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monitored_config.go
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/
monitored_config.go
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// Copyright 2020 PingCAP, Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// See the License for the specific language governing permissions and
// limitations under the License.
package task
import (
"context"
"fmt"
"path/filepath"
"github.com/google/uuid"
"github.com/pingcap/tiup/pkg/checkpoint"
"github.com/pingcap/tiup/pkg/cluster/ctxt"
"github.com/pingcap/tiup/pkg/cluster/spec"
"github.com/pingcap/tiup/pkg/cluster/template"
"github.com/pingcap/tiup/pkg/cluster/template/config"
"github.com/pingcap/tiup/pkg/cluster/template/scripts"
system "github.com/pingcap/tiup/pkg/cluster/template/systemd"
logprinter "github.com/pingcap/tiup/pkg/logger/printer"
"github.com/pingcap/tiup/pkg/meta"
"github.com/pingcap/tiup/pkg/utils"
"go.uber.org/zap"
)
// MonitoredConfig is used to generate the monitor node configuration
type MonitoredConfig struct {
name string
component string
host string
globResCtl meta.ResourceControl
options *spec.MonitoredOptions
deployUser string
tlsEnabled bool
paths meta.DirPaths
systemdMode spec.SystemdMode
}
// Execute implements the Task interface
func (m *MonitoredConfig) Execute(ctx context.Context) error {
ports := map[string]int{
spec.ComponentNodeExporter: m.options.NodeExporterPort,
spec.ComponentBlackboxExporter: m.options.BlackboxExporterPort,
}
// Copy to remote server
exec, found := ctxt.GetInner(ctx).GetExecutor(m.host)
if !found {
return ErrNoExecutor
}
if err := utils.MkdirAll(m.paths.Cache, 0755); err != nil {
return err
}
if err := m.syncMonitoredSystemConfig(ctx, exec, m.component, ports[m.component], m.systemdMode); err != nil {
return err
}
var cfg template.ConfigGenerator
switch m.component {
case spec.ComponentNodeExporter:
if err := m.syncBlackboxConfig(ctx, exec, config.NewBlackboxConfig(m.paths.Deploy, m.tlsEnabled)); err != nil {
return err
}
cfg = scripts.
NewNodeExporterScript(m.paths.Deploy, m.paths.Log).
WithPort(uint64(m.options.NodeExporterPort)).
WithNumaNode(m.options.NumaNode)
case spec.ComponentBlackboxExporter:
cfg = scripts.
NewBlackboxExporterScript(m.paths.Deploy, m.paths.Log).
WithPort(uint64(m.options.BlackboxExporterPort))
default:
return fmt.Errorf("unknown monitored component %s", m.component)
}
return m.syncMonitoredScript(ctx, exec, m.component, cfg)
}
func (m *MonitoredConfig) syncMonitoredSystemConfig(ctx context.Context, exec ctxt.Executor, comp string, port int, systemdMode spec.SystemdMode) (err error) {
sysCfg := filepath.Join(m.paths.Cache, fmt.Sprintf("%s-%s-%d.service", comp, m.host, port))
// insert checkpoint
point := checkpoint.Acquire(ctx, spec.CopyConfigFile, map[string]any{"config-file": sysCfg})
defer func() {
point.Release(err, zap.String("config-file", sysCfg))
}()
if point.Hit() != nil {
return nil
}
if len(systemdMode) == 0 {
systemdMode = spec.SystemMode
}
resource := spec.MergeResourceControl(m.globResCtl, m.options.ResourceControl)
systemCfg := system.NewConfig(comp, m.deployUser, m.paths.Deploy).
WithMemoryLimit(resource.MemoryLimit).
WithCPUQuota(resource.CPUQuota).
WithIOReadBandwidthMax(resource.IOReadBandwidthMax).
WithIOWriteBandwidthMax(resource.IOWriteBandwidthMax).
WithSystemdMode(string(systemdMode))
// blackbox_exporter needs cap_net_raw to send ICMP ping packets
if comp == spec.ComponentBlackboxExporter {
systemCfg.GrantCapNetRaw = true
}
if err := systemCfg.ConfigToFile(sysCfg); err != nil {
return err
}
tgt := filepath.Join("/tmp", comp+"_"+uuid.New().String()+".service")
if err := exec.Transfer(ctx, sysCfg, tgt, false, 0, false); err != nil {
return err
}
systemdDir := "/etc/systemd/system/"
sudo := true
if systemdMode == spec.UserMode {
systemdDir = "~/.config/systemd/user/"
sudo = false
}
if outp, errp, err := exec.Execute(ctx, fmt.Sprintf("mv %s %s%s-%d.service", tgt, systemdDir, comp, port), sudo); err != nil {
if len(outp) > 0 {
fmt.Println(string(outp))
}
if len(errp) > 0 {
ctx.Value(logprinter.ContextKeyLogger).(*logprinter.Logger).
Errorf(string(errp))
}
return err
}
return nil
}
func (m *MonitoredConfig) syncMonitoredScript(ctx context.Context, exec ctxt.Executor, comp string, cfg template.ConfigGenerator) error {
fp := filepath.Join(m.paths.Cache, fmt.Sprintf("run_%s_%s.sh", comp, m.host))
if err := cfg.ConfigToFile(fp); err != nil {
return err
}
dst := filepath.Join(m.paths.Deploy, "scripts", fmt.Sprintf("run_%s.sh", comp))
if err := exec.Transfer(ctx, fp, dst, false, 0, false); err != nil {
return err
}
if _, _, err := exec.Execute(ctx, "chmod +x "+dst, false); err != nil {
return err
}
return nil
}
func (m *MonitoredConfig) syncBlackboxConfig(ctx context.Context, exec ctxt.Executor, cfg template.ConfigGenerator) error {
fp := filepath.Join(m.paths.Cache, fmt.Sprintf("blackbox_%s.yaml", m.host))
if err := cfg.ConfigToFile(fp); err != nil {
return err
}
dst := filepath.Join(m.paths.Deploy, "conf", "blackbox.yml")
return exec.Transfer(ctx, fp, dst, false, 0, false)
}
// Rollback implements the Task interface
func (m *MonitoredConfig) Rollback(ctx context.Context) error {
return ErrUnsupportedRollback
}
// String implements the fmt.Stringer interface
func (m *MonitoredConfig) String() string {
return fmt.Sprintf("MonitoredConfig: cluster=%s, user=%s, node_exporter_port=%d, blackbox_exporter_port=%d, %v",
m.name, m.deployUser, m.options.NodeExporterPort, m.options.BlackboxExporterPort, m.paths)
}