get_host
get_host is an DNS cache with HTTP REST API that enables easy lookups against part of hostname.
The primary goal, why I have written it, is to enable tab completion for ssh to hosts. This includes hosts that not yet have been connected to (In other words, hosts that is not saved in ~/.ssh/known_hosts).
Installation
go get -u github.com/spetzreborn/get_host
Use the normal go-toolchain to build the server
cd get_host/cmd/server
go build
Edit example.toml, current implementation requires permission to to an AXFR (DNS Zone transfer) from the DNS-server. Future version might have support for AXFR with TSIG and/or IXFR
Starting server
./server -configfile example.toml
Usage
Verify and status
To verify that the server works:
curl -s localhost:8080/hosts/KEYWORD
To get information on server uptime, number of elements in cache, cache age and serial of SOA:
curl -s localhost:8080/status
Use HTTP REST API
curl -s localhost:8080/hosts/partOfName
Results in:
["partofname-server.example.tld", "partofname2-server.example.tld", "server-partofname.example.tld"]Use client (preferred)
This repository also includes an client that
- First tries to connect to the configured server
- If that don't work it tries to do an AXFR and match the KEYWORD itself
Make ssh and tab completion work
Alias of ssh
It is strongly recommended not to make an alias that overwrites ssh(1), but instead make an new alias or function that is used for sshing instead. This is because if there is an bug or failure in this program or function there is always the possibility to fall back to "native" ssh(1)
Example of an bash function that handle ssh login and is suitable for tab completion function.sh
Bash completion
To make the function in function.sh work with host completion it needs to be configured with bash completion. Example of an bash function in get_host-completion.bash
Source the completion file
Make sure that the bash get_host-completion.bash is sourced in .bashrc
. ~/get_host-completion.bash