open-consul/command/operator_autopilot_set.go

117 lines
3.7 KiB
Go

package command
import (
"flag"
"fmt"
"strings"
"time"
"github.com/hashicorp/consul/api"
"github.com/hashicorp/consul/command/base"
)
type OperatorAutopilotSetCommand struct {
base.Command
}
func (c *OperatorAutopilotSetCommand) Help() string {
helpText := `
Usage: consul operator autopilot set-config [options]
Modifies the current Autopilot configuration.
` + c.Command.Help()
return strings.TrimSpace(helpText)
}
func (c *OperatorAutopilotSetCommand) Synopsis() string {
return "Modify the current Autopilot configuration"
}
func (c *OperatorAutopilotSetCommand) Run(args []string) int {
var cleanupDeadServers base.BoolValue
var maxTrailingLogs base.UintValue
var lastContactThreshold base.DurationValue
var serverStabilizationTime base.DurationValue
var redundancyZoneTag base.StringValue
var disableUpgradeMigration base.BoolValue
f := c.Command.NewFlagSet(c)
f.Var(&cleanupDeadServers, "cleanup-dead-servers",
"Controls whether Consul will automatically remove dead servers "+
"when new ones are successfully added. Must be one of `true|false`.")
f.Var(&maxTrailingLogs, "max-trailing-logs",
"Controls the maximum number of log entries that a server can trail the "+
"leader by before being considered unhealthy.")
f.Var(&lastContactThreshold, "last-contact-threshold",
"Controls the maximum amount of time a server can go without contact "+
"from the leader before being considered unhealthy. Must be a duration value "+
"such as `200ms`.")
f.Var(&serverStabilizationTime, "server-stabilization-time",
"Controls the minimum amount of time a server must be stable in the "+
"'healthy' state before being added to the cluster. Only takes effect if all "+
"servers are running Raft protocol version 3 or higher. Must be a duration "+
"value such as `10s`.")
f.Var(&redundancyZoneTag, "redundancy-zone-tag",
"(Enterprise-only) Controls the node_meta tag name used for separating servers into "+
"different redundancy zones.")
f.Var(&disableUpgradeMigration, "disable-upgrade-migration",
"(Enterprise-only) Controls whether Consul will avoid promoting new servers until "+
"it can perform a migration. Must be one of `true|false`.")
if err := c.Command.Parse(args); err != nil {
if err == flag.ErrHelp {
return 0
}
c.UI.Error(fmt.Sprintf("Failed to parse args: %v", err))
return 1
}
// Set up a client.
client, err := c.Command.HTTPClient()
if err != nil {
c.UI.Error(fmt.Sprintf("Error initializing client: %s", err))
return 1
}
// Fetch the current configuration.
operator := client.Operator()
conf, err := operator.AutopilotGetConfiguration(nil)
if err != nil {
c.UI.Error(fmt.Sprintf("Error querying Autopilot configuration: %s", err))
return 1
}
// Update the config values based on the set flags.
cleanupDeadServers.Merge(&conf.CleanupDeadServers)
redundancyZoneTag.Merge(&conf.RedundancyZoneTag)
disableUpgradeMigration.Merge(&conf.DisableUpgradeMigration)
trailing := uint(conf.MaxTrailingLogs)
maxTrailingLogs.Merge(&trailing)
conf.MaxTrailingLogs = uint64(trailing)
last := time.Duration(*conf.LastContactThreshold)
lastContactThreshold.Merge(&last)
conf.LastContactThreshold = api.NewReadableDuration(last)
stablization := time.Duration(*conf.ServerStabilizationTime)
serverStabilizationTime.Merge(&stablization)
conf.ServerStabilizationTime = api.NewReadableDuration(stablization)
// Check-and-set the new configuration.
result, err := operator.AutopilotCASConfiguration(conf, nil)
if err != nil {
c.UI.Error(fmt.Sprintf("Error setting Autopilot configuration: %s", err))
return 1
}
if result {
c.UI.Output("Configuration updated!")
return 0
}
c.UI.Output("Configuration could not be atomically updated, please try again")
return 1
}