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handle_hosts.go
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handle_hosts.go
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package main
import (
"fmt"
"os"
"github.com/olekukonko/tablewriter"
karma "github.com/reconquest/karma-go"
)
func handleHosts(
zabbix *Zabbix,
config *Config,
args map[string]interface{},
) error {
var (
hostnames, _ = parseSearchQuery(args["<pattern>"].([]string))
removeHost, _ = args["--remove"].(string)
err error
hostsTable, hosts []Host
)
destiny := karma.Describe("method", "handleHosts")
switch {
case removeHost != "":
err = handleRemoveHosts(zabbix, config, args)
if err != nil {
return destiny.Describe(
"error", err,
).Reason(
"can't remove zabbix hosts",
)
}
default:
for _, hostname := range hostnames {
hosts, err = searchHosts(zabbix, hostname)
if err != nil {
return destiny.Describe(
"error", err,
).Describe(
"hostname", hostname,
).Reason(
"can't search zabbix hosts",
)
}
hostsTable = append(hostsTable, hosts...)
}
if len(hostsTable) > 0 {
err = printHostsTable(hostsTable)
if err != nil {
debugf("Error: %+v", err)
}
}
}
return nil
}
func handleRemoveHosts(
zabbix *Zabbix,
config *Config,
args map[string]interface{},
) error {
var (
removeHost, _ = args["--remove"].(string)
confirmation = !args["--noconfirm"].(bool)
err error
hosts []Host
)
destiny := karma.Describe(
"method", "removeHost",
).Describe(
"hostname", removeHost,
)
hosts, err = searchHosts(zabbix, removeHost)
if err != nil {
return destiny.Describe(
"error", err,
).Reason(
"can't obtain zabbix hosts",
)
}
if len(hosts) == 0 {
return nil
}
if len(hosts) > 1 {
return destiny.Reason(
"found more then one uniq host",
)
}
err = printHostsTable(hosts)
if err != nil {
debugf("Error: %+v", err)
}
if confirmation {
if !confirmHost("removing", removeHost) {
return nil
}
}
err = withSpinner(
":: Requesting for removing host",
func() error {
payload := []string{hosts[0].ID}
_, err = zabbix.RemoveHosts(payload)
return err
},
)
return err
}
func searchHosts(zabbix *Zabbix, hostname string) ([]Host, error) {
var (
hosts []Host
err error
)
if len(hostname) == 0 {
return hosts, nil
}
params := Params{
"search": Params{
"name": hostname,
},
"output": []string{
"host",
},
"searchWildcardsEnabled": "1",
}
err = withSpinner(
":: Requesting information about hosts",
func() error {
hosts, err = zabbix.GetHosts(params)
return err
},
)
return hosts, err
}
func printHostsTable(hosts []Host) error {
var lines = [][]string{}
for _, host := range hosts {
line := []string{
host.ID,
host.Name,
}
lines = append(lines, line)
}
table := tablewriter.NewWriter(os.Stdout)
table.SetHeader([]string{"ID", "Name"})
table.AppendBulk(lines)
table.Render()
return nil
}
func confirmHost(messages, host string) bool {
var value string
fmt.Fprintf(
os.Stderr,
"\n:: Proceed with %s host %s? [Y/n]:",
messages,
host,
)
_, err := fmt.Scanln(&value)
if err != nil {
debugf("Error: %+v", err)
}
return value == "" || value == "Y" || value == "y"
}