May 2016 - mod_cluster-issues - Jboss List Archives

[JBoss JIRA] (MODCLUSTER-487) Default AdvertiseBindAddress value should not be NULL (UDP Multicast on Linux systems with more NICs)

by Michal Karm Babacek (JIRA)

[ https://issues.jboss.org/browse/MODCLUSTER-487?page=com.atlassian.jira.pl... ] Michal Karm Babacek updated MODCLUSTER-487: ------------------------------------------- Fix Version/s: 2.0.0.Alpha1 > Default AdvertiseBindAddress value should not be NULL (UDP Multicast on Linux systems with more NICs) > ----------------------------------------------------------------------------------------------------- > > Key: MODCLUSTER-487 > URL: https://issues.jboss.org/browse/MODCLUSTER-487 > Project: mod_cluster > Issue Type: Bug > Components: Native (httpd modules) > Affects Versions: 1.2.11.Final, 1.3.1.Final > Environment: Linux, multiple NICs environment > Reporter: Michal Karm Babacek > Assignee: Michal Karm Babacek > Priority: Critical > Fix For: 2.0.0.Alpha1 > > Attachments: advertise-linux3_x86_64.zip, advertise-windows_x86.zip, Advertize.class > > > Credit where it's due: the issue was first spotted by [~rhatlapa]. > h3. Problem > It appears that trying to send to all interfaces with {{NULL}} or {{"0.0.0.0"}} -- the default {{bindaddr}} when no {{AdvertiseBindAddress}} is set -- in the following statement actually picks the first non-loopback interface and sends to it. > {code} > if ((rv = apr_sockaddr_info_get(&ma_listen_sa, bindaddr, > ma_mgroup_sa->family, bindport, > APR_UNSPEC, pool)) != APR_SUCCESS) { > ap_log_error(APLOG_MARK, APLOG_ERR, rv, s, > "mod_advertise: ma_group_join apr_sockaddr_info_get(%s:%d) failed", bindaddr, bindport); > {code} > The result is that there is no datagram on other interfaces. Surprisingly, this is not deterministic though: After dozens or hundreds of messages, eventually one datagram reaches another interface. > h3. Impact > Picture this simple scenario: There are two interfaces, e.g. > {noformat} > enp1s0 10.16.88.187 > enp2s0 172.18.0.1 > {noformat} > listed in this exact order with {{ip addr show}}. > One has an EAP 7 (Wildfly 10) instance with mod_cluster bound to {{172.18.0.1}} IP address, which implies {{enp2s0}} interface. > Furthermore, one has an Apache HTTP Server instance with mod_cluster bound to {{172.18.0.1}} IP address, i.e. MCMP VirtualHost and main VirtualHost all Listen on this IP address. > Result: Without advertising, using an explicit {{proxy-list}}, all is well. MCMP works, requests work, balancing works. > On the other hand, relying on advertisement, it could take EAP 7 (Wildfly 10) *minutes* to register with the balancer. > The reason is that a vast majority of UDP Multicast datagrams arrives at enp1s0 and EAP 7 (Wildfly 10) doesn't see them. > h3. Reproducer > Lemme demonstrate with a recently refactored [advertise.c|https://github.com/Karm/mod_cluster/tree/advertise-native-tes...] utility for sending datagrams and the well known [Advertize.java|https://raw.githubusercontent.com/modcluster/mod_cluster/m...] utility for receiving them. > Your your convenience, here are binaries built from the aforementioned sources: > * Advertize java utility: [^Advertize.class] > * advertise native utility (Linux3 x86_64): [^advertise-linux3_x86_64.zip] > * advertise native utility (WIndows x86): [^advertise-windows_x86.zip] > h3. Demonstration on Linux > h4. System > {noformat} > [mbabacek@perf09 ~]$ ip addr show > 1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN > link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00 > inet 127.0.0.1/8 scope host lo > valid_lft forever preferred_lft forever > 2: enp1s0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP qlen 1000 > link/ether 00:18:8b:7a:46:04 brd ff:ff:ff:ff:ff:ff > inet 10.16.88.187/21 brd 10.16.95.255 scope global enp1s0 > valid_lft forever preferred_lft forever > inet 10.16.93.253/21 brd 10.16.95.255 scope global secondary enp1s0 > valid_lft forever preferred_lft forever > 3: enp2s0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP qlen 1000 > link/ether 00:18:8b:7a:46:05 brd ff:ff:ff:ff:ff:ff > inet 172.17.72.254/19 brd 172.17.95.255 scope global enp2s0 > valid_lft forever preferred_lft forever > 4: docker0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state DOWN > link/ether 02:42:07:ab:74:f9 brd ff:ff:ff:ff:ff:ff > inet 172.18.0.1/16 scope global docker0 > valid_lft forever preferred_lft forever > {noformat} > h4. Java > {noformat} > [mbabacek@perf09 ~]$ java -version > openjdk version "1.8.0_71" > OpenJDK Runtime Environment (build 1.8.0_71-b15) > OpenJDK 64-Bit Server VM (build 25.71-b15, mixed mode) > {noformat} > h4.Advertise SENT > {noformat} > [mbabacek@perf09 ~]$ date;./advertise -a 224.0.1.102 -p 33364 > Mon Mar 21 12:39:51 EDT 2016 > UDP Multicast address to send datagrams to. Value: 224.0.1.102 > UDP Multicast port. Value: 33364 > IP address of the NIC to bound to. Value: NULL > apr_socket_bind on 0.0.0.0:0 > apr_mcast_join on 0.0.0.0:0 > apr_socket_sendto to 224.0.1.102:33364 > {noformat} > h4. Advertize RECEIVED > YES (/) > {noformat} > [mbabacek@perf09 ~]$ java Advertize 224.0.1.102 33364 > Linux like OS > ready waiting... > received: Advertize !!! Mon, 21 Mar 2016 16:39:51 GMT > received from /10.16.88.187:38907 > {noformat} > YES (/) > {noformat} > [mbabacek@perf09 ~]$ java Advertize 224.0.1.102 33364 10.16.88.187 > Linux like OS > ready waiting... > received: Advertize !!! Mon, 21 Mar 2016 16:39:51 GMT > received from /10.16.88.187:38907 > {noformat} > NO (x) > {noformat} > [mbabacek@perf09 ~]$ java Advertize 224.0.1.102 33364 172.17.72.254 > Linux like OS > ready waiting... > {noformat} > YES (/) > {noformat} > [mbabacek@perf09 ~]$ java Advertize 224.0.1.102 33364 0.0.0.0 > Linux like OS > ready waiting... > received: Advertize !!! Mon, 21 Mar 2016 16:39:51 GMT > received from /10.16.88.187:38907 > {noformat} > And now let's take a look at {{172.17.72.254}}, i.e. {{enp2s0}} > h4. Advertise SENT > {noformat} > [mbabacek@perf09 ~]$ date;./advertise -a 224.0.1.102 -p 33364 -n 172.17.72.254 > Mon Mar 21 12:42:57 EDT 2016 > UDP Multicast address to send datagrams to. Value: 224.0.1.102 > UDP Multicast port. Value: 33364 > IP address of the NIC to bound to. Value: 172.17.72.254 > apr_socket_bind on 172.17.72.254:0 > apr_mcast_join on 172.17.72.254:0 > apr_socket_sendto to 224.0.1.102:33364 > {noformat} > h4. Advertize RECEIVED > NO (x) > {noformat} > [mbabacek@perf09 ~]$ java Advertize 224.0.1.102 33364 > Linux like OS > ready waiting... > {noformat} > NO (x) > {noformat} > [mbabacek@perf09 ~]$ java Advertize 224.0.1.102 33364 10.16.88.187 > Linux like OS > ready waiting... > {noformat} > YES (/) > {noformat} > [mbabacek@perf09 ~]$ java Advertize 224.0.1.102 33364 172.17.72.254 > Linux like OS > ready waiting... > received: Advertize !!! Mon, 21 Mar 2016 16:42:57 GMT > received from /172.17.72.254:35452 > {noformat} > NO (x) > {noformat} > [mbabacek@perf09 ~]$ java Advertize 224.0.1.102 33364 0.0.0.0 > Linux like OS > ready waiting... > {noformat} > h3. Demonstration on Windows > One could note that the problem doesn't exist on Windows. All interfaces receive advertising. > h4. Advertise SENT > {noformat} > C:\Users\karm\advertise-build > λ advertise.exe -a 224.0.1.102 -p 33364 > UDP Multicast address to send datagrams to. Value: 224.0.1.102 > UDP Multicast port. Value: 33364 > IP address of the NIC to bound to. Value: NULL > apr_socket_bind on 0.0.0.0:0 > apr_mcast_join on 0.0.0.0:0 > apr_socket_sendto to 224.0.1.102:33364 > {noformat} > h4. Advertize RECEIVED > YES (/) > {noformat} > C:\Users\karm\WORKSPACE > λ "C:\Program Files\Java\jdk1.8.0_74\bin\java" Advertize 224.0.1.102 33364 > ready waiting... > received: Advertize !!! Mon, 21 Mar 2016 18:07:50 GMT > received from /192.168.122.52:61805 > {noformat} > YES (/) > {noformat} > C:\Users\karm\WORKSPACE > λ "C:\Program Files\Java\jdk1.8.0_74\bin\java" Advertize 224.0.1.102 33364 192.168.122.52 > ready waiting... > received: Advertize !!! Mon, 21 Mar 2016 18:07:50 GMT > received from /192.168.122.52:61805 > {noformat} > YES (/) > {noformat} > C:\Users\karm\WORKSPACE > λ "C:\Program Files\Java\jdk1.8.0_74\bin\java" Advertize 224.0.1.102 33364 192.168.122.199 > ready waiting... > received: Advertize !!! Mon, 21 Mar 2016 18:07:50 GMT > received from /192.168.122.52:61805 > {noformat} > h4. Advertise SENT > {noformat} > C:\Users\karm\advertise-build > λ advertise.exe -a 224.0.1.102 -p 33364 -n 192.168.122.199 > UDP Multicast address to send datagrams to. Value: 224.0.1.102 > UDP Multicast port. Value: 33364 > IP address of the NIC to bound to. Value: 192.168.122.199 > apr_socket_bind on 192.168.122.199:0 > apr_mcast_join on 192.168.122.199:0 > apr_socket_sendto to 224.0.1.102:33364 > {noformat} > h4. Advertize RECEIVED > YES (/) > {noformat} > C:\Users\karm\WORKSPACE > λ "C:\Program Files\Java\jdk1.8.0_74\bin\java" Advertize 224.0.1.102 33364 > ready waiting... > received: Advertize !!! Mon, 21 Mar 2016 18:09:55 GMT > received from /192.168.122.199:52781 > {noformat} > YES (/) > {noformat} > C:\Users\karm\WORKSPACE > λ "C:\Program Files\Java\jdk1.8.0_74\bin\java" Advertize 224.0.1.102 33364 192.168.122.52 > ready waiting... > received: Advertize !!! Mon, 21 Mar 2016 18:09:55 GMT > received from /192.168.122.199:52781 > {noformat} > YES (/) > {noformat} > C:\Users\karm\WORKSPACE > λ "C:\Program Files\Java\jdk1.8.0_74\bin\java" Advertize 224.0.1.102 33364 192.168.122.199 > ready waiting... > received: Advertize !!! Mon, 21 Mar 2016 18:09:55 GMT > received from /192.168.122.199:52781 > {noformat} > h3. Suggestion > Ideas? :) [~jfclere], [~rhusar] > I suggest setting {{bindaddr}} (AdvertiseBindAddress) default to main_server's address or MCMP enabled vhost instead of NULL. I'll post a PR for evaluation. -- This message was sent by Atlassian JIRA (v6.4.11#64026)

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[JBoss JIRA] (MODCLUSTER-496) Drop support for legacy JBoss AS 5/6 versions (sar module)

by Radoslav Husar (JIRA)

[ https://issues.jboss.org/browse/MODCLUSTER-496?page=com.atlassian.jira.pl... ] Radoslav Husar updated MODCLUSTER-496: -------------------------------------- Status: Resolved (was: Pull Request Sent) Resolution: Done > Drop support for legacy JBoss AS 5/6 versions (sar module) > ---------------------------------------------------------- > > Key: MODCLUSTER-496 > URL: https://issues.jboss.org/browse/MODCLUSTER-496 > Project: mod_cluster > Issue Type: Task > Components: Core & Container Integration (Java) > Reporter: Radoslav Husar > Assignee: Radoslav Husar > Fix For: 2.0.0.Alpha1 > > -- This message was sent by Atlassian JIRA (v6.4.11#64026)

7 years, 10 months

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[JBoss JIRA] (MODCLUSTER-410) OPTIONS call not returning available methods

by Michal Karm Babacek (JIRA)

[ https://issues.jboss.org/browse/MODCLUSTER-410?page=com.atlassian.jira.pl... ] Michal Karm Babacek commented on MODCLUSTER-410: ------------------------------------------------ Guys? What could be done here? -> [PR is Closed|https://github.com/modcluster/mod_cluster/pull/86#issuecomment-222...] > OPTIONS call not returning available methods > -------------------------------------------- > > Key: MODCLUSTER-410 > URL: https://issues.jboss.org/browse/MODCLUSTER-410 > Project: mod_cluster > Issue Type: Bug > Reporter: Roman Jurkov > Assignee: Jean-Frederic Clere > Priority: Minor > > options call returning just standard registered methods, that is because mod_cluster doesn't register methods through httpd api ap_method_register(). > by using apache api we can get free validation, and faster checks against method_number() instead of method name and strcmp(). -- This message was sent by Atlassian JIRA (v6.4.11#64026)

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[JBoss JIRA] (MODCLUSTER-263) Apache with mod_cluster refuses to start (create_mem_node)

by Michal Karm Babacek (JIRA)

[ https://issues.jboss.org/browse/MODCLUSTER-263?page=com.atlassian.jira.pl... ] Michal Karm Babacek closed MODCLUSTER-263. ------------------------------------------ Release Notes Text: One could set MemManagerFile to an allowed location on a particular system. Resolution: Out of Date > Apache with mod_cluster refuses to start (create_mem_node) > ---------------------------------------------------------- > > Key: MODCLUSTER-263 > URL: https://issues.jboss.org/browse/MODCLUSTER-263 > Project: mod_cluster > Issue Type: Bug > Environment: Windows 2008 R2 x86_64 > Reporter: Michal Karm Babacek > Assignee: Jean-Frederic Clere > Priority: Minor > Attachments: httpd.conf > > > If you try to run httpd on windows64-x86_64 with Mod_cluster modules from 1.0.10.GA_CP02 natives, you will encounter a failure: > {code:java|title=httpd\\logs\\error_log} > [emerg] create_mem_node C:/tmp/work/httpd/logs/manager.node failed > Configuration Failed > {code} > On the other hand, if you comment out Mod_cluster modules (and configuration) from httpd.conf, httpd starts OK. > It is noteworthy that the aforementioned file, *manager.node* is really not present in the *logs/* directory, however these files are: > {code:java|title=httpd\\logs} > C:\tmp\work\httpd\logs>ls > access_log manager.node.nodes ssl_access_log ssl_request_log > error_log manager.node.nodes.lock ssl_error_log > {code} > I would advocate that there is no Read/Write permission problem regarding the *logs/* directory. > *manager.node.nodes* and *manager.node.nodes.lock* files were created by Mod_cluster. -- This message was sent by Atlassian JIRA (v6.4.11#64026)

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[JBoss JIRA] (MODCLUSTER-307) Issues using mod_cluster with Tomcat 6 and Executor thread pools

by Michal Karm Babacek (JIRA)

[ https://issues.jboss.org/browse/MODCLUSTER-307?page=com.atlassian.jira.pl... ] Michal Karm Babacek commented on MODCLUSTER-307: ------------------------------------------------ [~aogburn] Is it still pertinent, given Tomcat 6's End Of Life? Could I close this as Out of Date? > Issues using mod_cluster with Tomcat 6 and Executor thread pools > ---------------------------------------------------------------- > > Key: MODCLUSTER-307 > URL: https://issues.jboss.org/browse/MODCLUSTER-307 > Project: mod_cluster > Issue Type: Bug > Affects Versions: 1.2.1.Final > Environment: -Tomcat 6 > -mod_cluster 1.2 > Reporter: Aaron Ogburn > Assignee: Paul Ferraro > Priority: Minor > > mod_cluster cannot properly determine connector pool statistics from Tomcat 6 when using an Executor thread pool. It fails with the following exception: > ERROR ContainerBackgroundProcessor[StandardEngine[Catalina]] org.apache.catalina.core.ContainerBase - Exception invoking periodic operation: > java.lang.IllegalStateException > at org.jboss.modcluster.container.catalina.CatalinaEngine.getProxyConnector(CatalinaEngine.java:153) > at org.jboss.modcluster.ModClusterService.connectionEstablished(ModClusterService.java:306) > at org.jboss.modcluster.mcmp.impl.DefaultMCMPHandler.status(DefaultMCMPHandler.java:372) > at org.jboss.modcluster.mcmp.impl.DefaultMCMPHandler.status(DefaultMCMPHandler.java:347) > at org.jboss.modcluster.ModClusterService.status(ModClusterService.java:460) > at org.jboss.modcluster.container.catalina.CatalinaEventHandlerAdapter.lifecycleEvent(CatalinaEventHandlerAdapter.java:239) > at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:142) > at org.apache.catalina.core.ContainerBase.backgroundProcess(ContainerBase.java:1385) > at org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.processChildren(ContainerBase.java:1649) > at org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.run(ContainerBase.java:1638) > at java.lang.Thread.run(Thread.java:619) -- This message was sent by Atlassian JIRA (v6.4.11#64026)

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[JBoss JIRA] (MODCLUSTER-154) Update docs to include basic iptables rules to allow mod_cluster multicast traffic

by Michal Karm Babacek (JIRA)

[ https://issues.jboss.org/browse/MODCLUSTER-154?page=com.atlassian.jira.pl... ] Michal Karm Babacek closed MODCLUSTER-154. ------------------------------------------ Resolution: Done Done in prod docs. > Update docs to include basic iptables rules to allow mod_cluster multicast traffic > ---------------------------------------------------------------------------------- > > Key: MODCLUSTER-154 > URL: https://issues.jboss.org/browse/MODCLUSTER-154 > Project: mod_cluster > Issue Type: Task > Affects Versions: 1.0.3.GA, 1.1.0.CR1 > Reporter: Samuel Mendenhall > Assignee: Jean-Frederic Clere > Priority: Minor > Fix For: 1.0.4.GA > > > By default RHEL/Fedora iptables rules blocks multicast traffic. At least on a single JBoss node with Apache and JBoss on the same machine the following iptables rule allows multicast traffic. If this rule isn't in place http://localhost/mod_cluster-manager will not show any nodes as multicast is blocked and Apache<->JBoss won't communicate > /sbin/iptables -I INPUT 5 -p udp -d 224.0.1.0/24 -j ACCEPT > /etc/init.d/iptables save > It may also be helpful to note the iptables rules when running in a cluster also as seen here: http://www.redhat.com/docs/en-US/JBoss_Enterprise_Application_Platform/5.... -- This message was sent by Atlassian JIRA (v6.4.11#64026)

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[JBoss JIRA] (MODCLUSTER-485) Move build to Travis CI and create matrix for JDK+Tomcat/AS7 proper dependencies build

by Radoslav Husar (JIRA)

[ https://issues.jboss.org/browse/MODCLUSTER-485?page=com.atlassian.jira.pl... ] Radoslav Husar updated MODCLUSTER-485: -------------------------------------- Status: Pull Request Sent (was: Coding In Progress) Git Pull Request: https://github.com/modcluster/mod_cluster/pull/174 > Move build to Travis CI and create matrix for JDK+Tomcat/AS7 proper dependencies build > -------------------------------------------------------------------------------------- > > Key: MODCLUSTER-485 > URL: https://issues.jboss.org/browse/MODCLUSTER-485 > Project: mod_cluster > Issue Type: Task > Reporter: Radoslav Husar > Assignee: Radoslav Husar > > I ran into this while adding support for Tomcat 9. > What the CI should be testing, give the number of JDKs and different container versions that we support, we should build with respective jdks and versions: > jdk6 + mvn verify -PTC6 > jdk7 + mvn verify -PTC7 > jdk7 + mvn verify -PAS7 > jdk8 + mvn verify -PTC8 > jdk7/8 + mvn verify -- This message was sent by Atlassian JIRA (v6.4.11#64026)

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[JBoss JIRA] (MODCLUSTER-303) Discovery protocol based on mod-cluster

by Michal Karm Babacek (JIRA)

[ https://issues.jboss.org/browse/MODCLUSTER-303?page=com.atlassian.jira.pl... ] Michal Karm Babacek commented on MODCLUSTER-303: ------------------------------------------------ See [my note on MODCLUSTER-282|https://issues.jboss.org/browse/MODCLUSTER-282?focusedComm...] regarding native code support for anything JGroups and comment, please. > Discovery protocol based on mod-cluster > --------------------------------------- > > Key: MODCLUSTER-303 > URL: https://issues.jboss.org/browse/MODCLUSTER-303 > Project: mod_cluster > Issue Type: Feature Request > Reporter: Vladimir Blagojevic > Assignee: Radoslav Husar > Fix For: 1.3.3.Final > > > In it previous life used to be https://issues.jboss.org/browse/JGRP-1322 > It would be nice to have a discovery protocol that can use mod-cluster as the source of the node information. > Mod-cluster already knows the list of participating nodes and provides this information in a well known format, so it could be simple to implement. -- This message was sent by Atlassian JIRA (v6.4.11#64026)

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[JBoss JIRA] (MODCLUSTER-492) mod_cluster should allow failover of GET requests by default

by Michal Karm Babacek (JIRA)

[ https://issues.jboss.org/browse/MODCLUSTER-492?page=com.atlassian.jira.pl... ] Michal Karm Babacek commented on MODCLUSTER-492: ------------------------------------------------ What exactly is here to do? * {{maxAttempts}} defaults to 1, so the native balacner *will* try another worker * {{stickySession*}} attributes are configurable on worker side... > mod_cluster should allow failover of GET requests by default > ------------------------------------------------------------ > > Key: MODCLUSTER-492 > URL: https://issues.jboss.org/browse/MODCLUSTER-492 > Project: mod_cluster > Issue Type: Enhancement > Components: Core & Container Integration (Java), Native (httpd modules) > Affects Versions: 1.3.2.Final > Reporter: Paul Ferraro > Assignee: Radoslav Husar > Fix For: 2.0.0.Alpha1 > > > For any well developed web application, all GET requests should be idempotent and safe for failing over to another node. This should be default behavior, with a configuration option to disable it. -- This message was sent by Atlassian JIRA (v6.4.11#64026)

7 years, 10 months

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[JBoss JIRA] (MODCLUSTER-282) Add JGroups support

by Michal Karm Babacek (JIRA)

[ https://issues.jboss.org/browse/MODCLUSTER-282?page=com.atlassian.jira.pl... ] Michal Karm Babacek commented on MODCLUSTER-282: ------------------------------------------------ [~pferraro] [~rhusar] [~jfclere] Unless there is an active resistance, I'll remove the relevant stubs and pieces from the native source code for mod_proxy_cluster 2.0. It's: * never been tested * most likely never used * not supported in any of Red Hat products * adding noise to the native code * possible to put it back once there is someone who would need it and could work on it > Add JGroups support > ------------------- > > Key: MODCLUSTER-282 > URL: https://issues.jboss.org/browse/MODCLUSTER-282 > Project: mod_cluster > Issue Type: Feature Request > Affects Versions: 1.2.0.Final > Reporter: Jean-Frederic Clere > Assignee: Radoslav Husar > Fix For: 1.3.3.Final > > > https://community.jboss.org/wiki/MOD-CLUSTERDiscoveryProtocol -- This message was sent by Atlassian JIRA (v6.4.11#64026)

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mod_cluster-issues May 2016