minio/cmd/prepare-storage-msg.go

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/*
* 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"
"net/url"
"sync"
humanize "github.com/dustin/go-humanize"
"github.com/minio/mc/pkg/console"
)
// Helper to generate integer sequences into a friendlier user consumable format.
func int2Str(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() { console.Println(msg) })
}
}
// Prints custom message when healing is required for XL and Distributed XL backend.
func printHealMsg(firstEndpoint string, storageDisks []StorageAPI, fn printOnceFunc) {
msg := getHealMsg(firstEndpoint, storageDisks)
fn(msg)
}
// 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(firstEndpoint string, storageDisks []StorageAPI) string {
msg := fmt.Sprintln("\nData volume requires HEALING. Please run the following command:")
msg += "MINIO_ACCESS_KEY=%s "
msg += "MINIO_SECRET_KEY=%s "
msg += "minio control heal %s"
creds := serverConfig.GetCredential()
msg = fmt.Sprintf(msg, creds.AccessKeyID, creds.SecretAccessKey, firstEndpoint)
disksInfo, _, _ := getDisksInfo(storageDisks)
for i, info := range disksInfo {
if storageDisks[i] == nil {
continue
}
msg += fmt.Sprintf(
"\n[%s] %s - %s %s",
int2Str(i+1, len(storageDisks)),
storageDisks[i],
humanize.IBytes(uint64(info.Total)),
func() string {
if info.Total > 0 {
return "online"
}
return "offline"
}(),
)
}
return msg
}
// Prints regular message when we have sufficient disks to start the cluster.
func printRegularMsg(endpoints []*url.URL, storageDisks []StorageAPI, fn printOnceFunc) {
msg := getStorageInitMsg("\nInitializing 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 []*url.URL, 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",
int2Str(i+1, len(storageDisks)),
endpoints[i],
humanize.IBytes(uint64(info.Total)),
func() string {
if info.Total > 0 {
return "online"
}
return "offline"
}(),
)
}
return msg
}
// Prints initialization message when cluster is being initialized for the first time.
func printFormatMsg(endpoints []*url.URL, storageDisks []StorageAPI, fn printOnceFunc) {
msg := getStorageInitMsg("\nInitializing data volume for the first time.", endpoints, storageDisks)
fn(msg)
}
func printConfigErrMsg(storageDisks []StorageAPI, sErrs []error, fn printOnceFunc) {
msg := getConfigErrMsg(storageDisks, sErrs)
fn(msg)
}
// Generate a formatted message when cluster is misconfigured.
func getConfigErrMsg(storageDisks []StorageAPI, sErrs []error) string {
msg := colorBlue("\nDetected configuration inconsistencies in the cluster. Please fix following servers.")
for i, disk := range storageDisks {
if disk == nil {
continue
}
if sErrs[i] == nil {
continue
}
msg += fmt.Sprintf(
"\n[%s] %s : %s",
int2Str(i+1, len(storageDisks)),
storageDisks[i],
sErrs[i],
)
}
return msg
}