Monitoring Docker with Mackerel (2015 ver.)

クラウドごった煮 2015/3/28

Transcript

1. Monitoring Docker with Mackerel 
 2015೥ฤ Ϋϥ΢υͬͨࣽ͝ #11, 2015/03/28 Hatena Co., Ltd. Shinji Tanaka @stanaka
2. Shinji Tanaka / ాத৻࢘ @stanaka / id:stanaka גࣜձࣾ͸ͯͳ ࣥߦ໾һCTO 2
3.  ͋͋ ࠷ۙɺిࢠ൛΋ग़ͨΑ͏Ͱ͢
4. Agenda • Docker (cgroup) Statics • Host/Container Patterns • Monitoring Docker with Mackerel
5. 1 Docker (cgroup) Statistics
6. DockerͷϞχλϦϯάͷجຊ • cgroupͷ࡞๏ʹै͏ • ίϯςφଆ͔Β͸ɺϗετશମ͔͠ ݟ͑ͳ͍ • /proc/loadavg,  /proc/stat   • ݟ͍ͨ৔߹͸`-­‐v`ͰऔΓࠐΉ
7. ϗετଆ͔ΒͷϞχλϦϯά • cgroupͷϨϙʔτΛར༻ • /sys/fs/cgroup/
          {cpuacct,  memory}   • ଞʹblkio,  cpu,  devicesͳͲͷα ϒγεςϜ͕͋Δ(֤छ੍ݶͳͲͷ੍ ޚ༻) VCVOUV
   ͷ৔߹
 LFSOFM
   HFOFSJD
   
   EPDLFS
   
8. CPU࢖༻཰ • /sys/fs/cgroup/cpuacct/docker/{ίϯςφID}/cpuacct.stat ! ! ! • user … ϢʔβʔϞʔυͷCPU ࣌ؒ • system … γεςϜϞʔυͷCPU ࣌ؒ • CPU࣌ؒͷ୯Ґ: USER_HZ (σϑΥϧτ͸10ms) user  480   system  116
9. cpuacctͷଞͷࢦඪ • cpuacct.usage: ૯CPU࣌ؒ (φϊඵ)
 echo 0 > /cgroup/cpuacct/cpuacct.usage 
 ͰϦηοτ • cpuacct.usage_percpu: ֤CPUͷCPU ࣌ؒ (φϊඵ)
10. 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   …   ͍ΘΏΔ344
    
    STT
    
    NBQQFE@pMF
11. 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஋ ৄࡉ
    IUUQTXXXLFSOFMPSHEPD%PDVNFOUBUJPODHSPVQTNFNPSZUYU
12. 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਺
13. 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
14. 2 Host/Container Patterns
15. ϗετͱίϯςφͷؔ܎ • 1:n • CIαʔόɾ։ൃαʔόͳͲ • 1:1 • ϓϩμΫγϣϯ؀ڥͳͲ
16. Pattern 1:n • CIαʔόɾ։ൃαʔό • ίϯςφԾ૝Խ؀ڥΛଟ਺ಈ࡞ • ಠཱͨ͠؀ڥ • ىಈఀࢭ͕ߴ଎ • Ϧιʔεͷڞ༗ʹΑΔޮ཰Խ
17. Pattern 1:n • CIαʔόɾ։ൃαʔό )PTU "QQ qVFOUE NBDLFSFM
    BHFOU "QQ +FOLJOT
18. Pattern 1:1 • ίϯςφԾ૝؀ڥΛҰͭͷΈಈ࡞ • ϦιʔεΛಠ઎ • ؀ڥߏங໘ʹಛԽ • ϓϩμΫγϣϯ؀ڥʹ߹͏ • AWS BeanstalkͷDocker support
19. Pattern 1:1 • ϓϩμΫγϣϯαʔό )PTU qVFOUE NBDLFSFM
    BHFOU "QQ
20. 3 Monitoring Docker with Mackerel
21. Mackerel https://mackerel.io/
22. ಛ௃ • ʮ໾ׂʯʹΑΔϗετ܈ͷ؅ཧ • ΤʔδΣϯτʹΑΔϦιʔε؂ࢹ ϩ ʔ ϧ
23. ϩʔϧຖͷάϥϑͰՄࢹԽ
24. mackerel-agent • Go Ͱॻ͔ΕͨެࣜΤʔδΣϯτ • Linux αϙʔτ (CentOS 5/6, Debian 6/7) • ϗετεϖοΫͱϝτϦοΫΛऩू mackerelio/mackerel-agent
25. Blue-green DeploymentରԠ • ϩʔϧ୯ҐͰͷՄࢹԽ • ୀ໾ࡁΈίϯςφͷάϥϑ΋อ࣋ Deployment
26. ΦʔτεέʔϧରԠ • αʔό͕ॖୀͯ͠΋άϥϑ͸࢒Δ
27. Raspberry Pi Ͱ΋ಈ͖·͢ • Թ౓ɾ࣪౓ηϯα → Slack௨஌
28. Docker
 with Mackerel
29. mackerel/mackerel-agent on Docker Hub https://registry.hub.docker.com/u/stanaka/mackerel-­‐agent/
30. How to Use • ίϚϯυҰൃ • ඞཁͳύεɾAPIKEYΛ౉͢ docker  run  -­‐h  `hostname`  \      -­‐v  /var/run/docker.sock:/var/run/docker.sock  \      -­‐v  /var/lib/mackerel-­‐agent/:/var/lib/mackerel-­‐agent/  \      -­‐v  /proc/mounts:/host/proc/mounts:ro  \      -­‐v  /sys/fs/cgroup/:/host/sys/fs/cgroup:ro        -­‐e  'apikey=<APIKEY>‘  \      mackerel/mackerel-­‐agent  
31. DockerFile(ൈਮ) FROM  debian:jessie   ! #  setup  mackerel-­‐agent   RUN  apt-­‐get  update  \   ..      &&  apt-­‐get  -­‐y  install  mackerel-­‐agent  \   ..   ! #  setup  docker  plugin   COPY  mackerel-­‐plugin-­‐docker.rb  /mackerel-­‐plugin-­‐docker.rb   RUN  echo  [plugin.metrics.docker]  \      >>  /etc/mackerel-­‐agent/mackerel-­‐agent.conf   RUN  echo  command  =  \"ruby  /mackerel-­‐plugin-­‐docker.rb\"  \      >>  /etc/mackerel-­‐agent/mackerel-­‐agent.conf   ! #  boot  mackerel-­‐agent   CMD  /startup.sh
32. ֤ίϯςφͷ৘ใΛऩू )PTU qVFOUE NBDLFSFM
    BHFOU "QQ
33. ༷ࢠ(ίϯςφຖͷCPU)
34. ༷ࢠ(ίϯςφຖͷϝϞϦ)
35. ༷ࢠ(·ͱΊͯ)
36. ίϯςφͷத਎ͷ ৘ใΛऩू͍ͨ͠
37. ίϯςφͷத਎ͷ৘ใΛऩू )PTU NBDLFSFM
    BHFOU "QQ
38. Memcachedͷྫ %  docker  run  -­‐d  -­‐P  \        -­‐-­‐name  memcached  -­‐p  11211:11211  \      sylvainlasnier/memcached )PTU NBDLFSFM
    BHFOU NFNDBDIFE
39. linkΦϓγϣϯͰ઀ଓ %  docker  run  -­‐i  -­‐t  -­‐h  `hostname`  \      -­‐v  /var/run/docker.sock:/var/run/docker.sock  \      -­‐v  /proc/mounts:/host/proc/mounts:ro  \      -­‐v  /sys/fs/cgroup/:/host/sys/fs/cgroup:ro  \      -­‐e  'apikey=<APIKEY>'  -­‐-­‐link  memcached:memcached  \      mackerel-­‐agent  /bin/bash   ! root@dev:/#  env   HOSTNAME=develop04.host.h   MEMCACHED_PORT_11211_TCP_PORT=11211   MEMCACHED_PORT_11211_TCP_PROTO=tcp   MEMCACHED_NAME=/tender_curie/memcached   MEMCACHED_PORT=tcp://172.17.0.88:11211   MEMCACHED_PORT_11211_TCP_ADDR=172.17.0.88   MEMCACHED_PORT_11211_TCP=tcp://172.17.0.88:11211
40. ؀ڥม਺ͰΞυϨεࢦఆ root@dev:/#  /usr/local/bin/mackerel-­‐plugin-­‐memcached  \      -­‐host=$MEMCACHED_PORT_11211_TCP_ADDR   memcached.connections.curr_connections    10            1427507503   memcached.cmd.cmd_get      0              1427507503   memcached.cmd.cmd_set      0              1427507503
41. ϓϥάΠϯઃఆΛ࢓ࠐΉ %  docker  run  -­‐h  `hostname`  \      -­‐v  /var/run/docker.sock:/var/run/docker.sock  \      -­‐v  /var/lib/mackerel-­‐agent/:/var/lib/mackerel-­‐agent/  \      -­‐v  /proc/mounts:/host/proc/mounts:ro  \      -­‐v  /sys/fs/cgroup/:/host/sys/fs/cgroup:ro        -­‐e  'apikey=<APIKEY>‘  \      -­‐-­‐link  memcached:memcached  \      -­‐v  /etc/mackerel-­‐agent/conf.d:/etc/mackerel-­‐agent/conf.d:ro      -­‐e  ‘include=/etc/mackerel-­‐agent/conf.d/*'  \      mackerel/mackerel-­‐agent %  cat  /etc/mackerel-­‐agent/conf.d/memcached.conf   [plugin.metrics.memcached]   command  =  "/usr/local/bin/mackerel-­‐plugin-­‐memcached  -­‐ host=$MEMCACHED_PORT_11211_TCP_ADDR"
42. MemcachedͷϝτϦοΫ
43. ·ͱΊ • AgentΛίϯςφͰཱͯΔͱ؆୯ • ॏ͍ίϯςφ͕͙͢ʹൃݟͰ͖Δ • ֤ίϯςφͷத਎΋ݟΕΔ
44. Q & A