Start running your own DNS server
A common problem in web development is simulating the final environment and, specifically, running your apps in their own private domain.
One solution is editing the
/etc/hosts every time you need to add a new domain, but this can quickly become a very tedious process.
If you work on OS X, you probably have heard of Pow, but if you only need the domain resolution and don’t use Rails, it is probaly overkill to install a full featured application server just to create some dev domain. MAMP Pro offers domain resolution too, but it’s not free.
There is, however, another solution: running your own instance of a DNS server.
What you need it’s a copy of dnsmasq and stop worrying and love the shell..
First of all install dnsmasq and put it in autostart
brew install dnsmasq sudo cp -v $(brew --prefix dnsmasq)/*.plist /Library/LaunchDaemons
Configure the dns intance
cat <<- EOF > $(brew --prefix)/etc/dnsmasq.conf # IPV4 address=/dev/127.0.0.1 # IPV6, otherwise virtual hosts in Maverick won't work address=/dev/::1 listen-address=127.0.0.1 EOF
Then we configure the resolvers for all domains and create the one for the
sudo mkdir -p /etc/resolver # .dev domains sudo bash -c 'echo "nameserver 127.0.0.1" > /etc/resolver/dev' # universal catcher sudo bash -c 'echo "nameserver 127.0.0.1" > /etc/resolver/catchall' sudo bash -c 'echo "domain ." >> /etc/resolver/catchall'
Set localhost as main DNS server, unfortunately you can’t automatically prepend localhost to the list of DNSs your DHCP assigned to you.
You have to change it manually and put 127.0.0.1 on top of the list.
networksetup -setdnsservers Ethernet 127.0.0.1 networksetup -setdnsservers Wi-Fi 127.0.0.1
If everything’s ok, running
scutil --dns should return something like this
resolver #8 domain : dev nameserver : 127.0.0.1 flags : Request A records, Request AAAA records reach : Reachable,Local Address
Now you can start dnsmasq
# start dnsmasq sudo launchctl -w load /Library/LaunchDaemons/homebrew.mxcl.dnsmasq.plist # make some tests $ ping -c 1 anyhostname.dev PING anyhostname.dev (127.0.0.1): 56 data bytes 64 bytes from 127.0.0.1: icmp_seq=0 ttl=64 time=0.058 ms $ dig anyhostname.dev ;; ANSWER SECTION: anyhostname.dev. 0 IN A 127.0.0.1 ;; Query time: 3 msec ;; SERVER: 127.0.0.1#53(127.0.0.1) $ dig google-public-dns-a.google.com @127.0.0.1 ;; ANSWER SECTION: google-public-dns-a.google.com. 25451 IN A 188.8.131.52 ;; Query time: 30 msec ;; SERVER: 127.0.0.1#53(127.0.0.1) # cache will speedup subsequent DNS queries $ dig google-public-dns-a.google.com @127.0.0.1 ;; Query time: 0 msec
Bonus: if you run Apache on your dev machine, you can easily setup the one virtual host to rule them all through mass virtual hosting.
/etc/apache2/extra/httpd-vhosts.conf and add this configuration, every
.dev domain will point to a folder with the same name, but without the extension, in
myapp.dev will point to
<VirtualHost *:80> ServerAdmin you@localhost ServerName anyhostname.dev ServerAlias *.dev UseCanonicalName Off # %1.0 is the domain without the extension, in this case # everything before .dev # more info: http://httpd.apache.org/docs/2.4/mod/mod_vhost_alias.html VirtualDocumentRoot /Users/[your_login]/Sites/%1.0 ErrorLog "/var/log/apache2/dev_hosts_error_log" CustomLog "/var/log/apache2/dev_hosts_access_log" common <Directory /Users/[your_login]/Sites/*> AllowOverride All </Directory> </VirtualHost>
You can finally reload Apache configuration with
sudo apachectl graceful.