{"id":38840,"date":"2019-10-31T22:26:17","date_gmt":"2019-10-31T19:26:17","guid":{"rendered":"https:\/\/prohoster.info\/blog\/svoj-dynamic-dns-s-pomoshhyu-cloudflare\/"},"modified":"2019-10-31T22:26:17","modified_gmt":"2019-10-31T19:26:17","slug":"svoj-dynamic-dns-s-pomoshhyu-cloudflare","status":"publish","type":"post","link":"https:\/\/prohoster.info\/cs\/blog\/administrirovanie\/svoj-dynamic-dns-s-pomoshhyu-cloudflare","title":{"rendered":"Vlastn\u00ed dynamic DNS s pomoc\u00ed CloudFlare","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

\u00davod<\/h3>\n

\n\"Vlastn\u00ed Pro osobn\u00ed pot\u0159eby jsem na doma spustil VSphere, na kter\u00e9m provozuji virtu\u00e1ln\u00ed router a server Ubuntu jako medi\u00e1ln\u00ed server a spoustu dal\u0161\u00edch u\u017eite\u010dn\u00fdch aplikac\u00ed, a tento server mus\u00ed b\u00fdt dostupn\u00fd z Internetu. Probl\u00e9m v\u0161ak je, \u017ee m\u016fj poskytovatel nab\u00edz\u00ed statickou IP za pen\u00edze, kter\u00e9 by se daly l\u00e9pe vyu\u017e\u00edt. Proto jsem pou\u017e\u00edval kombinaci ddclient + cloudflare. <\/p>\n

V\u0161echno fungovalo dob\u0159e, dokud ddclient p\u0159estal pracovat. Po mal\u00e9m hrab\u00e1n\u00ed jsem pochopil, \u017ee nastal \u010das na improvizaci, proto\u017ee hled\u00e1n\u00ed probl\u00e9mu zabralo p\u0159\u00edli\u0161 mnoho \u010dasu. Nakonec to vy\u00fastilo v mal\u00e9ho d\u00e9mona, kter\u00fd jednodu\u0161e funguje, a to mi sta\u010d\u00ed.
\nKdo m\u00e1 z\u00e1jem \u2013 v\u00edtejte pod kat.
\n<\/a><\/noindex><\/p>\n

Pou\u017e\u00edvan\u00e9 n\u00e1stroje a jak to funguje<\/h3>\n

\nNejprve jsem se dozv\u011bd\u011bl na str\u00e1nk\u00e1ch cloudflare v\u0161e pot\u0159ebn\u00e9 o API<\/a><\/noindex>. A u\u017e jsem se chystal implementovat v\u0161echno v Pythonu (po sezn\u00e1men\u00ed s Pythonem ho \u010d\u00edm d\u00e1l v\u00edce pou\u017e\u00edv\u00e1m pro n\u011bjak\u00e9 jednoduch\u00e9 \u00fakoly nebo kdy\u017e pot\u0159ebuji rychle vytvo\u0159it prototyp), kdy\u017e jsem n\u00e1hle narazil na prakticky hotovou implementaci.
\nZ\u00e1kladem se stal wrapper python-cloudflare<\/a><\/noindex>.<\/p>\n

Vzali jsme jeden z p\u0159\u00edklad\u016f pro aktualizaci DNS a p\u0159idali pou\u017eit\u00ed konfigura\u010dn\u00edho souboru a mo\u017enost aktualizovat v\u00edce A z\u00e1znam\u016f v r\u00e1mci z\u00f3ny a samoz\u0159ejm\u011b neomezen\u00e9 mno\u017estv\u00ed z\u00f3n.<\/p>\n

Logika je n\u00e1sleduj\u00edc\u00ed:<\/p>\n

    \n
  1. Skript z\u00edsk\u00e1 ze souboru s konfigurac\u00ed seznam z\u00f3n a proch\u00e1z\u00ed je v cyklu<\/li>\n
  2. V ka\u017ed\u00e9 z\u00f3n\u011b skript proch\u00e1z\u00ed v cyklu ka\u017edou DNS z\u00e1znam typu A nebo AAAA a porovn\u00e1 ve\u0159ejnou IP s z\u00e1znamem<\/li>\n
  3. Pokud se IP li\u0161\u00ed \u2013 zm\u011bn\u00ed ji, pokud ne, p\u0159esko\u010d\u00ed iteraci cyklu a p\u0159ejde k n\u00e1sleduj\u00edc\u00ed. <\/li>\n
  4. Usne na \u010das uveden\u00fd v konfiguraci.<\/li>\n<\/ol>\n

    <\/p>\n

    Instalace a konfigurace<\/h3>\n

    \nAsi by bylo mo\u017en\u00e9 vytvo\u0159it i .deb bal\u00ed\u010dek, ale nejsem v tom siln\u00fd, a nen\u00ed to tak slo\u017eit\u00e9.
    \nCel\u00fd proces jsem podrobn\u011b popsal v README.md na     str\u00e1nce repozit\u00e1\u0159e<\/a><\/noindex>.<\/p>\n

    Ale pro jistotu to shrnu v ru\u0161tin\u011b:<\/p>\n

      \n
    1. Ujist\u011bte se, \u017ee m\u00e1te nainstalov\u00e1n python3 a python3-pip, pokud ne \u2013 nainstalujte je (v syst\u00e9mu Windows se python3-pip instaluje spole\u010dn\u011b s Pythonem).<\/li>\n
    2. Naklonujte nebo st\u00e1hn\u011bte repozit\u00e1\u0159.<\/li>\n
    3. Nainstalujte pot\u0159ebn\u00e9 z\u00e1vislosti.\n
      python3 -m pip install -r requirements.txt<\/code><\/pre>\n
      \n<\/li>\n
    4. Spus\u0165te instala\u010dn\u00ed skript.
      \nPro Linux:<\/p>\n
      chmod +x install.sh\nsudo .\/install.sh<\/code><\/pre>\n
      \nPro Windows: windows_install.bat\n<\/li>\n
    5. Upravte konfigura\u010dn\u00ed soubor.
      \nPro Linux:<\/p>\n
      sudoedit \/etc\/zen-cf-ddns.conf<\/code><\/pre>\n
      \nPro Windows:<\/p>\n
      Otev\u0159ete soubor zen-cf-ddns.conf ve slo\u017ece, kam jste skript nainstalovali.<\/p>\n
      To je oby\u010dejn\u00fd JSON soubor, nastaven\u00ed nen\u00ed slo\u017eit\u00e9 \u2013 speci\u00e1ln\u011b jsem popsal dv\u011b r\u016fzn\u00e9 z\u00f3ny jako p\u0159\u00edklad.\n<\/li>\n<\/ol>\n
      <\/p>\n
      Co se skr\u00fdv\u00e1 za instal\u00e1tory?<\/h4>\n
      \ninstall.sh pro Linux:<\/p>\n
        \n
      1. Vytv\u00e1\u0159\u00ed se u\u017eivatel pro spu\u0161t\u011bn\u00ed d\u00e9monu, bez vytvo\u0159en\u00ed domovsk\u00e9ho adres\u00e1\u0159e a mo\u017enosti p\u0159ihl\u00e1\u0161en\u00ed.\n
        sudo useradd -r -s \/bin\/false zen-cf-ddns<\/code><\/pre>\n
        \n<\/li>\n
      2. Vytv\u00e1\u0159\u00ed se soubor pro z\u00e1pis logu do \/var\/log\/<\/li>\n
      3. D\u011bl\u00e1me vlastn\u00edkem souboru logu ned\u00e1vno vytvo\u0159en\u00e9ho u\u017eivatele<\/li>\n
      4. Souborov\u00e9 um\u00edst\u011bn\u00ed se kop\u00edruj\u00ed na spr\u00e1vn\u00e1 m\u00edsta (konfigura\u010dn\u00ed soubor do \/etc, spustiteln\u00fd soubor do \/usr\/bin, soubor slu\u017eby do \/lib\/systemd\/system)<\/li>\n
      5. Slu\u017eba se aktivuje<\/li>\n<\/ol>\n
        \nwindows_install.bat pro Windows:<\/p>\n
          \n
        1. Kop\u00edruje spustiteln\u00fd soubor a konfigura\u010dn\u00ed soubor do u\u017eivatelsk\u00e9ho zvolen\u00e9ho adres\u00e1\u0159e<\/li>\n
        2. Vytv\u00e1\u0159\u00ed \u00falohu v pl\u00e1nova\u010di pro spu\u0161t\u011bn\u00ed skriptu p\u0159i startu syst\u00e9mu
          \nschtasks \/create \/tn \"CloudFlare Update IP\" \/tr \"%newLocation%\" \/sc onstart<\/code>\n<\/li>\n<\/ol>\n
          \nPo zm\u011bn\u011b konfigurace je pot\u0159eba skript restartovat, v Linuxu to je jednoduch\u00e9 a obvykl\u00e9:<\/p>\n
          sudo service zen-cf-ddns start\nsudo service zen-cf-ddns stop\nsudo service zen-cf-ddns restart\nsudo service zen-cf-ddns status\n<\/code><\/pre>\n
          \npro Windows bude pot\u0159eba zab\u00edt proces pythonw a skript znovu spustit (moc se mi nechce ps\u00e1t slu\u017ebu pro Windows v C#):<\/p>\n
          taskkill \/im pythonw.exe<\/code><\/pre>\n
          \nT\u00edmto je instalace a nastaven\u00ed hotov\u00e9, pou\u017e\u00edvejte na zdrav\u00ed.<\/p>\n
          Pro ty, kte\u0159\u00ed cht\u011bj\u00ed vid\u011bt ne moc hezk\u00fd k\u00f3d Pythonu, tady je repozit\u00e1\u0159 na GitHubu<\/a><\/noindex>.<\/p>\n
          Licen\u010dn\u00ed smlouva MIT, tak\u017ee s t\u00edmto k\u00f3dem d\u011blejte, co chcete.<\/p>\n
          P.S.: Ch\u00e1pu, \u017ee to dopadlo trochu kostrbat\u011b, ale pln\u00ed sv\u016fj \u00fakol na jedni\u010dku.<\/p>\n
          UPD: 11.10.2019 17:37
          \nNa\u0161el jsem je\u0161t\u011b jeden probl\u00e9m, a pokud by n\u011bkdo mohl poradit, jak ho vy\u0159e\u0161it \u2014 budu velmi vd\u011b\u010dn\u00fd.
          \nProbl\u00e9m je v tom, \u017ee pokud nainstalujete z\u00e1vislosti bez sudo python -m pip install -r …, moduly nebudou u\u017eivateli slu\u017eby viditeln\u00e9, a necht\u011bl bych nutit u\u017eivatele instalovat moduly pod sudo, nav\u00edc je to nep\u0159esn\u00e9.
          \nJak to ud\u011blat spr\u00e1vn\u011b, aby to vypadalo dob\u0159e?
          \nUPD: 11.10.2019 19:16 Probl\u00e9m byl vy\u0159e\u0161en pou\u017eit\u00edm venv.
          \nVy\u0161lo n\u011bkolik zm\u011bn. Nov\u00e1 verze bude brzy.
          \n
          Zdroj:           habr.com<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"
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[…]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":1,"featured_media":29132,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[688],"tags":[],"class_list":["post-38840","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-administrirovanie"],"aioseo_notices":[],"aioseo_head":"\n\t\t\n\t\n\t\n\t\n\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\n","aioseo_head_json":{"title":"\ud83e\udd47Sv\u00e9 vlastn\u00ed dynamick\u00e9 DNS pomoc\u00ed CloudFlare | ProHoster","description":"P\u0159edmluva Pro osobn\u00ed pot\u0159eby jsem si doma 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