Upgrade to Pro — share decks privately, control downloads, hide ads and more …

Monitoring Docker with Mackerel

Monitoring Docker with Mackerel

Docker meetup Tokyo #3 2014-07-04

Shinji Tanaka

July 13, 2014
Tweet

More Decks by Shinji Tanaka

Other Decks in Technology

Transcript

  1. ϗετଆ͔ΒͷϞχλϦϯά • cgroupͷϨϙʔτΛར༻ • /sys/fs/cgroup/
          {cpuacct,

     memory}   • ଞʹblkio,  cpu,  devicesͳͲͷα ϒγεςϜ͕͋Δ(֤छ੍ݶͳͲͷ੍ ޚ༻) VCVOUVͷ৔߹
 LFSOFMHFOFSJDEPDLFS
  2. CPU࢖༻཰ • /sys/fs/cgroup/cpuacct/docker/{ίϯςφID}/cpuacct.stat ! ! ! • user … ϢʔβʔϞʔυͷCPU

    ࣌ؒ • system … γεςϜϞʔυͷCPU ࣌ؒ • CPU࣌ؒͷ୯Ґ: USER_HZ (σϑΥϧτ͸10ms) user  480   system  116
  3. ϝϞϦ࢖༻཰ • /sys/fs/cgroup/memory/docker/{ίϯςφID}/memory.stat cache  761856   rss  25681920   rss_huge

     0   mapped_file  16384   pgpgin  12569   …   total_cache  761856   total_rss  25681920   …   ͍ΘΏΔ344STT NBQQFE@pMF
  4. memory.statৄࡉ • cache   • rss   • mapped_file  

    • pgpgin   • pgpgout   • swap   • active_anon   • inactive_anon   • active_file   • inactive_file   • unevictable   • hierarchical_memory _limit   • hierarchical_memsw   • total_͸ࢠάϧʔϓΛ ؚΉ஋ ৄࡉIUUQTXXXLFSOFMPSHEPD%PDVNFOUBUJPODHSPVQTNFNPSZUYU
  5. memoryؔ࿈(ͦͷଞ) memory.usage_in_bytes ϝϞϦ࢖༻ྔ memory.memsw.usage_in_bytes ϝϞϦ࢖༻ྔͱεϫοϓྖҬͷ࿨ memory.max_usage_in_bytes ϝϞϦ࠷େ࢖༻ྔ memory.memsw.max_usage_in_bytes εϫοϓ࠷େ࢖༻ྔ memory.limit_in_bytes

    ϝϞϦͷ੍ݶ஋ memory.memsw.limit_in_bytes ϝϞϦͱεϫοϓ੍ݶ஋ memory.failcnt ϝϞϦ੍ݶ஋ʹୡͨ͠ճ਺ memory.memsw.failcnt ϝϞϦ੍ݶ஋ʹୡͨ͠ճ਺
  6. ڞ௨Ϩϙʔτ • tasks ࣮ߦதͷϓϩηεͷҰཡ(PID) • cgroup.procs ࣮ߦதͷεϨουάϧʔϓͷҰཡ(TGID) %  cat  /sys/fs/cgroup/memory/docker/…./cgroup.procs

      31218   31307   %  ps  aux  |  egrep  '(31218|31307)'   root          31218    0.0    0.0      4408      164  ?                Ss      13:15      0:00  /bin/sh  -­‐ c  rackup  -­‐p4567   root          31307    0.0    5.2  281364  26336  ?                Sl      13:15      0:06  ruby1.9.1   /usr/local/bin/rackup  -­‐p4567
  7. Webhook from Docker Hub {        "push_data":{  

               "pushed_at":1385141110,              "images":[                    "imagehash1"            ],              "pusher":"username"        },        "repository":{              "status":"Active",              "description":"my  docker  repo  that  does  cool  things",              "is_trusted":false,              "full_description":"This  is  my  full  description",              "repo_url":"https://registry.hub.docker.com/u/username/reponame/",
  8. mackerel-agent • Go Ͱॻ͔ΕͨެࣜΤʔδΣϯτ • Linux αϙʔτ (CentOS 5/6, Debian

    6/7) • ϗετεϖοΫͱϝτϦοΫΛऩू mackerelio/mackerel-agent
  9. agent: ΧελϜϝτϦοΫ • Sensu ϓϥάΠϯޓ׵ͷग़ྗ
 ʢλϒ۠੾Γʣ %  ~/.mackerel-­‐agent/plugins/chrome-­‐tabs-­‐count.sh   browser.tabs.count

               9              1403153173   browser.tabs.works            7              1403153173
  10. mackerel-docker • ϗετଆ͔ΒDockerίϯςφΛϞχλϦϯά ! • mackerel-agentͷઃఆ IUUQTHJUIVCDPNTUBOBLBNBDLFSFMEPDLFS %  cat  mackerel-­‐agent.conf


    [plugin.metrics.docker]
 command  =  "ruby  /home/stanaka/git/mackerel-­‐docker/mackerel-­‐ docker.rb"
  11. Dockerίϯςφ΁ͷ૊ࠐΈ • Dockerfile ! ! ! ! • Dockerίϯςφͷىಈ CMD

     echo  APIKEY=\"$APIKEY\"  >  /etc/default/mackerel-­‐agent  
 &&  echo  OTHER_OPTS="-­‐role=sample:${ROLE:-­‐app2}"  >>  /etc/default/mackerel-­‐ agent  
 &&  /etc/init.d/mackerel-­‐agent  start  
 &&  env  MACKEREL_APIKEY=$APIKEY  mkr  host  status  -­‐-­‐host-­‐id  `cat  /var/lib/ mackerel-­‐agent/id`  -­‐-­‐status  working  
 &&  rackup  -­‐p4567 docker  run  -­‐e  “APIKEY=……”  stanaka/meetup