Documentation
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Overview ¶
Package vip provides deterministic virtual IP generation for Gravity.
Instead of using a per-machine atomic counter (which requires coordination), this package hashes a connection's 5-tuple plus container ID to produce a deterministic IPv6 address within a /96 subnet. Any Gravity instance given the same inputs will compute the same VIP, enabling zero-coordination failover.
Index ¶
Constants ¶
This section is empty.
Variables ¶
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Functions ¶
func GenerateDeterministicIPV6 ¶
func GenerateDeterministicIPV6(containerID string, srcIP net.IP, srcPort uint16, dstIP net.IP, dstPort uint16, subnet net.IPNet) (net.IP, error)
GenerateDeterministicIPV6 produces a deterministic IPv6 address within the given /96 subnet by hashing the provided connection parameters.
The function hashes containerID, srcIP, srcPort, dstIP, and dstPort using SHA-256, extracts a 32-bit host identifier from the hash, and embeds it into the last 32 bits of the subnet address.
Parameters:
- containerID: unique identifier for the container
- srcIP: source IP address of the connection
- srcPort: source port of the connection
- dstIP: destination IP address of the connection
- dstPort: destination port of the connection
- subnet: a /96 IPv6 subnet to place the address in
Returns the generated IPv6 address, or an error if the subnet is not /96.
Types ¶
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Source Files