Welcome to the designate-agent, rewritten in Go.
When you install go you'll want to make your tree look like:
GOPATH=/home/tim/code/golang
$ (/home/tim/code/golang) tree .
.
├── bin
├── pkg
└── src
└── github.com
└── rackerlabs
└── slappy
slappy uses glide to manage
dependencies. If you've got that installed, you can run
make dependencies to install a couple things into a vendor dir.
make build will do it if you have Go installed. If you have docker, you
can build with make docker-build and use that instead.
There's a lot of config toggles that slappy understands:
$ slappy --help
-all_tcp
sends all queries over tcp (default true)
-allowUnknownFlags
Don't terminate the app if ini file contains unknown flags.
-allow_notify string
comma-separated list of IPs allowed to query slappy
-bind_address string
IP to listen on
-bind_port string
port to listen on (default "5358")
-config string
Path to ini config for using in go flags. May be relative to the current executable path.
-configUpdateInterval duration
Update interval for re-reading config file set via -config flag. Zero disables config file re-reading.
-debug
enables debug mode
-dumpflags
Dumps values for all flags defined in the app into stdout in ini-compatible syntax and terminates the app.
-limit_rndc
enables limiting concurrent rndc calls with rndc_timeout, rndc_limit
-log string
file for the log, if empty will log only to stdout
-master string
master to zone transfer from
-queries string
nameserver to query to grok zone state
-query_timeout int
seconds before output dns queries timeout from slappy (default 10)
-rndc_limit int
number of concurrent rndc calls allowed if limit_rndc=true (default 50)
-rndc_timeout int
seconds before waiting rndc call will abort (default 25)
-stats_uri string
hostname to dig for to get stats, should be an invalid dns name! (default "/stats.")
-status_file string
path to write a status file, empty means no status file
-status_interval int
seconds to wait between status file writes (default 60)
-transfer_source string
source IP for zone transfers
-use_syslog
log only to syslog
-version
prints version information
-zone_path string
path to write zone filesThese values can be specified in a config file that's passed to slappy
at runtime via slappy --config slappy.conf.
$ cat slappy.conf
[slappy]
debug = true
zone_path = /var/cache/bind
log = slappy.log
all_tcp = true
limit_rndc=true
rndc_limit=1
rndc_timeout=1slappy keeps various stats internally while it runs. If it's restarted, the stats are reset.
You can view the running tally of stats by doing a dig @slappyip /stats.
$ dig @slappyip -p 5358 /stats +short
"uptime: 6650360"
"goroutines: 48"
"memory: 1.113mb"
"nextGC: 4.194mb"
"queries: 3383234"
"addzones: 708573"
"reloads: 456498"
"delzones: 251396"
"rndc_attempts: 1416474"
"rndc_success: 1416467"
Metrics are mostly self explanatory:
| metric | explanation |
|---|---|
| uptime | seconds since slappy was started |
| goroutines | current # of goroutines |
| memory | current mb of memory usage |
| nextGC | memory(mb) usage when next garbage collection will occur |
| queries | the total number of dns queries slappy has processed |
| addzones | the total number of rndc addzones slappy has done |
| reloads | the total number of rndc reloads slappy has done |
| delzones | the total number of rndc delzones slappy has done |
| rndc_attempts | the total number of rndc calls slappy has attempted |
| rndc_success | the total number of rndc calls slappy has completed |