01 / public edgeVIP
The address stays put.
Clients keep one destination while ownership moves underneath.
High availability without the high drama
Fail over
without falling over.
Service-aware failover, elasticd is an HA daemon designed to move a VIP between eligible Linux nodes using fresh service-health evidence and explicit ownership.
vip/web · ownership playgroundlive state
edge-1owner · healthy
edge-2standby · healthy
edge-3standby · healthy
12:04:29 quorum healthy · 3 voters
12:04:30 edge-1 holds authority for vip/web
12:04:30 ● route published · 203.0.113.20/32
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A small, stubborn gift to operators from fellow operators.
The entire promise
One VIP. One owner.
Everything else may move.
The public contract stays boring. The machinery underneath is allowed to hustle.
02 / authority1x
One node gets the pen.
Current authority is explicit, leased, and never inferred from vibes.
03 / reconcileLOOP
It keeps checking.
Health expires. State is reconciled. Failover is work, not wishful thinking.
The control loop
Built for the boringly correct outcome.
Four jobs. One daemon. No victory lap. The loop simply starts again.
Watch health
Fresh external evidence decides whether a node may contend.
Own exactly once
Raft or another configured driver grants current authority.
Move the VIP
The authorized node reconciles the local Linux address state.
Tell the network
BGP or an external publisher reports the owner upstream.
Failure is the interface
Pull the plug.
We’ll wait.
Infrastructure gets interesting when something stops answering. Pick a failure and watch the desired state change.
scenario/node-goneThe owner disappears
Authority expires before another node safely takes over.
12:04:31 edge-1 authority expired
12:04:32 edge-2 acquired vip/web
12:04:32 route publication reconciled
Open source · built in public
Serious infrastructure. Made by people who enjoy it.
Service-aware failover for active-active services. Every eligible node can stay ready while one explicit owner holds the VIP. Fresh service-health evidence decides when ownership should move. elasticd is pre-alpha—read the design, challenge the failure model, and help turn the architecture into something operators can trust.
Come break it with us