{"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\/hr\/blog\/administrirovanie\/svoj-dynamic-dns-s-pomoshhyu-cloudflare","title":{"rendered":"Svoj dinami\u010dki DNS pomo\u0107u CloudFlare","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Predgovor<\/h3>\n

\n\"Svoj Postavio sam VSphere za osobne potrebe kod ku\u0107e, na kojem pokre\u0107em virtualni usmjeriva\u010d i Ubuntu server kao medijski server te hrpu drugih sitnica, a taj server trebam u\u010diniti dostupnim s Interneta. Me\u0111utim, problem je u tome \u0161to moj pru\u017eatelj usluga napla\u0107uje stati\u010dnu IP adresu, a novac se uvijek mo\u017ee iskoristiti za korisnije stvari. Stoga sam koristio kombinaciju ddclient + cloudflare. <\/p>\n

Sve je bilo u redu dok ddclient nije prestao raditi. Nakon malo istra\u017eivanja shvatio sam da je do\u0161lo vrijeme za improvizaciju, jer je previ\u0161e vremena prolazilo u pronala\u017eenju problema. Na kraju je sve zavr\u0161ilo u malom demonu koji jednostavno radi, a meni to vi\u0161e i ne treba.
\nKome je zanimljivo \u2013 dobrodo\u0161li ispod koda.
\n<\/a><\/noindex><\/p>\n

Kori\u0161teni alati i kako \u2018to\u2019 radi<\/h3>\n

\nPrvo sam na web stranici cloudflare saznao sve \u0161to trebam znati o API<\/a><\/noindex>. Ve\u0107 sam bila spremna implementirati sve u Pythonu (nakon \u0161to sam se upoznala s Pythonom, sve \u010de\u0161\u0107e ga koristim za jednostavne zadatke ili kada trebam brzo napraviti prototip), kada sam iznenada naletjela na gotovo gotovu implementaciju.
\nUglavnom, kao osnovu sam uzela wrapper python-cloudflare<\/a><\/noindex>.<\/p>\n

Uzela sam jedan od primjera za a\u017euriranje DNS-a i dodala kori\u0161tenje konfiguracijske datoteke i mogu\u0107nost a\u017euriranja vi\u0161e A zapisa unutar zone, a naravno i neograni\u010den broj zona.<\/p>\n

Logika je sljede\u0107a:<\/p>\n

    \n
  1. Skripta dobiva popis zona iz konfiguracijske datoteke i prolazi kroz njih u petlji.<\/li>\n
  2. U svakoj zoni skripta prolazi u petlji kroz svaku DNS A ili AAAA zapis i uspore\u0111uje javni IP s zapisom.<\/li>\n
  3. Ako se IP razlikuje \u2014 mijenja ga, ako se ne razlikuje presko\u010di iteraciju petlje i prelazi na sljede\u0107i. <\/li>\n
  4. Zaspati na vrijeme navedeno u konfiguraciji.<\/li>\n<\/ol>\n

    <\/p>\n

    Instalacija i postavljanje<\/h3>\n

    \nVjerojatno bi bilo mogu\u0107e napraviti i .deb paket, ali nisam stru\u010dna u tome, a i nije sve tako komplicirano.
    \nProces sam op\u0161irno opisala u README.md na     stranici repozitorija.<\/a><\/noindex>.<\/p>\n

    Ali za svaki slu\u010daj \u0107u opisati na hrvatskom op\u0107enitim rije\u010dima:<\/p>\n

      \n
    1. Provjerite imate li instaliran python3 i python3-pip, ako nemate \u2013 instalirajte ih (u Windowsu se python3-pip instalira zajedno s Pythonom).<\/li>\n
    2. Kloni ili preuzmi repozitorij.<\/li>\n
    3. Instalirajte potrebne ovisnosti.\n
      python3 -m pip install -r requirements.txt<\/code><\/pre>\n
      \n<\/li>\n
    4. Pokrenite instalacijski skript.
      \nZa Linux:<\/p>\n
      chmod +x install.sh\nsudo .\/install.sh<\/code><\/pre>\n
      \nZa Windows: windows_install.bat\n<\/li>\n
    5. Uredite datoteku s konfiguracijom.
      \nZa Linux:<\/p>\n
      sudoedit \/etc\/zen-cf-ddns.conf<\/code><\/pre>\n
      \nZa Windows:<\/p>\n
      Otvorite datoteku zen-cf-ddns.conf u mapi gdje ste instalirali skriptu.<\/p>\n
      Ovo je obi\u010dna JSON datoteka, ni\u0161ta komplicirano po postavkama \u2013 posebno sam opisao 2 razli\u010dite zone u njoj kao primjer.\n<\/li>\n<\/ol>\n
      <\/p>\n
      \u0160to se krije iza instalacija?<\/h4>\n
      \ninstall.sh za Linux:<\/p>\n
        \n
      1. Kreira se korisnik za pokretanje demona, bez stvaranja ku\u0107nog direktorija i mogu\u0107nosti prijave.\n
        sudo useradd -r -s \/bin\/false zen-cf-ddns<\/code><\/pre>\n
        \n<\/li>\n
      2. Kreira se datoteka za zapisivanje loga u \/var\/log\/<\/li>\n
      3. Postavljamo vlasnika datoteke loga na nedavno kreiranog korisnika.<\/li>\n
      4. Datoteke se kopiraju na svoja mjesta (konfiguracija u \/etc, izvr\u0161na datoteka u \/usr\/bin, datoteka usluge u \/lib\/systemd\/system)<\/li>\n
      5. Aktivira se usluga.<\/li>\n<\/ol>\n
        \nwindows_install.bat za Windows:<\/p>\n
          \n
        1. Kopira izvr\u0161nu datoteku i datoteku konfiguracije u korisnikom navedenu mapu.<\/li>\n
        2. Stvara se zadatak u planerU za pokretanje skripte prilikom pokretanja sustava.
          \nschtasks \/create \/tn \"CloudFlare Update IP\" \/tr \"%newLocation%\" \/sc onstart<\/code>\n<\/li>\n<\/ol>\n
          \nNakon promjene konfiguracije, skriptu je potrebno ponovno pokrenuti, u Linuxu je to jednostavno i poznato:<\/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
          \nza Windows \u0107e biti potrebno ubiti proces pythonw i ponovno pokrenuti skriptu (vrlo mi se ne da pisati uslugu pod Windows na C#):<\/p>\n
          taskkill \/im pythonw.exe<\/code><\/pre>\n
          \nTime je instalacija i postavka zavr\u0161ena, u\u017eivajte u kori\u0161tenju.<\/p>\n
          Za one koji \u017eele vidjeti ne ba\u0161 lijep kod u Pythonu, evo. repozitorijum na GitHubu<\/a><\/noindex>.<\/p>\n
          MIT licenca, tako da radite s ovim dobrom \u0161to \u017eelite.<\/p>\n
          P.S.: Shva\u0107am da je ispalo malo improvizirano, ali svoj zadatak obavlja sjajno.<\/p>\n
          UPD: 11.10.2019 17:37
          \nProna\u0161ao sam jo\u0161 1 problem, i ako netko mo\u017ee dati savjet kako ga rije\u0161iti \u2013 bio bih vrlo zahvalan.
          \nProblem je u tome \u0161to ako se instaliraju ovisnosti bez sudo python -m pip install -r …, moduli ne\u0107e biti vidljivi korisniku servisa, a ne bih htio prisiljavati korisnike da instaliraju module pod sudo, niti je to ispravno.
          \nKako pravilno napraviti da izgleda lijepo?
          \nUPD: 11.10.2019 19:16 Problem je rije\u0161en kori\u0161tenjem venv.
          \nBilo je nekoliko promjena. Novi release dolazi uskoro.
          \n
          Izvor:           habr.com<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"
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