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dnsmasq

We use dnsmasq as a lightweight DNS server for discovery of fixed services within our infrastructure. e.g. Eureka

Provided here is a minimal docker image designed to configure itself from a mapped directory of .conf files.

How to use

Starting a container from this image is simple. We run it directly on the host's network stack so the host can act as a DNS for other services in the network.

docker run --name dnsmasq --cap-add=NET_ADMIN --net=host -v /etc/dnsmasq:/etc/dnsmasq storytel/dnsmasq

We can then add multiple .conf files to the /etc/dnsmasq folder to provide layered configuration. This layering is useful to allow multiple services to add their own configuration files.

# 0.base.conf

domain-needed
bogus-priv
no-hosts
keep-in-foreground
no-resolv
expand-hosts
server=8.8.8.8
server=8.8.4.4
# 1.eureka.conf
address=/001.eureka.storytel/10.10.10.21
address=/002.eureka.storytel/10.10.10.22
address=/003.eureka.storytel/10.10.10.23
txt-record=txt.global.eureka.storytel,sweden.eureka.storytel
txt-record=txt.sweden.eureka.storytel,10.10.10.21,10.10.10.22,10.10.10.23
# 2.etcd.conf
address=/001.etcd.storytel/10.10.10.21
address=/002.etcd.storytel/10.10.10.22
address=/003.etcd.storytel/10.10.10.23

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A docker image for dnsmasq

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