All agent containers now receive their bridge IP dynamically via DHCP
from the dnsmasq pool instead of a hash-derived static address:
- nix/templates/harness-base.nix: networking.useDHCP = true
- nix/modules/hive-gateway.nix: expand DHCP pool to full usable range
(.2 to .254 on /24) — was last-14-IPs-only
- hive-sh4re/src/priv_proto.rs: remove agent_ip from NetworkIsolation
- hive-c0re/src/lifecycle/mod.rs: drop agent_network_ip + DHCP_POOL_SIZE
- hive-c0re/src/lifecycle/host_config.rs: remove agent_network_ip call
- hive-priv/src/main.rs: LOCAL_ADDRESS= empty (DHCP assigns IP);
HOST_ADDRESS still set so nixos-container installs default route
before the DHCP lease arrives
- nix/dhcp-pool-size: deleted (no longer needed)
The nix/dhcp-pool-size single-source-of-truth file and all associated
Rust/Nix dual-constant plumbing are gone — there is no static map.
bridge_gateway_ip() is retained (still needed for HOST_ADDRESS).
Closes#2363
No need to preserve agent IPs across this deploy — nothing outside a
container depends on a specific agent IP. Simpler approach: subtract
DHCP_POOL_SIZE from the usable count before hashing so agents only ever
land in [2, usable - DHCP_POOL_SIZE + 1], never in the DHCP pool.
Removes the secondary-hash remap block (~10 lines). Returns None for
subnets too small to hold both agent slots and the pool (edge case;
practical subnets are /24).
Add a DHCP pool to the gateway's dnsmasq so bridge-attached service
containers (hive-ci and future equivalents) get their addresses from
a proper DHCP server instead of a brittle static derivation.
gateway (hive-gateway.nix):
- Add IPv4 arithmetic helpers (ipToInt, intToIp, pow2) to compute the
DHCP pool range at nix eval time from bridgeIp + bridgePrefixLength.
- Reserve the last dhcpPoolSize (14) usable host addresses as the DHCP
pool (e.g. .241-.254 on a /24 with 10.42.0.0 network).
- Add dhcp-range and dhcp-leasefile to the dnsmasq settings block.
The pool is active whenever services.hyperhive.network.enable is true.
hive-ci (hive-ci.nix):
- Remove the ciBridgeIp / ciBridgeOctets static derivation and the
brittle top-of-/24 comment block.
- Switch networking.interfaces.eth0 to useDHCP = true so hive-ci gets
its address from the gateway DHCP pool.
lifecycle (mod.rs, tests.rs):
- Add DHCP_POOL_SIZE = 14 constant (must stay in sync with
dhcpPoolSize in hive-gateway.nix).
- Remap agents whose FNV-1a hash falls in the DHCP pool into the
agent-only window [2, dhcp_start - 1]. Only the rare agent whose
name hashes into the pool is affected; all others keep their IPs.
- Update and extend tests: agent range is now .2-.240 on /24;
add agent_network_ip_never_in_dhcp_pool covering 18 agent names.
