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diff --git a/docs/Running-behind-apache.md b/docs/Running-behind-apache.md new file mode 100644 index 00000000..7838665c --- /dev/null +++ b/docs/Running-behind-apache.md @@ -0,0 +1,270 @@ +# Netdata via apache's mod_proxy + +Below you can find instructions for configuring an apache server to: + +1. proxy a single netdata via an HTTP and HTTPS virtual host +2. dynamically proxy any number of netdata +3. add user authentication +4. adjust netdata settings to get optimal results + + +## Requirements + +Make sure your apache has installed `mod_proxy` and `mod_proxy_http`. + +On debian/ubuntu systems, install them with this: + +```sh +sudo apt-get install libapache2-mod-proxy-html +``` + +Also make sure they are enabled: + +``` +sudo a2enmod proxy +sudo a2enmod proxy_http +``` + +Ensure your rewrite module is enabled: + +``` +sudo a2enmod rewrite +``` + +--- + +## netdata on an existing virtual host + +On any **existing** and already **working** apache virtual host, you can redirect requests for URL `/netdata/` to one or more netdata servers. + +### proxy one netdata, running on the same server apache runs + +Add the following on top of any existing virtual host. It will allow you to access netdata as `http://virtual.host/netdata/`. + +``` +<VirtualHost *:80> + + RewriteEngine On + ProxyRequests Off + ProxyPreserveHost On + + <Proxy *> + Require all granted + </Proxy> + + # Local netdata server accessed with '/netdata/', at localhost:19999 + ProxyPass "/netdata/" "http://localhost:19999/" connectiontimeout=5 timeout=30 keepalive=on + ProxyPassReverse "/netdata/" "http://localhost:19999/" + + # if the user did not give the trailing /, add it + # for HTTP (if the virtualhost is HTTP, use this) + RewriteRule ^/netdata$ http://%{HTTP_HOST}/netdata/ [L,R=301] + # for HTTPS (if the virtualhost is HTTPS, use this) + #RewriteRule ^/netdata$ https://%{HTTP_HOST}/netdata/ [L,R=301] + + # rest of virtual host config here + +</VirtualHost> +``` + +### proxy multiple netdata running on multiple servers + +Add the following on top of any existing virtual host. It will allow you to access multiple netdata as `http://virtual.host/netdata/HOSTNAME/`, where `HOSTNAME` is the hostname of any other netdata server you have (to access the `localhost` netdata, use `http://virtual.host/netdata/localhost/`). + +``` +<VirtualHost *:80> + + RewriteEngine On + ProxyRequests Off + ProxyPreserveHost On + + <Proxy *> + Require all granted + </Proxy> + + # proxy any host, on port 19999 + ProxyPassMatch "^/netdata/([A-Za-z0-9\._-]+)/(.*)" "http://$1:19999/$2" connectiontimeout=5 timeout=30 keepalive=on + + # make sure the user did not forget to add a trailing / + # for HTTP (if the virtualhost is HTTP, use this) + RewriteRule "^/netdata/([A-Za-z0-9\._-]+)$" http://%{HTTP_HOST}/netdata/$1/ [L,R=301] + # for HTTPS (if the virtualhost is HTTPS, use this) + RewriteRule "^/netdata/([A-Za-z0-9\._-]+)$" https://%{HTTP_HOST}/netdata/$1/ [L,R=301] + + # rest of virtual host config here + +</VirtualHost> +``` + +> IMPORTANT<br/> +> The above config allows your apache users to connect to port 19999 on any server on your network. + +If you want to control the servers your users can connect to, replace the `ProxyPassMatch` line with the following. This allows only `server1`, `server2`, `server3` and `server4`. + +``` + ProxyPassMatch "^/netdata/(server1|server2|server3|server4)/(.*)" "http://$1:19999/$2" connectiontimeout=5 timeout=30 keepalive=on +``` + +## netdata on a dedicated virtual host + +You can proxy netdata through apache, using a dedicated apache virtual host. + +Create a new apache site: + +```sh +nano /etc/apache2/sites-available/netdata.conf +``` + +with this content: + +``` +<VirtualHost *:80> + RewriteEngine On + ProxyRequests Off + ProxyPreserveHost On + + ServerName netdata.domain.tld + + <Proxy *> + Require all granted + </Proxy> + + ProxyPass "/" "http://localhost:19999/" connectiontimeout=5 timeout=30 keepalive=on + ProxyPassReverse "/" "http://localhost:19999/" + + ErrorLog ${APACHE_LOG_DIR}/netdata-error.log + CustomLog ${APACHE_LOG_DIR}/netdata-access.log combined +</VirtualHost> +``` + +Enable the VirtualHost: + +```sh +sudo a2ensite netdata.conf && service apache2 reload +``` + +## Netdata proxy in Plesk +_Assuming the main goal is to make Netdata running in HTTPS._ +1. Make a subdomain for Netdata on which you enable and force HTTPS - You can use a free Let's Encrypt certificate +2. Go to "Apache & nginx Settings", and in the following section, add: +``` +RewriteEngine on +RewriteRule (.*) http://localhost:19999/$1 [P,L] +``` +3. Optional: If your server is remote, then just replace "localhost" with your actual hostname or IP, it just works. + +Repeat the operation for as many servers as you need. + + +## Enable Basic Auth + +If you wish to add an authentication (user/password) to access your netdata, do these: + +Install the package `apache2-utils`. On debian / ubuntu run `sudo apt-get install apache2-utils`. + +Then, generate password for user `netdata`, using `htpasswd -c /etc/apache2/.htpasswd netdata` + +Modify the virtual host with these: + +``` + # replace the <Proxy *> section + <Proxy *> + Order deny,allow + Allow from all + </Proxy> + + # add a <Location /netdata/> section + <Location /netdata/> + AuthType Basic + AuthName "Protected site" + AuthUserFile /etc/apache2/.htpasswd + Require valid-user + Order deny,allow + Allow from all + </Location> +``` + +Specify `Location /` if netdata is running on dedicated virtual host. + +Note: Changes are applied by reloading or restarting Apache. + +# Netdata configuration + +You might edit `/etc/netdata/netdata.conf` to optimize your setup a bit. For applying these changes you need to restart netdata. + +## Response compression + +If you plan to use netdata exclusively via apache, you can gain some performance by preventing double compression of its output (netdata compresses its response, apache re-compresses it) by editing `/etc/netdata/netdata.conf` and setting: + +``` +[web] + enable gzip compression = no +``` + +Once you disable compression at netdata (and restart it), please verify you receive compressed responses from apache (it is important to receive compressed responses - the charts will be more snappy). + +## Limit direct access to netdata + +You would also need to instruct netdata to listen only on `localhost`, `127.0.0.1` or `::1`. + +``` +[web] + bind to = localhost +``` +or +``` +[web] + bind to = 127.0.0.1 +``` +or +``` +[web] + bind to = ::1 +``` + +--- + +You can also use a unix domain socket. This will also provide a faster route between apache and netdata: + +``` +[web] + bind to = unix:/tmp/netdata.sock +``` +_note: netdata v1.8+ support unix domain sockets_ + +At the apache side, prepend the 2nd argument to `ProxyPass` with `unix:/tmp/netdata.sock|`, like this: + +``` +ProxyPass "/netdata/" "unix:/tmp/netdata.sock|http://localhost:19999/" connectiontimeout=5 timeout=30 keepalive=on +``` + +--- + +If your apache server is not on localhost, you can set: + +``` +[web] + bind to = * + allow connections from = IP_OF_APACHE_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 + +apache 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 +``` + +## Troubleshooting mod_proxy + +Make sure the requests reach netdata, by examing `/var/log/netdata/access.log`. + +1. if the requests do not reach netdata, your apache does not forward them. +2. if the requests reach netdata by the URLs are wrong, you have not re-written them properly. + +[]() |