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package gossip |
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import ( |
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"errors" |
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"fmt" |
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hash "github.com/Permify/permify/pkg/consistent" |
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"net" |
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) |
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// IGossip is an interface that represents the basic operations |
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// of a gossip-based membership protocol. Implementations of this |
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// interface should provide mechanisms for synchronizing cluster |
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// membership and managing the lifecycle of the gossip protocol. |
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type IGossip interface { |
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SyncNodes(consistent *hash.ConsistentHash, nodeName, port string) |
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// Shutdown gracefully stops the gossip protocol and performs |
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// any necessary cleanup. It returns an error if the shutdown |
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// process encounters any issues. |
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Shutdown() error |
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} |
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// InitMemberList initializes a memberlist instance with the given |
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func InitMemberList(nodes string, name string) (IGossip, error) { |
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switch name { |
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case "serf": |
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return NewSerfGossip(nodes) |
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default: |
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return nil, fmt.Errorf("protocol not implamented: %s ", name) |
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} |
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} |
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// ExternalIP returns the first non-loopback IPv4 address |
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func ExternalIP() (string, error) { |
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// Get a list of network interfaces. |
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interfaces, err := net.Interfaces() |
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if err != nil { |
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return "", err |
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} |
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// Iterate over the network interfaces. |
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for _, iface := range interfaces { |
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// Skip the interface if it's down or a loopback interface. |
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if iface.Flags&net.FlagUp == 0 || iface.Flags&net.FlagLoopback != 0 { |
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continue |
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} |
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// Get a list of addresses associated with the interface. |
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addresses, err := iface.Addrs() |
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if err != nil { |
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return "", err |
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} |
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// Iterate over the addresses. |
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for _, addr := range addresses { |
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// Extract the IP address from the address. |
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var ip net.IP |
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switch v := addr.(type) { |
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case *net.IPNet: |
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ip = v.IP |
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case *net.IPAddr: |
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ip = v.IP |
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} |
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// Skip the address if it's a loopback address or not IPv4. |
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if ip == nil || ip.IsLoopback() || ip.To4() == nil { |
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continue |
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} |
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// Return the IPv4 address as a string. |
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return ip.String(), nil |
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} |
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} |
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// Return an empty string if no external IPv4 address is found. |
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return "", errors.New("network error") |
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} |
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Permify /
permify
