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* Adding explicit MPL license for sub-package This directory and its subdirectories (packages) contain files licensed with the MPLv2 `LICENSE` file in this directory and are intentionally licensed separately from the BSL `LICENSE` file at the root of this repository. * Adding explicit MPL license for sub-package This directory and its subdirectories (packages) contain files licensed with the MPLv2 `LICENSE` file in this directory and are intentionally licensed separately from the BSL `LICENSE` file at the root of this repository. * Updating the license from MPL to Business Source License Going forward, this project will be licensed under the Business Source License v1.1. Please see our blog post for more details at <Blog URL>, FAQ at www.hashicorp.com/licensing-faq, and details of the license at www.hashicorp.com/bsl. * add missing license headers * Update copyright file headers to BUSL-1.1 * Update copyright file headers to BUSL-1.1 * Update copyright file headers to BUSL-1.1 * Update copyright file headers to BUSL-1.1 * Update copyright file headers to BUSL-1.1 * Update copyright file headers to BUSL-1.1 * Update copyright file headers to BUSL-1.1 * Update copyright file headers to BUSL-1.1 * Update copyright file headers to BUSL-1.1 * Update copyright file headers to BUSL-1.1 * Update copyright file headers to BUSL-1.1 * Update copyright file headers to BUSL-1.1 * Update copyright file headers to BUSL-1.1 * Update copyright file headers to BUSL-1.1 * Update copyright file headers to BUSL-1.1 --------- Co-authored-by: hashicorp-copywrite[bot] <110428419+hashicorp-copywrite[bot]@users.noreply.github.com>
89 lines
2.2 KiB
Go
89 lines
2.2 KiB
Go
// Copyright (c) HashiCorp, Inc.
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// SPDX-License-Identifier: BUSL-1.1
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package router
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import (
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"fmt"
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"strings"
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"github.com/hashicorp/consul/agent/metadata"
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"github.com/hashicorp/go-hclog"
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"github.com/hashicorp/serf/serf"
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)
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// FloodAddrFn gets the address and port to use for a given server when
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// flood-joining. This will return false if it doesn't have one.
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type FloodAddrFn func(*metadata.Server) (string, error)
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// FloodJoins attempts to make sure all Consul servers in the src Serf
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// instance are joined in the dst Serf instance. It assumes names in the
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// src area are of the form <node> and those in the dst area are of the
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// form <node>.<dc> as is done for WAN and general network areas in Consul
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// Enterprise.
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func FloodJoins(logger hclog.Logger, addrFn FloodAddrFn,
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localDatacenter string, srcSerf *serf.Serf, dstSerf *serf.Serf) {
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// Names in the dst Serf have the datacenter suffixed.
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suffix := fmt.Sprintf(".%s", localDatacenter)
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// Index the dst side so we can do one pass through the src side
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// with cheap lookups.
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index := make(map[string]*metadata.Server)
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for _, m := range dstSerf.Members() {
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ok, server := metadata.IsConsulServer(m)
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if !ok {
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continue
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}
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if server.Datacenter != localDatacenter {
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continue
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}
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srcName := strings.TrimSuffix(server.Name, suffix)
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index[srcName] = server
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}
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// Now run through the src side and look for joins.
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for _, m := range srcSerf.Members() {
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if m.Status != serf.StatusAlive {
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continue
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}
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ok, server := metadata.IsConsulServer(m)
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if !ok {
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continue
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}
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if _, ok := index[server.Name]; ok {
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continue
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}
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addr, err := addrFn(server)
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if err != nil {
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logger.Debug("Failed to flood-join server", "server",
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server.Name, "address", server.Addr.String(),
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"error", err,
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)
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continue
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}
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dstServerName := fmt.Sprintf("%s.%s", server.Name, server.Datacenter)
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// Do the join!
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n, err := dstSerf.Join([]string{dstServerName + "/" + addr}, true)
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if err != nil {
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logger.Debug("Failed to flood-join server at address",
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"server", dstServerName,
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"address", addr,
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"error", err,
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)
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} else if n > 0 {
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logger.Debug("Successfully performed flood-join for server at address",
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"server", dstServerName,
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"address", addr,
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)
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}
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}
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}
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