Archive for August, 2009

downtime page in apache

Monday, August 24th, 2009

It is good practice to send 503 Status codes when your site has downtime or is doing an upgrade.

The easiest way to do this for all your URLs is something like this using mod_asis:

       # Bind mod_asis to files ending in .asis
       AddHandler send-as-is asis
       # Add other Aliaes/AliasMatches for any other resources needed (logos, css, etc)
       Alias /logo.png /opt/mysite/maint/logo.png
       # The magic line, pulling all matching URLs into one file
       AliasMatch /(.*) /opt/mysite/maint/index.html.asis

Your index.html.asis would contain something like this:

Status: 503
Cache-Control: no-cache
Content-type: text/html

<html><h1>My site is down, be back soon!</h1></html>

I can’t help you make a fail whale / plumber image though, that is up to you

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email is awesome

Sunday, August 23rd, 2009

my favorite part of mbox_parse.c:

/**
 * List of all C-T-E Types found on httpd-dev and FreeBSD-current:
 *
 * Content-Transfer-Encoding:      8bit
 * Content-Transfer-Encoding:  7bit
 * Content-Transfer-Encoding: 7BIT
 * Content-Transfer-Encoding: 7Bit
 * Content-Transfer-Encoding: 7bit
 * Content-Transfer-Encoding: 8-bit
 * Content-Transfer-Encoding: 8BIT
 * Content-Transfer-Encoding: 8Bit
 * Content-Transfer-Encoding: 8bit
 * Content-Transfer-Encoding: BASE64
 * Content-Transfer-Encoding: BINARY
 * Content-Transfer-Encoding: Base64
 * Content-Transfer-Encoding: QUOTED-PRINTABLE
 * Content-Transfer-Encoding: Quoted-Printable
 * Content-Transfer-Encoding: base64
 * Content-Transfer-Encoding: binary
 * Content-Transfer-Encoding: none
 * Content-Transfer-Encoding: quoted-printable
 * Content-Transfer-Encoding: x-uuencode
 * Content-Transfer-Encoding:7bit
 * Content-Transfer-Encoding:quoted-printable
 *
 * This is why we have RFCs.
 */

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zfs+freebsd pain

Thursday, August 20th, 2009

Having some fun times with people.apache.org:

minotaur# uname -a
FreeBSD minotaur.apache.org 7.2-STABLE FreeBSD 7.2-STABLE #0: Wed Aug  5 01:05:27 UTC 2009     root@loki.apache.org:/usr/obj/usr/src/sys/MINOTAUR  amd64
minotaur# zpool status
  pool: tank
 state: DEGRADED
status: One or more devices is currently being resilvered.  The pool will
        continue to function, possibly in a degraded state.
action: Wait for the resilver to complete.
 scrub: resilver in progress for 0h1m, 0.01% done, 266h36m to go
config:

        NAME           STATE     READ WRITE CKSUM
        tank           DEGRADED     0     0     0
          raidz2       DEGRADED     0     0     0
            replacing  DEGRADED     0     0     0
              da14     UNAVAIL      3   570     0  experienced I/O failures
              da0      ONLINE       0     0     0  6.24M resilvered
            da1        ONLINE       0     0     0  4.06M resilvered
            da2        ONLINE       0     0     0  4.15M resilvered
            da3        ONLINE       0     0     0  4.09M resilvered
            da4        ONLINE       0     0     0  4.14M resilvered
            da5        ONLINE       0     0     0  4.10M resilvered
            da6        ONLINE       0     0     0  4.15M resilvered
            da7        ONLINE       0     0     0  4.11M resilvered
            da8        ONLINE       0     0     0  4.17M resilvered
            da9        ONLINE       0     0     0  4.08M resilvered
            da10       ONLINE       0     0     0  4.13M resilvered
            da11       ONLINE       0     0     0  4.14M resilvered
            da12       ONLINE       0     0     0  4.14M resilvered
            da13       ONLINE       0     0     0  4.08M resilvered
        spares
          da14         AVAIL   

errors: No known data errors

da14 failed. we had da0, not in the array yet, so we just did:

zpool replace tank da14 da0

But now it is stuck.

It never makes progress on the Resliver.

It sure sounds like this bug:
http://bugs.opensolaris.org/view_bug.do?bug_id=6655927

But this is FreeBSD 7-STABLE from earlier this month, and it really shouldn’t be affected by that bug.

Sigh.

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the comcast local monopoly sucks

Wednesday, August 12th, 2009

I pay Comcast $155.00 a month for TV and fast internet — baring the download limits I never hit, It is an acceptable service, even if still overpriced.

bank_error_in_your_favor

Yesterday I got a call from Comcast.  I didn’t think much of it.  At least how I remember it, the lady said the Auto-bill pay had made a mistake and over charged me for July.  $240 instead of $155 or something.  And they noticed this mistake, and had corrected it. Great so.. I should just be getting a credit. Woohoo money back I never noticed leaving.

Today when I woke up, the internet wasn’t working.

monopoly-go-to-jail-card

It was showing a stupid comcast activation screen.  To activate…. it wanted me to download some comcastic activation software.  Screw it, I was feeling particularly dumb this morning and I did on my older Macbook Pro.  It completely FUBARed up my network settings.  Glad I didn’t do it on my primary work machine.

Okay, well, one dead laptop later, I decided to call Comcast.

I will give Comcast some credit here, I was speaking to a Real Human Being in less than 2 minutes.  I remember being on hold for USWest/Qwest for hours when dealing with any DSL issues.

I just try to play dumb, ‘my internet has stopped working’, and the lady says it was turned off for non-payment.

Non-payment? I’ve had auto-bill pay on for 4 years, since I moved in.  I have auto-bill-pay with Comcast because I never ever ever want to deal with their crap or be on the phone with them. I WANT FAST INTERNET AND LEAVE ME ALONE.

It turns out that $242 was from someone ELSE who had paid onto MY account in June.

What happened yesterday is that Comcast reversed that payment, and since the auto-bill pay thought I had already paid for June and most of July, and now I had a delinquent charge of $242, overdue for 2 months.

So they turned off my service.

Well, turning off my service for when they fucked up sure is one way to get my attention.

So, I paid $403 to keep the internet flowing.  It isn’t like I had a choice in high speed internet.

In my rage I did change my TV plan from Digitial Rare-Metal to the basic standard plan, but I wish I could of just canceled my entire account.

If I had a choice, I would choose any other service that can offer me 20 megabit/second downloads.

AT&T in theory can offer DSL service in my area, but I don’t have a landline, and they don’t offer anywhere near 20mbit/second downloads.

Sigh.
Edit: While writing this post, Safari crashed. Twice.  :rage:

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malloc debugging on OSX

Tuesday, August 11th, 2009

I can never remember all of the options for malloc(3) on OSX when debugging. So I’m posting it here so I can find it with Google Search next time I need to find it:

export MallocLogFile=/tmp/malloc.log
export MallocGuardEdges=1
export MallocStackLogging=1
export MallocStackLoggingNoCompact=1
export MallocPreScribble=1
export MallocScribble=1
export MallocCheckHeapAbort=1
export MallocBadFreeAbort=1
ulimit -c unlimited

similar malloc debugging for linux:

MALLOC_TRACE=/tmp/out.log

related: memcheck.
and more info on the suse wiki.

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