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minio/cmd/prepare-storage-msg.go

148 lines
4.0 KiB

/*
* Minio Cloud Storage, (C) 2016 Minio, 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,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package cmd
import (
"fmt"
"sync"
humanize "github.com/dustin/go-humanize"
)
// Helper to generate integer sequences into a friendlier user consumable format.
func formatInts(i int, t int) string {
if i < 10 {
if t < 10 {
return fmt.Sprintf("0%d/0%d", i, t)
}
return fmt.Sprintf("0%d/%d", i, t)
}
return fmt.Sprintf("%d/%d", i, t)
}
// Print a given message once.
type printOnceFunc func(msg string)
// Print once is a constructor returning a function printing once.
// internally print uses sync.Once to perform exactly one action.
func printOnceFn() printOnceFunc {
var once sync.Once
return func(msg string) {
once.Do(func() {
log.Println(msg)
})
}
}
// Prints custom message when healing is required for XL and Distributed XL backend.
func printHealMsg(endpoints EndpointList, storageDisks []StorageAPI, fn printOnceFunc) {
msg := getHealMsg(endpoints, storageDisks)
fn(msg)
}
// Disks offline and online strings..
const (
diskOffline = "offline"
diskOnline = "online"
)
// Constructs a formatted heal message, when cluster is found to be in state where it requires healing.
// healing is optional, server continues to initialize object layer after printing this message.
// it is upto the end user to perform a heal if needed.
func getHealMsg(endpoints EndpointList, storageDisks []StorageAPI) string {
healFmtCmd := `"mc admin heal myminio"`
msg := fmt.Sprintf("New disk(s) were found, format them by running - %s\n",
healFmtCmd)
disksInfo, _, _ := getDisksInfo(storageDisks)
for i, info := range disksInfo {
if storageDisks[i] == nil {
continue
}
msg += fmt.Sprintf(
"\n[%s] %s - %s %s",
formatInts(i+1, len(storageDisks)),
endpoints[i],
humanize.IBytes(uint64(info.Total)),
func() string {
if info.Total > 0 {
return diskOnline
}
return diskOffline
}(),
)
}
return msg
}
// Prints regular message when we have sufficient disks to start the cluster.
func printRegularMsg(endpoints EndpointList, storageDisks []StorageAPI, fn printOnceFunc) {
msg := getStorageInitMsg("Initializing data volume.", endpoints, storageDisks)
fn(msg)
}
// Constructs a formatted regular message when we have sufficient disks to start the cluster.
func getStorageInitMsg(titleMsg string, endpoints EndpointList, storageDisks []StorageAPI) string {
msg := colorBlue(titleMsg)
disksInfo, _, _ := getDisksInfo(storageDisks)
for i, info := range disksInfo {
if storageDisks[i] == nil {
continue
}
msg += fmt.Sprintf(
"\n[%s] %s - %s %s",
formatInts(i+1, len(storageDisks)),
endpoints[i],
humanize.IBytes(uint64(info.Total)),
func() string {
if info.Total > 0 {
return diskOnline
}
return diskOffline
}(),
)
}
return msg
}
// Prints initialization message when cluster is being initialized for the first time.
func printFormatMsg(endpoints EndpointList, storageDisks []StorageAPI, fn printOnceFunc) {
msg := getStorageInitMsg("Initializing data volume for the first time.", endpoints, storageDisks)
fn(msg)
}
// Combines each disk errors in a newline formatted string.
// this is a helper function in printing messages across
// all disks.
func combineDiskErrs(storageDisks []StorageAPI, sErrs []error) string {
var msg string
for i, disk := range storageDisks {
if disk == nil {
continue
}
if sErrs[i] == nil {
continue
}
msg += fmt.Sprintf(
"\n[%s] %s : %s",
formatInts(i+1, len(storageDisks)),
storageDisks[i],
sErrs[i],
)
}
return msg
}