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[TrueCloudLab#7] Require only one healthy server

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Signed-off-by: Denis Kirillov <d.kirillov@yadro.com>
This commit is contained in:
Denis Kirillov 2023-01-18 12:44:44 +03:00 • committed by Alex Vanin
parent 7df26d9181
commit 148b1aa7f5
2 changed files with 41 additions and 19 deletions
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50
app.go
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@ -485,33 +485,57 @@ func (a *app) AppParams() *utils.AppParams {
func (a *app) initServers(ctx context.Context) {
serversInfo := fetchServers(a.cfg)
a.servers = make([]Server, len(serversInfo))
for i, serverInfo := range serversInfo {
a.log.Info("added server",
a.servers = make([]Server, 0, len(serversInfo))
for _, serverInfo := range serversInfo {
fields := []zap.Field{
zap.String("address", serverInfo.Address), zap.Bool("tls enabled", serverInfo.TLS.Enabled),
zap.String("tls cert", serverInfo.TLS.CertFile), zap.String("tls key", serverInfo.TLS.KeyFile))
a.servers[i] = newServer(ctx, serverInfo, a.log)
zap.String("tls cert", serverInfo.TLS.CertFile), zap.String("tls key", serverInfo.TLS.KeyFile),
}
srv, err := newServer(ctx, serverInfo)
if err != nil {
a.log.Warn("failed to add server", append(fields, zap.Error(err))...)
continue
}
a.servers = append(a.servers, srv)
a.log.Info("add server", fields...)
}
if len(a.servers) == 0 {
a.log.Fatal("no healthy servers")
}
}
func (a *app) updateServers() error {
serversInfo := fetchServers(a.cfg)
if len(serversInfo) != len(a.servers) {
return fmt.Errorf("invalid servers configuration: length mismatch: old '%d', new '%d", len(a.servers), len(serversInfo))
}
for i, serverInfo := range serversInfo {
if serverInfo.Address != a.servers[i].Address() {
return fmt.Errorf("invalid servers configuration: addresses mismatch: old '%s', new '%s", a.servers[i].Address(), serverInfo.Address)
var found bool
for _, serverInfo := range serversInfo {
index := a.serverIndex(serverInfo.Address)
if index == -1 {
continue
}
if serverInfo.TLS.Enabled {
if err := a.servers[i].UpdateCert(serverInfo.TLS.CertFile, serverInfo.TLS.KeyFile); err != nil {
if err := a.servers[index].UpdateCert(serverInfo.TLS.CertFile, serverInfo.TLS.KeyFile); err != nil {
return fmt.Errorf("failed to update tls certs: %w", err)
}
}
found = true
}
if !found {
return fmt.Errorf("invalid servers configuration: no known server found")
}
return nil
}
func (a *app) serverIndex(address string) int {
for i := range a.servers {
if a.servers[i].Address() == address {
return i
}
}
return -1
}