How do I change the order in which systemd services are started up












1














Ubuntu 18.04 server on my home network

I'm running:




  • dnsmasq for DHCP and DNS

  • nginx as a reverse proxy to some web applications (running on localhost and on other hosts)


The nginx reverse proxy config uses hostnames, eg:



location / {
proxy_pass http://nas.mydomain.com:8080;


However, when rebooting the server, nginx tries to start up but fails due to not being able to resolve the hostnames in its config. If I start nginx up manually after boot, it starts up without error.



This leads me to believe that nginx is starting before dnsmasq is available to resolve the hostnames.



Is there a way to force nginx to start after dnsmasq?










share|improve this question



























    1














    Ubuntu 18.04 server on my home network

    I'm running:




    • dnsmasq for DHCP and DNS

    • nginx as a reverse proxy to some web applications (running on localhost and on other hosts)


    The nginx reverse proxy config uses hostnames, eg:



    location / {
    proxy_pass http://nas.mydomain.com:8080;


    However, when rebooting the server, nginx tries to start up but fails due to not being able to resolve the hostnames in its config. If I start nginx up manually after boot, it starts up without error.



    This leads me to believe that nginx is starting before dnsmasq is available to resolve the hostnames.



    Is there a way to force nginx to start after dnsmasq?










    share|improve this question

























      1












      1








      1







      Ubuntu 18.04 server on my home network

      I'm running:




      • dnsmasq for DHCP and DNS

      • nginx as a reverse proxy to some web applications (running on localhost and on other hosts)


      The nginx reverse proxy config uses hostnames, eg:



      location / {
      proxy_pass http://nas.mydomain.com:8080;


      However, when rebooting the server, nginx tries to start up but fails due to not being able to resolve the hostnames in its config. If I start nginx up manually after boot, it starts up without error.



      This leads me to believe that nginx is starting before dnsmasq is available to resolve the hostnames.



      Is there a way to force nginx to start after dnsmasq?










      share|improve this question













      Ubuntu 18.04 server on my home network

      I'm running:




      • dnsmasq for DHCP and DNS

      • nginx as a reverse proxy to some web applications (running on localhost and on other hosts)


      The nginx reverse proxy config uses hostnames, eg:



      location / {
      proxy_pass http://nas.mydomain.com:8080;


      However, when rebooting the server, nginx tries to start up but fails due to not being able to resolve the hostnames in its config. If I start nginx up manually after boot, it starts up without error.



      This leads me to believe that nginx is starting before dnsmasq is available to resolve the hostnames.



      Is there a way to force nginx to start after dnsmasq?







      server systemd nginx dnsmasq






      share|improve this question













      share|improve this question











      share|improve this question




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      asked Nov 29 at 12:50









      J. le Roux

      82




      82






















          1 Answer
          1






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          oldest

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          0














          Systemd tries to start multiple services in parallel, unless you tell it not do. If you have dependencies, you need to use directives like After in the services definition file.



          In this case, if you need to start the nginx service after the dnsmasq service is running, you can add



          After=dnsmasq.service


          into the nginx.service file.



          Hope this helps.






          share|improve this answer





















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            1 Answer
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            active

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            active

            oldest

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            0














            Systemd tries to start multiple services in parallel, unless you tell it not do. If you have dependencies, you need to use directives like After in the services definition file.



            In this case, if you need to start the nginx service after the dnsmasq service is running, you can add



            After=dnsmasq.service


            into the nginx.service file.



            Hope this helps.






            share|improve this answer


























              0














              Systemd tries to start multiple services in parallel, unless you tell it not do. If you have dependencies, you need to use directives like After in the services definition file.



              In this case, if you need to start the nginx service after the dnsmasq service is running, you can add



              After=dnsmasq.service


              into the nginx.service file.



              Hope this helps.






              share|improve this answer
























                0












                0








                0






                Systemd tries to start multiple services in parallel, unless you tell it not do. If you have dependencies, you need to use directives like After in the services definition file.



                In this case, if you need to start the nginx service after the dnsmasq service is running, you can add



                After=dnsmasq.service


                into the nginx.service file.



                Hope this helps.






                share|improve this answer












                Systemd tries to start multiple services in parallel, unless you tell it not do. If you have dependencies, you need to use directives like After in the services definition file.



                In this case, if you need to start the nginx service after the dnsmasq service is running, you can add



                After=dnsmasq.service


                into the nginx.service file.



                Hope this helps.







                share|improve this answer












                share|improve this answer



                share|improve this answer










                answered Nov 29 at 13:36









                Lewis M

                5205




                5205






























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