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grafana.go
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grafana.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 spec
import (
"fmt"
"path/filepath"
"github.com/pingcap/errors"
"github.com/pingcap/tiup/pkg/cluster/executor"
"github.com/pingcap/tiup/pkg/cluster/template/config"
"github.com/pingcap/tiup/pkg/cluster/template/scripts"
"github.com/pingcap/tiup/pkg/meta"
)
// GrafanaSpec represents the Grafana topology specification in topology.yaml
type GrafanaSpec struct {
Host string `yaml:"host"`
SSHPort int `yaml:"ssh_port,omitempty"`
Imported bool `yaml:"imported,omitempty"`
Port int `yaml:"port" default:"3000"`
DeployDir string `yaml:"deploy_dir,omitempty"`
ResourceControl meta.ResourceControl `yaml:"resource_control,omitempty"`
Arch string `yaml:"arch,omitempty"`
OS string `yaml:"os,omitempty"`
}
// Role returns the component role of the instance
func (s GrafanaSpec) Role() string {
return ComponentGrafana
}
// SSH returns the host and SSH port of the instance
func (s GrafanaSpec) SSH() (string, int) {
return s.Host, s.SSHPort
}
// GetMainPort returns the main port of the instance
func (s GrafanaSpec) GetMainPort() int {
return s.Port
}
// IsImported returns if the node is imported from TiDB-Ansible
func (s GrafanaSpec) IsImported() bool {
return s.Imported
}
// GrafanaComponent represents Grafana component.
type GrafanaComponent struct{ *Specification }
// Name implements Component interface.
func (c *GrafanaComponent) Name() string {
return ComponentGrafana
}
// Instances implements Component interface.
func (c *GrafanaComponent) Instances() []Instance {
ins := make([]Instance, 0, len(c.Grafana))
for _, s := range c.Grafana {
ins = append(ins, &GrafanaInstance{
instance: instance{
InstanceSpec: s,
name: c.Name(),
host: s.Host,
port: s.Port,
sshp: s.SSHPort,
topo: c.Specification,
usedPorts: []int{
s.Port,
},
usedDirs: []string{
s.DeployDir,
},
statusFn: func(_ ...string) string {
return "-"
},
},
})
}
return ins
}
// GrafanaInstance represent the grafana instance
type GrafanaInstance struct {
instance
}
// InitConfig implement Instance interface
func (i *GrafanaInstance) InitConfig(e executor.Executor, clusterName, clusterVersion, deployUser string, paths meta.DirPaths) error {
if err := i.instance.InitConfig(e, clusterName, clusterVersion, deployUser, paths); err != nil {
return err
}
// transfer run script
cfg := scripts.NewGrafanaScript(clusterName, paths.Deploy)
fp := filepath.Join(paths.Cache, fmt.Sprintf("run_grafana_%s_%d.sh", i.GetHost(), i.GetPort()))
if err := cfg.ConfigToFile(fp); err != nil {
return err
}
dst := filepath.Join(paths.Deploy, "scripts", "run_grafana.sh")
if err := e.Transfer(fp, dst, false); err != nil {
return err
}
if _, _, err := e.Execute("chmod +x "+dst, false); err != nil {
return err
}
// transfer config
fp = filepath.Join(paths.Cache, fmt.Sprintf("grafana_%s.ini", i.GetHost()))
if err := config.NewGrafanaConfig(i.GetHost(), paths.Deploy).WithPort(uint64(i.GetPort())).ConfigToFile(fp); err != nil {
return err
}
dst = filepath.Join(paths.Deploy, "conf", "grafana.ini")
if err := e.Transfer(fp, dst, false); err != nil {
return err
}
// transfer dashboard.yml
fp = filepath.Join(paths.Cache, fmt.Sprintf("dashboard_%s.yml", i.GetHost()))
if err := config.NewDashboardConfig(clusterName, paths.Deploy).ConfigToFile(fp); err != nil {
return err
}
dst = filepath.Join(paths.Deploy, "conf", "dashboard.yml")
if err := e.Transfer(fp, dst, false); err != nil {
return err
}
// transfer datasource.yml
if len(i.instance.topo.Monitors) == 0 {
return errors.New("no prometheus found in topology")
}
fp = filepath.Join(paths.Cache, fmt.Sprintf("datasource_%s.yml", i.GetHost()))
if err := config.NewDatasourceConfig(clusterName, i.instance.topo.Monitors[0].Host).
WithPort(uint64(i.instance.topo.Monitors[0].Port)).
ConfigToFile(fp); err != nil {
return err
}
dst = filepath.Join(paths.Deploy, "conf", "datasource.yml")
return e.Transfer(fp, dst, false)
}
// ScaleConfig deploy temporary config on scaling
func (i *GrafanaInstance) ScaleConfig(e executor.Executor, cluster *Specification,
clusterName string, clusterVersion string, deployUser string, paths meta.DirPaths) error {
s := i.instance.topo
defer func() { i.instance.topo = s }()
i.instance.topo = cluster.Merge(i.instance.topo)
return i.InitConfig(e, clusterName, clusterVersion, deployUser, paths)
}