Good evening (at the time I’m writing this article)! Haven’t come back into this blog for long time. I guess this is not a very popular blog. BUT if you happen to be one of the visitor who come across this article. Please drop a comment if you have any suggestion or question about the article you are reading. Or it could be just a chat with me :)
Tonight we are going to go through some necessary steps to install dnsmasq
What is dnsmasq? and why?
you can skip this part if you know what it is
It is a software that provide functionality of DNS and DHCP without complex setup procedure and configuration. This software is great tools for DevOps and Web Developer to easily setup test/dev environment for themselves or testing team.
NOTE: This tool is great for test/dev, but not for production enviroment.
If you are looking for software to use in production, please take a look at:
- DNS: BIND
- DHCP: it is built-in to many linux distro. I’m not going to go through that in this post, but if you want more information. Please comment below.
- Like to use command line
- Homebrew - best package manager for Mac OS X (It should be trivial to install, follow the instruction on their homepage.)
PS: Developer of Homebrew (@mxcl) posted this on Twitter Google: 90% of our engineers use the software you wrote (Homebre…
Install dnsmasq with Homebrew:
brew install dnsmasq
As instructed after this commmand finish
# Copy example config and becareful this will override config of dnsmasq if you did install it before cp /usr/local/opt/dnsmasq/dnsmasq.conf.example /usr/local/etc/dnsmasq.conf # Copy the .plist file to Mac OS X On-boot launch directory sudo cp -fv /usr/local/opt/dnsmasq/*.plist /Library/LaunchDaemons sudo chown root /Library/LaunchDaemons/homebrew.mxcl.dnsmasq.plist
There are many options available in dnsmasq. I’m not going through every single of it for now. I will just show you what is the most basic setup to use DNS functionality.
/usr/local/etc/dnsmasq.conf with you favorite editor
Add the following,
This will force dnsmasq to run as root user. It’s because it needs to bind to a privileged port 1~1024 used by DNS protocol (port: 53). If you want to know what privileged port is, go here
Then add a new address record
There is another line that you would like to add is extra
It is a file that define which DNS server your machine is using. By default, dnsmasq will use resolv.conf at path
/etc/resolv.conf. However, this conf file is also managed by Mac OS. This means if dnsmasq is using what Mac OS X resolv is using. Then it will try to resolve external DNS record from itself. So we would like to create one here
sudo touch /etc/resolv-dnsmasq.conf
Edit this file and add the follow line
# This is Google public DNS server, or it could be your own DNS server nameserver 22.214.171.124
Finally, here is the complete dnsmasq.conf
user=root group=wheel address=/project-jamtube.local/127.0.0.1 resolv-file=/etc/resolv-dnsmasq.conf
Start it up !
On Mac OS, most of the daeman are managed by launchctl. It’s a tool that take care of the startup process of a daemon. Inorder to:
Start the daemon
sudo launchctl load /Library/LaunchDaemons/homebrew.mxcl.dnsmasq.plist
sudo launchctl unload /Library/LaunchDaemons/homebrew.mxcl.dnsmasq.plist
You would like to have some alias setup to reload after you change the config. Edit your ~/.bash_profile
alias reload-dnsmasq="sudo launchctl unload /Library/LaunchDaemons/homebrew.mxcl.dnsmasq.plist && sudo launchctl load /Library/LaunchDaemons/homebrew.mxcl.dnsmasq.plist"
At last, point DNS server to dnsmasq
Go to Network preference:
Change DNS to your local ip
I use it daily !
This tool I use it every day for development and also use to setup testing for other users. It’s easy to setup and configure. You should give it a try !Comments