open-consul/command/operator/autopilot/set/operator_autopilot_set.go

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// Copyright (c) HashiCorp, Inc.
// SPDX-License-Identifier: MPL-2.0
package set
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import (
"flag"
"fmt"
"time"
"github.com/hashicorp/consul/api"
"github.com/hashicorp/consul/command/flags"
"github.com/mitchellh/cli"
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)
func New(ui cli.Ui) *cmd {
c := &cmd{UI: ui}
c.init()
return c
}
type cmd struct {
UI cli.Ui
flags *flag.FlagSet
http *flags.HTTPFlags
help string
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// flags
cleanupDeadServers flags.BoolValue
maxTrailingLogs flags.UintValue
minQuorum flags.UintValue
lastContactThreshold flags.DurationValue
serverStabilizationTime flags.DurationValue
redundancyZoneTag flags.StringValue
disableUpgradeMigration flags.BoolValue
upgradeVersionTag flags.StringValue
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}
func (c *cmd) init() {
c.flags = flag.NewFlagSet("", flag.ContinueOnError)
c.flags.Var(&c.cleanupDeadServers, "cleanup-dead-servers",
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"Controls whether Consul will automatically remove dead servers "+
"when new ones are successfully added. Must be one of `true|false`.")
c.flags.Var(&c.maxTrailingLogs, "max-trailing-logs",
"Controls the maximum number of log entries that a server can trail the "+
"leader by before being considered unhealthy.")
c.flags.Var(&c.minQuorum, "min-quorum",
"Sets the minimum number of servers required in a cluster before autopilot "+
"is allowed to prune dead servers.")
c.flags.Var(&c.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`.")
c.flags.Var(&c.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`.")
c.flags.Var(&c.redundancyZoneTag, "redundancy-zone-tag",
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"(Enterprise-only) Controls the node_meta tag name used for separating servers into "+
"different redundancy zones.")
c.flags.Var(&c.disableUpgradeMigration, "disable-upgrade-migration",
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"(Enterprise-only) Controls whether Consul will avoid promoting new servers until "+
"it can perform a migration. Must be one of `true|false`.")
c.flags.Var(&c.upgradeVersionTag, "upgrade-version-tag",
"(Enterprise-only) The node_meta tag to use for version info when performing upgrade "+
"migrations. If left blank, the Consul version will be used.")
c.http = &flags.HTTPFlags{}
flags.Merge(c.flags, c.http.ClientFlags())
flags.Merge(c.flags, c.http.ServerFlags())
c.help = flags.Usage(help, c.flags)
}
func (c *cmd) Run(args []string) int {
if err := c.flags.Parse(args); err != nil {
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if err == flag.ErrHelp {
return 0
}
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c.UI.Error(fmt.Sprintf("Failed to parse args: %v", err))
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return 1
}
// Set up a client.
client, err := c.http.APIClient()
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if err != nil {
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c.UI.Error(fmt.Sprintf("Error initializing client: %s", err))
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return 1
}
// Fetch the current configuration.
operator := client.Operator()
conf, err := operator.AutopilotGetConfiguration(nil)
if err != nil {
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c.UI.Error(fmt.Sprintf("Error querying Autopilot configuration: %s", err))
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return 1
}
// Update the config values based on the set flags.
c.cleanupDeadServers.Merge(&conf.CleanupDeadServers)
c.redundancyZoneTag.Merge(&conf.RedundancyZoneTag)
c.disableUpgradeMigration.Merge(&conf.DisableUpgradeMigration)
c.upgradeVersionTag.Merge(&conf.UpgradeVersionTag)
c.minQuorum.Merge(&conf.MinQuorum)
trailing := uint(conf.MaxTrailingLogs)
c.maxTrailingLogs.Merge(&trailing)
conf.MaxTrailingLogs = uint64(trailing)
last := time.Duration(*conf.LastContactThreshold)
c.lastContactThreshold.Merge(&last)
conf.LastContactThreshold = api.NewReadableDuration(last)
stablization := time.Duration(*conf.ServerStabilizationTime)
c.serverStabilizationTime.Merge(&stablization)
conf.ServerStabilizationTime = api.NewReadableDuration(stablization)
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// Check-and-set the new configuration.
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result, err := operator.AutopilotCASConfiguration(conf, nil)
if err != nil {
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c.UI.Error(fmt.Sprintf("Error setting Autopilot configuration: %s", err))
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return 1
}
if result {
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c.UI.Output("Configuration updated!")
return 0
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}
c.UI.Output("Configuration could not be atomically updated, please try again")
return 1
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}
func (c *cmd) Synopsis() string {
return synopsis
}
func (c *cmd) Help() string {
return c.help
}
const synopsis = "Modify the current Autopilot configuration"
const help = `
Usage: consul operator autopilot set-config [options]
Modifies the current Autopilot configuration.
`