Apache Infrastructure Team

Wednesday Dec 03, 2014

Subversion master undergoing emergency maintenance

[Read More]

Friday Nov 21, 2014

MoinMoin Service - User Account Tidy Up

In recent months we have become increasingly aware of a slowing down of our MoinMoin wiki service.  We have attributed this, at least in part, due to the way MoinMoin stores some data about user accounts.  

Across all of our wiki instances (in the farm) we had a little over 1.08 million distinct user accounts.  Many of which have never been used (spam etc).  So we have decided to archive all users who have not accessed any of the wiki sites they were registered for in more than 128 days.  

This has resulted in us being able to archive a little over 800k users.  This leaves us with around 200k users across 77 wikis. This still feels very high, and in the coming weeks we will investigate further still in how we can better understand if those remaining accounts are making valid changes, or are they just link farm home pages.

If you think your account was affected by this, and you would like to have your account restored, then please contact the Infra team using this page http://www.apache.org/dev/infra-contact

ASF Infra Team

Monday Oct 06, 2014

Code signing service now available

The ASF Infrastructure team is pleased to announce the availability of a new code signing service for Java, Windows and Android applications. This service is available to any Apache project to use to sign their releases. Traditionally, Apache projects have shipped source code. The code tarballs are signed with a GPG signature to allow users and providers to verify the code's authenticity, but users have either compiled their own applications or some projects have provided convenience binaries. With projects like Apache OpenOffice, users expect to receive binaries that are ready to run. Today's desktop and mobile operating systems expect that binaries will be signed by the vendor -- which had left a gap to be filled for Apache projects.  

After a great deal of research, we have chosen Symantec's Secure App Service offering to provide code signing service. This allows us to granularly permit access; and each PMC will have their own certificate(s) for signing. The per-project nature of certificate issuance allows us to revoke a signature without disrupting other projects. 

This service will permit projects to sign artifacts either via a web GUI or a SOAP API. In addition a Java client and an ant task for signing have been written and a maven plugin is under development.

This service results in a 'pay for what you use' scenario, so PMCs are asked to use the service responsibly. To that end, projects will have access to a test environment to ensure that they have their process working correctly before consuming actual credits.

Thus far, we've had two projects who have helped testing this and working out process for which we are very grateful. Those projects, Commons and Tomcat, have successfully released signed artifacts recently. (Commons Daemon 1.0.15 and Tomcat 8.0.14)

Projects that wish to use this service should open an Infra JIRA ticket under the Codesigning component. Further information for projects using the service is also maintained by the infra team

Thursday Oct 02, 2014

GitHub pull request builds now available on builds.apache.org

The ASF Infrastructure team is happy to announce that you can now set up jobs on builds.apache.org to listen for pull requests to github.com/apache repositories, build that pull request’s changes, and then comment on the pull request with the build’s results. This is done using the Jenkins Enterprise GitHub pull request builder plugin, generously provided to the ASF by our friends at CloudBees. We've set up the necessary hooks on all github.com/apache repositories that are up as of Wednesday, Oct 1, 2014, and will be adding the hooks to all new repositories going forward.

Here’s what you need to do to set it up:

  • Create a new job, probably copied from an existing job.
  • Make sure you’re not doing any “mvn deploy” or equivalent in the new job - this job shouldn’t be deploying any artifacts to Nexus, etc.
  • Check the "Enable Git validated merge support” box - you can leave the first few fields set to their default, since we’re not actually pushing anything. This is just required to get the pull request builder to register correctly.
  • Set the “GitHub project” field to the HTTP URL for your repository - i.e.,"http://github.com/apache/incubator-brooklyn/"- make sure it ends with that trailing slash and doesn’t include .git, etc.
  • In the Git SCM section of the job configuration, set the repository URL to point to the GitHub git:// URL for your repository - i.e., git://github.com/apache/incubator-brooklyn.git.
  • You should be able to leave the “Branches to build” field as is - this won’t be relevant anyway.
  • Click the “Add” button in “Additional Behaviors” and choose "Strategy for choosing what to build”. Make sure the choosing strategy is set to “Build commits submitted for validated merge”.
  • Uncheck any existing build triggers - this shouldn’t be running on a schedule, polling, running when SNAPSHOT dependencies are built, etc.
  • Check the “Build pull requests to the repository” option in the build triggers.
  • Optionally change anything else in the job that you’d like to be different for a pull request build than for a normal build - i.e., any downstream build triggers should probably be removed,  you may want to change email recipients, etc.
  • Save, and you’re done!

Now when a pull request is opened or new changes are pushed to an existing pull request to your repository, this job will be triggered, and it will build the pull request. A link will be added to the pull request in the list of builds for the job, and when the build completes, Jenkins will comment on the pull request with the build result and a link to the build at builds.apache.org

In addition, you can also use the "Build when a change is pushed to GitHub" option in the build triggers for non-pull request jobs, instead of polling - Jenkins receives notifications from GitHub whenever one of our repositories has been pushed to. Jenkins can then determine which jobs use that repository and the branch that was pushed to, and trigger the appropriate build.

If you have any questions or problems, please email builds@apache.org or open a BUILDS JIRA at issues.apache.org

Thursday Sep 25, 2014

Committer shell access to people.apache.org

Apache committers are granted shell access to a host know as either people.apache.org or minotaur. As you may know, there has been a two year grace period in which we have advertised the upcoming change away from password logins to SSH key only.

Due to a recent significant increase in security issues, the Infrastructure team has taken steps to complete the implementation of key-only logins to protect ASF computing resources. 

If you can't access the host anymore then it is very likely you do not have your key stored in LDAP.  Please check your LDAP data in https://id.apache.org - and add your key(s) if they are not present.  If neccessary, ensure your keys are loaded locally (for linux see http://linux.die.net/man/1/ssh-add  and http://linux.die.net/man/1/ssh-agent)

The host will pick up this change within 5 minutes of you making your change and you should be able to get in again.

As always if you have any issues please open a JIRA issue in the INFRA project and we will help you as soon as we can.  

Committers mail relay service

For a very long time now we have allowed committers to send email from their @apache.org email address from any host.  10 years ago this was less of an issue than it is today.  In the current world of mass spam and junk flying around, mail server providers are trying to find better ways to implement a sense of safety from this for their users.  One such method is SPF [1]. These methodologies check that incoming email actually originated via a valid mail server for the senders domain. 

For example if you send from myuserid@apache.org, but you just send that via your ISP at home, it could be construed as being junk as it never came via an apache.org mail server.  Some time ago we setup a service on people.apache.org to cater for this, but it was never enforced and it seems that the SMTP daemon running the service is not 100% RFC compliant and thus some people have been unable to use this service.

As of today, we have stood up a new service on host mail-relay.apache.org that will allow committers to send their apache.org emails via a daemon that is RFC compliant and uses your LDAP credentials. You can read here [2] what settings you will need to be able to use this service. 

On Friday October 10th, at 13:00 UTC the old service on people.apache.org will be terminated, and the updates to the DNS to enforce sending of all apache.org email to have originated via an ASF mail server will be enabled. This means that as of this time if you do not send your apache.org email via mail-relay it is very likely that the mail will not reach it's destination.  

When we say 'send your apache.org email'  - we mean that when you send *from* your userid@apache.org email.   Emails sent *to* any apache.org email address will not affected by this. 

[1] - http://en.wikipedia.org/wiki/Sender_Policy_Framework

[2] - https://reference.apache.org/committer/email#sendingemailfromyourapacheorgemailaddress

Thursday Sep 11, 2014

Nexus reduced performance issues resolved.

    HI All,

So Tuesday morning we got a report in IRC that a committer was trying to get a release out
and could not deploy. Shortly after a Nexus issue was reported in Jira INFRA-8321. A few
hours later another issue INFRA-8322 related to Nexus was opened. So far, nothing unusual
about that.

Yesterday, more issues reported on IRC/HipChat, and more issues opened.
(INFRA-8326,INFRA-8327,INFRA-8328, INFRA-8334). By then it was obvious this more than
a coincidence and it was already being looked into.

Twitter notifications and emails were sent out declaring the degraded performance an outage
and On Call was full time looking into the issue. Others joined the call to assist and eventually
the outage was determined to be a change to LDAP configuration made 2 days ago by Infra.

(See infra:r921805 for the revert of that.)

The LDAP change was made to improve response times as it was being reported as being slow
to return queries. Reverting the change cured the issues Nexus was having contacting the
groups that committers belonged to.

There will be another avenue looked into for improving LDAP query response times whilst not
affecting those services that connect via anon bind.

Infra thanks everyone for their patience whilst this was looked into and resolved.

Thanks go to those involved in working towards the solution:-

Gavin McDonald (gmcdonald)
Tony Stevenson (pctony)
Chris Lambertus (cml)
Daniel Gruno (humbedooh)
Brian Fox (brianf)



Thursday Sep 04, 2014

On-demand slaves from Rackspace added to builds.apache.org

A couple weeks ago, Apache's Infrastructure team added a new feature to our Jenkins server, builds.apache.org. In order to help deal with the at times overwhelming queues of builds waiting for an executor. While this has been improved dramatically by the increase in slaves generously provided by Yahoo! on physical hosts, we're always trying to look forward and be prepared for increased usage, etc in the future. 

To that end, we've set up slave images on Rackspace, generated using the fantastic tool Packer. Using the Apache jclouds plugin for Jenkins, Ubuntu slaves will be spun up dynamically on Rackspace using those images when there's a queue of pending builds that are able to run on the “ubuntu” label. Up to five of these slaves can be going at a time, and they're automatically removed from Jenkins and destroyed on Rackspace once they've been idle a set period of time. This burst capacity will help us prevent a long wait for builds to run on builds.apache.org.

We're able to do this thanks to Rackspace generously donating resources to the Apache Software Foundation. We're extremely grateful for this, and if any other public cloud providers are also interested in donating compute cycles to the Foundation, please contact the Infrastructure team.

One thing to note - the slave image we're using is still new and may have bugs in it. If you see your build suddenly failing for mysterious reasons, please take a look at the slave at ran on - if it's a slave named something like “jenkins-ubuntu-1404-4gb-abc”, please open a BUILDS JIRA at issues.apache.org with a link to the failing build and we'll investigate.

We've got more improvements for builds.apache.org planned for the future, and we're looking forward to sharing them with all of you - there'll be a talk at ApacheCon EU this November on the current status of Jenkins at the ASF, what we've done to stabilize and improve the developer experience on builds.apache.org this year, and what's planned for the future - hope to see you there!

Monday Aug 18, 2014

Infrastructure Team Adopting an On-Call Rotation

As the Apache Software Foundation (ASF) has grown, the infrastructure required to support its diverse set of projects has grown as well. To care for the infrastructure that the ASF depends on, the foundation has hired several contractors to supplement the dedicated cadre of volunteers who help maintain the ASFs hardware and services. To best utilize the time of our paid contractors and volunteers, the Infrastructure team will be adopting an on-call rotation to meet requests and resolve outages in a timely fashion. 

Why We're Establishing an On-Call Rotation

In groups, especially groups that are charged with overlapping duties, there's occasionally a sense of diffusion of responsibility. There tends to be a good number of tasks or incidents that routinely occur that need a clear owner. We've also tried to set expectations around our service levels relative to the importance of a service. In example, a new mailing list can be set up as convenient, but a failing mail service needs to be addressed immediately.

The technical side of this has been that we have historically alerted via email and/or SMS about any urgent issues that came up. Of course those alerts went to everyone on the team. If the alert occurs at an inconvenient time, either everyone responds, which is likely wasteful, or no one responds thinking someone else will.

At the Infrastructure team's face to face meeting in July we decided we'd adopt an on-call rotation for the contractors so that everyone wasn't responsible for everything all of the time. We then went looking for something to let us sanely (and without building it ourselves) deal with that.

We ended up choosing PagerDuty, which has a number of ways of receiving alerts. More importantly, it allows us to set a schedule, easily override it for holidays or illnesses, and do so programmatically. It also seamlessly integrates with HipChat, which Infrastructure is running a trial of and communicates with our mobile devices.

PagerDuty also supports a clear escalation path that begins alerting other people about issues if the person on-call fails to respond in a timely manner. Additionally, PagerDuty's mobile apps are built with Apache Cordova, which is an interesting circle. We've finished our trial and decided to adopt PagerDuty. PagerDuty was especially gracious and made our account gratis.

Adopting an on-call rotation will allow us to provide a better service and response time, while also clearly setting expectations around contractor availability so they can relax on their off weeks.

If you have questions or want to get involved, feel free to join us on the infrastructure mailing list infrastructure@apache.org or joining us in our Hipchat room.

Thursday Aug 14, 2014

New status page for the ASF

We are pleased to announce that we have a new status page for our infrastructure and the ASF as a whole.

Where we have previously been focused on reporting the up/down status of our services, we have now begun to look a bit more at the broader picture of the ASF; What's going on, who is committing how much, where are emails going, what's going on on GitHub mirrors and so on, as well as tracking uptime and availability for our public services that power the ASF's online presence.

The result of this broader scope can be seen on: http://status.apache.org

It is our hope that you'll find this new status page informative and helpful, both in times of trouble and times where everything is in working condition.

Sunday Jun 15, 2014

Email from apache.org committer accounts bypasses moderation!

Good news!   We've finally laid the necessary groundwork to extend the bypassing of committer emails sent from their apache.org addresses, from commit lists to now all Apache mailing lists.  This feature was activated earlier today and represents a significant benefit for cross-collaboration between Apache mailing lists for committers, relieving moderators of needless burden.

Also we'd like to remind you of the SSL-enabled SMTP submission service we offer committers listening on people.apache.org port 465.  Gmail users in particular can enjoy a convenient way of sending email, to any recipient even outside apache.org, using their apache.org committer address.  For more on that please see our website's documentation.

To complement these features we'd also like to remind committers of the ability to request an "owner file" be added to their email forwarder by filing an appropriate INFRA jira ticket.  Owner files alleviate most of the problems associated with outside organizations, who may be running strict SPF policies, attempting to reach you at your apache.org address.  Without an owner file those messages will typically bounce back to those organizations instead of successfully reaching you at your target forwarding address.  For those familiar with SRS, this is a poor-man's version of that specification's feature set.  Please direct your detailed questions about owner files to the infrastructure-dev@apache.org mailing list.

NOTE: we've extended this bypass feature to include any committer email addresses listed in their personal LDAP record with Apache.

Tuesday Jun 03, 2014

DMARC filtering on lists that munge messages

Since Yahoo! switched their DMARC policy in mid-April, we've seen an increase in undeliverable messages sent from our mail server for Yahoo! accounts subscribed to our lists.   Roughly half of Apache's mailing lists do some form of message munging, whether it be Subject header prefixes, appended message trailers, or removed mime components.  Such actions are incompatible with Y!'s policy for its users, which has meant more bounces and more frustration trying to maintain inclusive discussions with Y! users.

Since Y!'s actions are likely just the beginning of a trend towards strong DMARC policies aimed at eliminating forged emails, we've taken the extraordinary step of munging Y! user's From headers to append a spec-compliant .INVALID marker on their address, and dropping the DKIM-Signature: header for such messages.  We are an ezmlm shop and maintain a heavily customized .ezmlmrc file, so carrying this action out was relatively straightforward with a 30-line perl header filter prepended to certain lines in the "editor" block of our .ezmlmrc file.  The filter does a dynamic lookup of DMARC "p=reject" policies to inform its actions, so we are prepared for future adopters beyond the early ones like Yahoo!, AOL, Facebook, LinkedIn, and Twitter.   Interested parties in our solution may visit this page for details and the Apache-licensed code.

Of course this filter only applies to half our lists- the remainder that do no munging are perfectly compatible with DMARC rejection policies without modification of our list software or configuration.  Apache projects that prefer to avoid munging may file a Jira ticket with infrastructure to ask that their lists be set to "ezmlm-make -+ -TXF" options.

Wednesday May 28, 2014

Mail outage post-mortem

During the afternoon of May 6th we began experiencing delays in mail delivery of 1-2 hours. Initial efforts at remediation seemed to clear this up but on the morning of May 7th the problem worsened and we proactively disabled mail service to deal with the failure. This outage affected all ASF mailing lists and mail forwarding. The service remained unavailable until May 10th, and it took almost 5 additional days to fully flush the backlog of messages.

You can find a timeline here that was kept during the incident: https://blogs.apache.org/infra/entry/mail_outage

This was a catastrophic failure for the Apache Software Foundation as email is core to virtually every operation and is our primary communication medium.  

What happened:

The mail service at the ASF is composed of three physical servers. Two of these are external facing mail exchangers that receive mail. The final server handles mailing list expansion, alias forwarding and mail delivery in general. That latter server had two volumes that experienced a disk outage each. This degraded performance substantially and led to the mail delays seen on May 6th and 7th. The service was proactively disabled on May 7th in an attempt to let the arrays rebuild without the significant disk I/O overhead caused by processing the large mail backlog. Ultimately multiple attempts to rebuild the underlying arrays failed and eventually other drives in the array where the data volume was stored failed rendering recovery a hopeless task on May 8th. We began working to restore backups from our offsite backup location to our primary US datacenter. When this began to take longer than expected, additional concurrent efforts began to restore service in one of our secondary datacenters as well as in a public cloud instance. Ultimately we ended up completing the restoration to our primary US datacenter first and were able to bring the service online. When the service resumed, we had an estimated 10 million message backlog in addition to our normal 1.7-2 million ongoing daily message flow. The amount of backlogged mail taxed the existing infrastructure and architecture of the mail service and took almost 5 days to completely clear.

What worked:

Our backups were sufficient to allow us to restore the service in good working order.
Early precautions taken when we discovered the problem combined with our backups resulted in no data loss from the incident.
Our mail exchangers continued to work during the outage and held incoming mail until the service was restored.

What didn't work:

Our monitoring was not sufficient to identify the problem or alert us to the symptoms.
No spare hard drives for this class of machine were on-hand in our primary datacenter. 
The restore time from our remote backups took an excessively long time. This was partially due to the large size of the restore data, and partially due to the transport method used for the data.
After the service was restored we had approximately a 10M message backlog that took days to clear.
The primary administrator of the service was on vacation, and the remaining infrastructure contractors were not intimately familiar with the service. 
Our documentation was insufficient to easily restore the service in a rapid manner by folks without intimate knowledge. 

Remediation plan:

Our immediate action items:

  • Update the documentation to be current/diagram mail flow.
  • Improve the monitoring of the mail service itself as well as the hardware.
  • Insure we have adequate spares on hand for the majority of our core services.
  • Place our mail server under configuration management to reduce our MTTR

Medium-to-Long term initiatives.
  • Crosstraining contractors in all critical services
  • Work on moving to a more fault-tolerant/redundant architecture
  • More fully deploy our config management and automated provisioning across our infrastructure so MTTR is reduced.


Friday May 23, 2014

New monitoring system: nagios is dead long live circonus

23 may 2014 the old monitoring system "nagios" was put to sleep, and "circonus" was given production status.

The new monitoring system is sponsored by circonus and most of the monitoring as well as the central database runs on www.circonus.com. The infrastructure team have built and deployed logic around the standard circonus system:
- A private broker, to monitor internal services  without exposing them on internet
- A dedicated broker (inhouse development) that monitor special ASF systems (like svn compare US - EU)
- A configuration system, that are based on svn.
- A new status page status.apache.org
- A new team structure (all committers with sudo karma on a vm, get an email when something happens with the vm)

The new system is a lot faster and we can therefore offer projects monitoring of project URLs, of course the project also need to have a team that handles the alerts.

The current version has approx. the same facilities as Nagios, but we are planning (and actively programming) a version.2 that will allow us to better predict problems before they occur.

Some of the upcoming features are:
- disk monitoring
- vital data statistic from core system (like size of mail queues)

The change of monitoring system is a vital component in our transition to automate services and thereby enable infra to more effectively secure the stability of the infrastructure as well as make early detection of potential problems.

The system was presented in Apachecon denver 2014, slides can be found  here. We hope to present the live version at apachecon budapest 2014.

On behalf of the infrastructure team

jan I.

Wednesday May 07, 2014

Mail outage

During the afternoon of May 6th we began experiencing delays in mail delivery of 1-2 hours. Initial efforts at remediation seemed to clear this up but on the morning of May 7th the problem worsened and we proactively disabled mail service to deal with the failure. The underlying hardware suffered failures on multiple disks. This outage effects all ASF mailing lists and mail forwarding.

 This service is housed at OSUOSL, and we are currently waiting on smart hands to help with replacing hardware. Our expectation at this point is that we still have multiple hours worth of outage. 

 Incoming mail is currently being received and held in queue by our mail exchangers. We also have a copy of the existing queue that hasn't been processed; so we expect no mail or data loss.  

ASF Infra's twitter bot will provide updates as we have them for the duration of the outage. Feel free to follow @infrabot on Twitter. There will be an update on this post as well as the situation progresses.

UPDATE 7 May 19:27 UTC - Drives have been replaced, array is attempting to rebuild. As indicated earlier on twitter, there likely remains hours of outage.  

UPDATE 7 May 20:44 UTC - The disk array is still in the process of repairing. Several hundred mails were processed during a reboot, but more work remains before service is restored.  Mail service has been disabled again as the array repair process is CPU-bound. The plan going forward is to allow the disk arrays to finish repairs. Once that is complete, we'll reenable the mail service and flush what is currently in the queue. Finally, once the queue is empty we'll begin receiving mail again.

UPDATE 8 May 05:00 UTC - The disk array failed to repair itself. The disks have been replaced and a new installation has been completed. Progress continues to be made towards resolution, but nothing firm enough yet for us to predict an time for restoration.

UPDATE 8 May 15:45 UTC - No material change of status has occurred. Infra worked in shifts around the clock last night and continue to do so to restore service. More updates as they become available.  

UPDATE 9 May 11:20 UTC - We are working on temporarily restoring the most essential email aliases. In the meantime, inquiries may be made to infrastructure@apache.pw or on our IRC channel, #asfinfra on Freenode. The work on restoring the service in full is still ongoing.

UPDATE 9 May 17:20 UTC - We've successfully restored a host from backups and will be starting testing soon. Based on the progress made in those tests we'll try and provide expectations around restoration of service timeline.

UPDATE 10 May 15:45 UTC - We've started pushing live mails through the system - you'll begin to see them trickle in as we gradually open the floodgates to restore service. Expect intermittent spurts for a while. 

UPDATE 10 May 21:55 UTC -  The floodgates have been opened.  As we have a significant amount of backlog to catch up on, please be patient as the service does this.  As always feel free to contact us if you have any questions. In the immediate short term (next day or so, we suggest you continue to use infrastructure@apache.pw and our IRC channel, #asfinfra on Freenode.  We would like to thank you for your patience during this extremely busy time. 

UPDATE 12 May 16:04 UTC - Clarification - we have opened the floodgates, but have a substantial amount of backlog; and with the sudden rush of mail are being throttled by various mail services. With the addition of mail thats coming through anyway; it may take us from 2-5 days to fully flush the backlog. This time is so wide because of a wide variety of factors that are largely outside of our control, such as new mail coming in and mail services individual throttling policies.  



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