS-11-82-R7-CLST-Node1 ~]# haproxy -vv HA-Proxy version 1.7.8 >> 2017/07/07 Copyright 2000-2017 Willy Tarreau <wi...@haproxy.org> >> Build options : >>TARGET = linux2628 >>CPU = generic >>CC = gcc >>CFLAGS = -O2 -g -fno-strict-aliasing >> -Wdeclaration-after-statement > -fwrapv >>OPTIONS = >> Default settings : >>maxconn = 2000, bufsize = 16384, maxrewrite = 1024, maxpollevents >> = >> 200 > >> Thanks & Regards >> Rajesh Kolli >> -Original Message- >> From: Aleksandar Lazic [mailto:al-hapr...@none.at] >> Sent: Thursday, September 07, 2017 10:08 PM >> To: Rajesh Kolli; haproxy@formilux.org >> Subject: Re: Need to understand logs >> Hi Rajesh. >> Rajesh Kolli wrote on 07.09.2017: >>> Hello, >>> >>> I am using HAProxy community version from a month, i need to >>> understand logs of HAProxy for the i need your help. >>> >>> Here is a sample of my logs: >>> Sep 6 17:03:31 localhost haproxy[19389]: Health check for server >>> Netrovert-sites/DS-11-81-R7-CLST-Node2 succeeded, reason: Layer4 >>> check passed, check duration: 0ms, status: 1/2 DOWN. >>> Sep 6 17:03:33 localhost haproxy[19389]: Health check for server >>> Netrovert-sites/DS-11-81-R7-CLST-Node2 succeeded, reason: Layer4 >>> check passed, check duration: 0ms, status: 3/3 UP. >>> Sep 6 17:03:33 localhost haproxy[19389]: Server >>> Ne
Re: Need to understand logs
Hi Rajesh, Aleksander, Op 11-9-2017 om 10:32 schreef Rajesh Kolli: Hi Aleksandar, Thank you for clarifying about "Layer 4" checks. I am interested in knowing the values of these %d/%d, %s in line 319. Why it is taking only 1/2, 1/3... values? What they are representing? Have you seen rise & fall in the documentation? http://cbonte.github.io/haproxy-dconv/1.8/snapshot/configuration.html#rise http://cbonte.github.io/haproxy-dconv/1.8/snapshot/configuration.html#5.2-fall Basically it takes by default 3 consecutive failed checks to mark a server down, and 2 passed checks to get it back up. So 1/3 is 1 failed check but server status is still 'up'. Then 2/3 failed check, but still marked up. At 3/3 the server would be marked down, and removed from the backend pool. Then after a while when the webserver is working again the following will happen. After the first successful 1/2 check the server is still marked 'down'. And on the second 2/2 successful check it will be marked 'up' and is added back into the backend server pool to take requests. 319 "chunk_appendf(, ", status: %d/%d %s", 320 (check->health >= check->rise) ? check->health - check->rise + 1 : check->health, 321 (check->health >= check->rise) ? check->fall : check->rise, 322 (check->health >= check->rise) ? (s->uweight ? "UP" : "DRAIN") : "DOWN"); 323 Thanks & Regards Rajesh Kolli -Original Message- From: Aleksandar Lazic [mailto:al-hapr...@none.at] Sent: Sunday, September 10, 2017 9:37 PM To: Rajesh Kolli; haproxy@formilux.org Subject: Re: Need to understand logs Hi Rajesh. Rajesh Kolli wrote on 08.09.2017: Hi Aleksandar, Thank you for your response. Yes, I am using "Log-health-checks" in my configuration and here is my HAProxy version information. Thanks. sorry to say that but for know you can only take a look into the source for documenation. http://git.haproxy.org/?p=haproxy-1.7.git=search=HEAD=grep=PR_O2_LO GHCHKS for example. http://git.haproxy.org/?p=haproxy-1.7.git;a=blob;f=src/checks.c;hb=640d526f8 cdad00f7f5043b51f6a34f3f6ebb49f#l307 We are open for patches also for documentation to add this part to the docs ;-) To answer your question below I think layer 4 checks are 'only' tcp checks which sometimes are answered by some os when a service is listen on the specific port. This does not means that the App works properly. I'm open for any correction when my assumption is wrong. Regards Aleks [root@DS-11-82-R7-CLST-Node1 ~]# haproxy -vv HA-Proxy version 1.7.8 2017/07/07 Copyright 2000-2017 Willy Tarreau <wi...@haproxy.org> Build options : TARGET = linux2628 CPU = generic CC = gcc CFLAGS = -O2 -g -fno-strict-aliasing -Wdeclaration-after-statement -fwrapv OPTIONS = Default settings : maxconn = 2000, bufsize = 16384, maxrewrite = 1024, maxpollevents = 200 Thanks & Regards Rajesh Kolli -Original Message- From: Aleksandar Lazic [mailto:al-hapr...@none.at] Sent: Thursday, September 07, 2017 10:08 PM To: Rajesh Kolli; haproxy@formilux.org Subject: Re: Need to understand logs Hi Rajesh. Rajesh Kolli wrote on 07.09.2017: Hello, I am using HAProxy community version from a month, i need to understand logs of HAProxy for the i need your help. Here is a sample of my logs: Sep 6 17:03:31 localhost haproxy[19389]: Health check for server Netrovert-sites/DS-11-81-R7-CLST-Node2 succeeded, reason: Layer4 check passed, check duration: 0ms, status: 1/2 DOWN. Sep 6 17:03:33 localhost haproxy[19389]: Health check for server Netrovert-sites/DS-11-81-R7-CLST-Node2 succeeded, reason: Layer4 check passed, check duration: 0ms, status: 3/3 UP. Sep 6 17:03:33 localhost haproxy[19389]: Server Netrovert-sites/DS-11-81-R7-CLST-Node2 is UP. 2 active and 0 backup servers online. 0 sessions requeued, 0 total in queue. Here my doubts are, in first line health check is 1/2 DOWN and 2nd line it is 3/3 UP, in both cases Layer4 check passed. How to understand it? what exactly it is checking? what are these 1/2 & 1/3's? Finally, is there any document to understand its logging? There is a logging part in the doc but I haven't seen such entries in the document. http://cbonte.github.io/haproxy-dconv/1.7/configuration.html#8 Maybe you have activated http://cbonte.github.io/haproxy-dconv/1.7/configuration.html#4.2-optio n%20log-health-checks in your config. It would be nice to know which haproxy version you use. haproxy -vv -- Best Regards Aleks https://www.me2digital.com/ -- Best Regards Aleks Regards, PiBa-NL
RE: Need to understand logs
Hi Aleksandar, Thank you for clarifying about "Layer 4" checks. I am interested in knowing the values of these %d/%d, %s in line 319. Why it is taking only 1/2, 1/3... values? What they are representing? 319"chunk_appendf(, ", status: %d/%d %s", 320 (check->health >= check->rise) ? check->health - check->rise + 1 : check->health, 321 (check->health >= check->rise) ? check->fall : check->rise, 322 (check->health >= check->rise) ? (s->uweight ? "UP" : "DRAIN") : "DOWN"); 323 Thanks & Regards Rajesh Kolli -Original Message- From: Aleksandar Lazic [mailto:al-hapr...@none.at] Sent: Sunday, September 10, 2017 9:37 PM To: Rajesh Kolli; haproxy@formilux.org Subject: Re: Need to understand logs Hi Rajesh. Rajesh Kolli wrote on 08.09.2017: > Hi Aleksandar, > Thank you for your response. Yes, I am using "Log-health-checks" in my > configuration and here is my HAProxy version information. Thanks. sorry to say that but for know you can only take a look into the source for documenation. http://git.haproxy.org/?p=haproxy-1.7.git=search=HEAD=grep=PR_O2_LO GHCHKS for example. http://git.haproxy.org/?p=haproxy-1.7.git;a=blob;f=src/checks.c;hb=640d526f8 cdad00f7f5043b51f6a34f3f6ebb49f#l307 We are open for patches also for documentation to add this part to the docs ;-) To answer your question below I think layer 4 checks are 'only' tcp checks which sometimes are answered by some os when a service is listen on the specific port. This does not means that the App works properly. I'm open for any correction when my assumption is wrong. Regards Aleks > [root@DS-11-82-R7-CLST-Node1 ~]# haproxy -vv HA-Proxy version 1.7.8 > 2017/07/07 Copyright 2000-2017 Willy Tarreau <wi...@haproxy.org> > Build options : > TARGET = linux2628 > CPU = generic > CC = gcc > CFLAGS = -O2 -g -fno-strict-aliasing -Wdeclaration-after-statement -fwrapv > OPTIONS = > Default settings : > maxconn = 2000, bufsize = 16384, maxrewrite = 1024, maxpollevents = > 200 > Thanks & Regards > Rajesh Kolli > -Original Message- > From: Aleksandar Lazic [mailto:al-hapr...@none.at] > Sent: Thursday, September 07, 2017 10:08 PM > To: Rajesh Kolli; haproxy@formilux.org > Subject: Re: Need to understand logs > Hi Rajesh. > Rajesh Kolli wrote on 07.09.2017: >> Hello, >> >> I am using HAProxy community version from a month, i need to >> understand logs of HAProxy for the i need your help. >> >> Here is a sample of my logs: >> Sep 6 17:03:31 localhost haproxy[19389]: Health check for server >> Netrovert-sites/DS-11-81-R7-CLST-Node2 succeeded, reason: Layer4 >> check passed, check duration: 0ms, status: 1/2 DOWN. >> Sep 6 17:03:33 localhost haproxy[19389]: Health check for server >> Netrovert-sites/DS-11-81-R7-CLST-Node2 succeeded, reason: Layer4 >> check passed, check duration: 0ms, status: 3/3 UP. >> Sep 6 17:03:33 localhost haproxy[19389]: Server >> Netrovert-sites/DS-11-81-R7-CLST-Node2 is UP. 2 active and 0 backup >> servers online. 0 sessions requeued, 0 total in queue. >> >> Here my doubts are, in first line health check is 1/2 DOWN and 2nd >> line it is 3/3 UP, in both cases Layer4 check passed. How to >> understand it? what exactly it is checking? what are these 1/2 & 1/3's? >> >> Finally, is there any document to understand its logging? > There is a logging part in the doc but I haven't seen such entries in the document. > http://cbonte.github.io/haproxy-dconv/1.7/configuration.html#8 > Maybe you have activated > http://cbonte.github.io/haproxy-dconv/1.7/configuration.html#4.2-optio > n%20log-health-checks > in your config. > It would be nice to know which haproxy version you use. > haproxy -vv > -- > Best Regards > Aleks > https://www.me2digital.com/ -- Best Regards Aleks
Re: Need to understand logs
Hi Rajesh. Rajesh Kolli wrote on 08.09.2017: > Hi Aleksandar, > Thank you for your response. Yes, I am using "Log-health-checks" in > my configuration and here is my HAProxy version information. Thanks. sorry to say that but for know you can only take a look into the source for documenation. http://git.haproxy.org/?p=haproxy-1.7.git=search=HEAD=grep=PR_O2_LOGHCHKS for example. http://git.haproxy.org/?p=haproxy-1.7.git;a=blob;f=src/checks.c;hb=640d526f8cdad00f7f5043b51f6a34f3f6ebb49f#l307 We are open for patches also for documentation to add this part to the docs ;-) To answer your question below I think layer 4 checks are 'only' tcp checks which sometimes are answered by some os when a service is listen on the specific port. This does not means that the App works properly. I'm open for any correction when my assumption is wrong. Regards Aleks > [root@DS-11-82-R7-CLST-Node1 ~]# haproxy -vv > HA-Proxy version 1.7.8 2017/07/07 > Copyright 2000-2017 Willy Tarreau <wi...@haproxy.org> > Build options : > TARGET = linux2628 > CPU = generic > CC = gcc > CFLAGS = -O2 -g -fno-strict-aliasing -Wdeclaration-after-statement -fwrapv > OPTIONS = > Default settings : > maxconn = 2000, bufsize = 16384, maxrewrite = 1024, maxpollevents = 200 > Thanks & Regards > Rajesh Kolli > -Original Message- > From: Aleksandar Lazic [mailto:al-hapr...@none.at] > Sent: Thursday, September 07, 2017 10:08 PM > To: Rajesh Kolli; haproxy@formilux.org > Subject: Re: Need to understand logs > Hi Rajesh. > Rajesh Kolli wrote on 07.09.2017: >> Hello, >> >> I am using HAProxy community version from a month, i need to >> understand logs of HAProxy for the i need your help. >> >> Here is a sample of my logs: >> Sep 6 17:03:31 localhost haproxy[19389]: Health check for server >> Netrovert-sites/DS-11-81-R7-CLST-Node2 succeeded, reason: Layer4 check >> passed, check duration: 0ms, status: 1/2 DOWN. >> Sep 6 17:03:33 localhost haproxy[19389]: Health check for server >> Netrovert-sites/DS-11-81-R7-CLST-Node2 succeeded, reason: Layer4 check >> passed, check duration: 0ms, status: 3/3 UP. >> Sep 6 17:03:33 localhost haproxy[19389]: Server >> Netrovert-sites/DS-11-81-R7-CLST-Node2 is UP. 2 active and 0 backup >> servers online. 0 sessions requeued, 0 total in queue. >> >> Here my doubts are, in first line health check is 1/2 DOWN and 2nd >> line it is 3/3 UP, in both cases Layer4 check passed. How to >> understand it? what exactly it is checking? what are these 1/2 & 1/3's? >> >> Finally, is there any document to understand its logging? > There is a logging part in the doc but I haven't seen such entries in the > document. > http://cbonte.github.io/haproxy-dconv/1.7/configuration.html#8 > Maybe you have activated > http://cbonte.github.io/haproxy-dconv/1.7/configuration.html#4.2-option%20log-health-checks > in your config. > It would be nice to know which haproxy version you use. > haproxy -vv > -- > Best Regards > Aleks > https://www.me2digital.com/ -- Best Regards Aleks
RE: Need to understand logs
Hi Aleksandar, Thank you for your response. Yes, I am using "Log-health-checks" in my configuration and here is my HAProxy version information. [root@DS-11-82-R7-CLST-Node1 ~]# haproxy -vv HA-Proxy version 1.7.8 2017/07/07 Copyright 2000-2017 Willy Tarreau <wi...@haproxy.org> Build options : TARGET = linux2628 CPU = generic CC = gcc CFLAGS = -O2 -g -fno-strict-aliasing -Wdeclaration-after-statement -fwrapv OPTIONS = Default settings : maxconn = 2000, bufsize = 16384, maxrewrite = 1024, maxpollevents = 200 Thanks & Regards Rajesh Kolli -Original Message- From: Aleksandar Lazic [mailto:al-hapr...@none.at] Sent: Thursday, September 07, 2017 10:08 PM To: Rajesh Kolli; haproxy@formilux.org Subject: Re: Need to understand logs Hi Rajesh. Rajesh Kolli wrote on 07.09.2017: > Hello, > > I am using HAProxy community version from a month, i need to > understand logs of HAProxy for the i need your help. > > Here is a sample of my logs: > Sep 6 17:03:31 localhost haproxy[19389]: Health check for server > Netrovert-sites/DS-11-81-R7-CLST-Node2 succeeded, reason: Layer4 check > passed, check duration: 0ms, status: 1/2 DOWN. > Sep 6 17:03:33 localhost haproxy[19389]: Health check for server > Netrovert-sites/DS-11-81-R7-CLST-Node2 succeeded, reason: Layer4 check > passed, check duration: 0ms, status: 3/3 UP. > Sep 6 17:03:33 localhost haproxy[19389]: Server > Netrovert-sites/DS-11-81-R7-CLST-Node2 is UP. 2 active and 0 backup > servers online. 0 sessions requeued, 0 total in queue. > > Here my doubts are, in first line health check is 1/2 DOWN and 2nd > line it is 3/3 UP, in both cases Layer4 check passed. How to > understand it? what exactly it is checking? what are these 1/2 & 1/3's? > > Finally, is there any document to understand its logging? There is a logging part in the doc but I haven't seen such entries in the document. http://cbonte.github.io/haproxy-dconv/1.7/configuration.html#8 Maybe you have activated http://cbonte.github.io/haproxy-dconv/1.7/configuration.html#4.2-option%20log-health-checks in your config. It would be nice to know which haproxy version you use. haproxy -vv -- Best Regards Aleks https://www.me2digital.com/
Re: Need to understand logs
Hi Rajesh. Rajesh Kolli wrote on 07.09.2017: > Hello, > > I am using HAProxy community version from a month, i need to > understand logs of HAProxy for the i need your help. > > Here is a sample of my logs: > Sep 6 17:03:31 localhost haproxy[19389]: Health check for server > Netrovert-sites/DS-11-81-R7-CLST-Node2 succeeded, reason: Layer4 check > passed, check duration: 0ms, status: 1/2 DOWN. > Sep 6 17:03:33 localhost haproxy[19389]: Health check for server > Netrovert-sites/DS-11-81-R7-CLST-Node2 succeeded, reason: Layer4 check > passed, check duration: 0ms, status: 3/3 UP. > Sep 6 17:03:33 localhost haproxy[19389]: Server > Netrovert-sites/DS-11-81-R7-CLST-Node2 is UP. 2 active and 0 backup > servers online. 0 sessions requeued, 0 total in queue. > > Here my doubts are, in first line health check is 1/2 DOWN and 2nd > line it is 3/3 UP, in both cases Layer4 check passed. How to > understand it? what exactly it is checking? what are these 1/2 & 1/3's? > > Finally, is there any document to understand its logging? There is a logging part in the doc but I haven't seen such entries in the document. http://cbonte.github.io/haproxy-dconv/1.7/configuration.html#8 Maybe you have activated http://cbonte.github.io/haproxy-dconv/1.7/configuration.html#4.2-option%20log-health-checks in your config. It would be nice to know which haproxy version you use. haproxy -vv -- Best Regards Aleks https://www.me2digital.com/
Need to understand logs
Hello, I am using HAProxy community version from a month, i need to understand logs of HAProxy for the i need your help. Here is a sample of my logs: Sep 6 17:03:31 localhost haproxy[19389]: Health check for server Netrovert-sites/DS-11-81-R7-CLST-Node2 succeeded, reason: Layer4 check passed, check duration: 0ms, status: 1/2 DOWN. Sep 6 17:03:33 localhost haproxy[19389]: Health check for server Netrovert-sites/DS-11-81-R7-CLST-Node2 succeeded, reason: Layer4 check passed, check duration: 0ms, status: 3/3 UP. Sep 6 17:03:33 localhost haproxy[19389]: Server Netrovert-sites/DS-11-81-R7-CLST-Node2 is UP. 2 active and 0 backup servers online. 0 sessions requeued, 0 total in queue. Here my doubts are, in first line health check is 1/2 DOWN and 2nd line it is 3/3 UP, in both cases Layer4 check passed. How to understand it? what exactly it is checking? what are these 1/2 & 1/3's? Finally, is there any document to understand its logging? -- *Thanks & RegardsRajesh Kolli*
