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cmd/natc,tsconsensus: add cluster config admin

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Add the ability for operators of natc in consensus mode to remove
servers from the raft cluster config, without losing other state.

Updates #14667

Signed-off-by: Fran Bull <fran@tailscale.com>
This commit is contained in:
Fran Bull
2025-08-19 13:11:10 -07:00
committed by franbull
parent d986baa18f
commit b48d2de6ab
3 changed files with 75 additions and 0 deletions
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20
tsconsensus/tsconsensus.go
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@@ -525,3 +525,23 @@ func (c *Consensus) raftAddr(host netip.Addr) string {
func (c *Consensus) commandAddr(host netip.Addr) string {
return netip.AddrPortFrom(host, c.config.CommandPort).String()
}
// GetClusterConfiguration returns the result of the underlying raft instance's GetConfiguration
func (c *Consensus) GetClusterConfiguration() (raft.Configuration, error) {
fut := c.raft.GetConfiguration()
err := fut.Error()
if err != nil {
return raft.Configuration{}, err
}
return fut.Configuration(), nil
}
// DeleteClusterServer returns the result of the underlying raft instance's RemoveServer
func (c *Consensus) DeleteClusterServer(id raft.ServerID) (uint64, error) {
fut := c.raft.RemoveServer(id, 0, 1*time.Second)
err := fut.Error()
if err != nil {
return 0, err
}
return fut.Index(), nil
}