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diff --git a/docs/Running-behind-nginx.md b/docs/Running-behind-nginx.md new file mode 100644 index 0000000..3918af2 --- /dev/null +++ b/docs/Running-behind-nginx.md @@ -0,0 +1,204 @@ +# Netdata via nginx + +To pass netdata via a nginx, use this: + +### As a virtual host + +``` +upstream backend { + # the netdata server + server 127.0.0.1:19999; + keepalive 64; +} + +server { + # nginx listens to this + listen 80; + + # the virtual host name of this + server_name netdata.example.com; + + location / { + proxy_set_header X-Forwarded-Host $host; + proxy_set_header X-Forwarded-Server $host; + proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for; + proxy_pass http://backend; + proxy_http_version 1.1; + proxy_pass_request_headers on; + proxy_set_header Connection "keep-alive"; + proxy_store off; + } +} +``` + +### As a subfolder to an existing virtual host + +``` +upstream netdata { + server 127.0.0.1:19999; + keepalive 64; +} + +server { + listen 80; + + # the virtual host name of this subfolder should be exposed + #server_name netdata.example.com; + + location = /netdata { + return 301 /netdata/; + } + + location ~ /netdata/(?<ndpath>.*) { + proxy_redirect off; + proxy_set_header Host $host; + + proxy_set_header X-Forwarded-Host $host; + proxy_set_header X-Forwarded-Server $host; + proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for; + proxy_http_version 1.1; + proxy_pass_request_headers on; + proxy_set_header Connection "keep-alive"; + proxy_store off; + proxy_pass http://netdata/$ndpath$is_args$args; + + gzip on; + gzip_proxied any; + gzip_types *; + } +} +``` + +### As a subfolder for multiple netdata servers, via one nginx + +``` +upstream backend-server1 { + server 10.1.1.103:19999; + keepalive 64; +} +upstream backend-server2 { + server 10.1.1.104:19999; + keepalive 64; +} + +server { + listen 80; + + # the virtual host name of this subfolder should be exposed + #server_name netdata.example.com; + + location ~ /netdata/(?<behost>.*)/(?<ndpath>.*) { + proxy_set_header X-Forwarded-Host $host; + proxy_set_header X-Forwarded-Server $host; + proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for; + proxy_http_version 1.1; + proxy_pass_request_headers on; + proxy_set_header Connection "keep-alive"; + proxy_store off; + proxy_pass http://backend-$behost/$ndpath$is_args$args; + + gzip on; + gzip_proxied any; + gzip_types *; + } + + # make sure there is a trailing slash at the browser + # or the URLs will be wrong + location ~ /netdata/(?<behost>.*) { + return 301 /netdata/$behost/; + } +} +``` + +Of course you can add as many backend servers as you like. + +Using the above, you access netdata on the backend servers, like this: + +- `http://nginx.server/netdata/server1/` to reach `backend-server1` +- `http://nginx.server/netdata/server2/` to reach `backend-server2` + + +### Enable authentication + +Create an authentication file to enable the nginx basic authentication. +Do not use authentication without SSL/TLS! +If you haven't one you can do the following: + +``` +printf "yourusername:$(openssl passwd -apr1)" > /etc/nginx/passwords +``` + +And enable the authentication inside your server directive: + +``` +server { + # ... + auth_basic "Protected"; + auth_basic_user_file passwords; + # ... +} +``` + +## limit direct access to netdata + +If your nginx is on `localhost`, you can use this to protect your netdata: + +``` +[web] + bind to = 127.0.0.1 ::1 +``` + +--- + +You can also use a unix domain socket. This will also provide a faster route between nginx and netdata: + +``` +[web] + bind to = unix:/tmp/netdata.sock +``` +_note: netdata v1.8+ support unix domain sockets_ + +At the nginx side, use something like this to use the same unix domain socket: + +``` +upstream backend { + server unix:/tmp/netdata.sock; + keepalive 64; +} +``` + +--- + +If your nginx server is not on localhost, you can set: + +``` +[web] + bind to = * + allow connections from = IP_OF_NGINX_SERVER +``` + +_note: netdata v1.9+ support `allow connections from`_ + +`allow connections from` accepts [netdata simple patterns](../libnetdata/simple_pattern/) to match against the connection IP address. + +## prevent the double access.log + +nginx logs accesses and netdata logs them too. You can prevent netdata from generating its access log, by setting this in `/etc/netdata/netdata.conf`: + +``` +[global] + access log = none +``` + +## SELinux + +If you get an 502 Bad Gateway error you might check your nginx error log: + +```sh +# cat /var/log/nginx/error.log: +2016/09/09 12:34:05 [crit] 5731#5731: *1 connect() to 127.0.0.1:19999 failed (13: Permission denied) while connecting to upstream, client: 1.2.3.4, server: netdata.example.com, request: "GET / HTTP/2.0", upstream: "http://127.0.0.1:19999/", host: "netdata.example.com" +``` + +If you see something like the above, chances are high that SELinux prevents nginx from connecting to the backend server. To fix that, just use this policy: `setsebool -P httpd_can_network_connect true`. + +[]() |