{"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\/no\/blog\/administrirovanie\/svoj-dynamic-dns-s-pomoshhyu-cloudflare","title":{"rendered":"Din dynamiske DNS med CloudFlare","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Forord<\/h3>\n

\n\"Din For personal needs, I set up VSphere at home, where I run a virtual router and an Ubuntu server as a media server along with a bunch of other goodies, and this server needs to be accessible from the Internet. But the problem is that my provider charges for static IPs, which I could always find more useful applications for. So I used the combination of ddclient + cloudflare. <\/p>\n

Everything was fine until ddclient stopped working. After poking around, I realized it was time for hacks and workarounds, as I was spending too much time searching for the problem. In the end, it all turned into a small daemon that just works, and that\u2019s all I needed.
\nFor those interested \u2013 welcome under the cut.
\n<\/a><\/noindex><\/p>\n

Tools used and how \"it\" works<\/h3>\n

\nSo the first thing I did was check the cloudflare site for everything I needed to know about API<\/a><\/noindex>. I had already started to implement everything in Python (after getting acquainted with Python, I increasingly use it for simple tasks or when I need to quickly create a prototype), when suddenly I stumbled upon a nearly complete implementation.
\nOverall, the base was taken from the wrapper python-cloudflare<\/a><\/noindex>.<\/p>\n

I took one of the examples for updating DNS and added support for a configuration file and the ability to update multiple A records within a zone and, of course, an unlimited number of zones.<\/p>\n

The logic is as follows:<\/p>\n

    \n
  1. The script retrieves a list of zones from the configuration file and loops through them<\/li>\n
  2. In each zone, the script loops through each A or AAAA DNS record and checks the Public IP against the record<\/li>\n
  3. If the IP is different \u2014 it changes it; if not, it skips the loop iteration and moves to the next <\/li>\n
  4. Sleeps for the time specified in the config<\/li>\n<\/ol>\n

    <\/p>\n

    Installasjon og konfigurasjon<\/h3>\n

    \nProbably it would be possible to create a .deb package, but I'm not strong in that, and it\u2019s not that complicated anyway.
    \nI described the process quite thoroughly in the README.md on     the repository page<\/a><\/noindex>.<\/p>\n

    But just in case, I will describe it in general terms in Russian:<\/p>\n

      \n
    1. Make sure you have python3 and python3-pip installed; if not \u2013 install them (in Windows, python3-pip is installed with Python)<\/li>\n
    2. Clone or download the repository<\/li>\n
    3. Install the required dependencies.\n
      python3 -m pip install -r requirements.txt<\/code><\/pre>\n
      \n<\/li>\n
    4. Run the installation script
      \nFor Linux:<\/p>\n
      chmod +x install.sh\nsudo .\/install.sh<\/code><\/pre>\n
      \nFor Windows: windows_install.bat\n<\/li>\n
    5. Edit the configuration file
      \nFor Linux:<\/p>\n
      sudoedit \/etc\/zen-cf-ddns.conf<\/code><\/pre>\n
      \nFor Windows:<\/p>\n
      Open the zen-cf-ddns.conf file in the folder where you installed the script.<\/p>\n
      Dette er en vanlig JSON-fil, med enkle innstillinger \u2013 jeg har spesifikt beskrevet to forskjellige soner som eksempel.\n<\/li>\n<\/ol>\n
      <\/p>\n
      Hva skjuler seg bak installat\u00f8rene?<\/h4>\n
      \ninstall.sh for Linux:<\/p>\n
        \n
      1. En bruker opprettes for \u00e5 kj\u00f8re demonen, uten opprettelse av hjemmekatalog og mulighet for innlogging.\n
        sudo useradd -r -s \/bin\/false zen-cf-ddns<\/code><\/pre>\n
        \n<\/li>\n
      2. En fil opprettes for \u00e5 skrive logger til \/var\/log\/<\/li>\n
      3. Vi gj\u00f8r den nylig opprettede brukeren til eier av loggfila<\/li>\n
      4. Filene kopieres til sine plasser (konfigurasjon til \/etc, kj\u00f8rbar fil til \/usr\/bin, tjenestefil til \/lib\/systemd\/system)<\/li>\n
      5. Tjenesten aktiveres<\/li>\n<\/ol>\n
        \nwindows_install.bat for Windows:<\/p>\n
          \n
        1. Kopierer den kj\u00f8rbare filen og konfigurasjonsfilen til den angitte brukermappen<\/li>\n
        2. Oppretter en oppgave i planleggeren for \u00e5 kj\u00f8re skriptet ved systemoppstart
          \nschtasks \/create \/tn \"CloudFlare Update IP\" \/tr \"%newLocation%\" \/sc onstart<\/code>\n<\/li>\n<\/ol>\n
          \nEtter endring av konfigurasjonen m\u00e5 skriptet startes p\u00e5 nytt, i Linux er alt enkelt og kjent:<\/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
          \nfor Windows m\u00e5 prosessen pythonw drepes og skriptet startes p\u00e5 nytt (jeg er veldig lat til \u00e5 skrive en tjeneste for Windows i C#):<\/p>\n
          taskkill \/im pythonw.exe<\/code><\/pre>\n
          \nDermed er installasjonen og konfigurasjonen fullf\u00f8rt, bruk den med glede.<\/p>\n
          For de som \u00f8nsker \u00e5 se ikke den peneste Python-koden, her er den repository p\u00e5 GitHub<\/a><\/noindex>.<\/p>\n
          MIT-lisens, s\u00e5 gj\u00f8r hva du vil med dette.<\/p>\n
          P.S.: Jeg forst\u00e5r at det ble litt kl\u00f8nete, men det l\u00f8ser oppgaven min perfekt.<\/p>\n
          UPD: 11.10.2019 17:37
          \nJeg har funnet ett problem til, og om noen kan foresl\u00e5 hvordan det kan l\u00f8ses \u2013 vil jeg v\u00e6re sv\u00e6rt takknemlig.
          \nProblemet er at hvis man installerer avhengigheter uten sudo python -m pip install -r …, s\u00e5 vil ikke modulene v\u00e6re synlige for tjeneste-brukeren, og jeg \u00f8nsker ikke \u00e5 tvinge brukerne til \u00e5 installere moduler med sudo, det er heller ikke riktig.
          \nHvordan kan man gj\u00f8re det riktig, slik at det er pent?
          \nUPD: 11.10.2019 19:16 Problemet er l\u00f8st ved bruk av venv.
          \nDet ble gjort flere endringer. En ny utgivelse vil komme om dager.
          \n
          Kilde:           habr.com<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"
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