minio/cmd/server-startup-msg.go
poornas a3e806ed61 Add disk based edge caching support. (#5182)
This PR adds disk based edge caching support for minio server.

Cache settings can be configured in config.json to take list of disk drives,
cache expiry in days and file patterns to exclude from cache or via environment
variables MINIO_CACHE_DRIVES, MINIO_CACHE_EXCLUDE and MINIO_CACHE_EXPIRY

Design assumes that Atime support is enabled and the list of cache drives is
fixed.
 - Objects are cached on both GET and PUT/POST operations.
 - Expiry is used as hint to evict older entries from cache, or if 80% of cache
   capacity is filled.
 - When object storage backend is down, GET, LIST and HEAD operations fetch
   object seamlessly from cache.

Current Limitations
 - Bucket policies are not cached, so anonymous operations are not supported in
   offline mode.
 - Objects are distributed using deterministic hashing among list of cache
   drives specified.If one or more drives go offline, or cache drive
   configuration is altered - performance could degrade to linear lookup.

Fixes #4026
2018-03-28 14:14:06 -07:00

220 lines
7.7 KiB
Go

/*
* Minio Cloud Storage, (C) 2016, 2017, 2018 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 (
"context"
"crypto/x509"
"fmt"
"net/url"
"runtime"
"strings"
humanize "github.com/dustin/go-humanize"
)
// Documentation links, these are part of message printing code.
const (
mcQuickStartGuide = "https://docs.minio.io/docs/minio-client-quickstart-guide"
goQuickStartGuide = "https://docs.minio.io/docs/golang-client-quickstart-guide"
jsQuickStartGuide = "https://docs.minio.io/docs/javascript-client-quickstart-guide"
javaQuickStartGuide = "https://docs.minio.io/docs/java-client-quickstart-guide"
pyQuickStartGuide = "https://docs.minio.io/docs/python-client-quickstart-guide"
dotnetQuickStartGuide = "https://docs.minio.io/docs/dotnet-client-quickstart-guide"
)
// generates format string depending on the string length and padding.
func getFormatStr(strLen int, padding int) string {
formatStr := fmt.Sprintf("%ds", strLen+padding)
return "%" + formatStr
}
// Prints the formatted startup message.
func printStartupMessage(apiEndPoints []string) {
strippedAPIEndpoints := stripStandardPorts(apiEndPoints)
// If cache layer is enabled, print cache capacity.
cacheObjectAPI := newCacheObjectsFn()
if cacheObjectAPI != nil {
printCacheStorageInfo(cacheObjectAPI.StorageInfo(context.Background()))
}
// Object layer is initialized then print StorageInfo.
objAPI := newObjectLayerFn()
if objAPI != nil {
printStorageInfo(objAPI.StorageInfo(context.Background()))
}
// Prints credential, region and browser access.
printServerCommonMsg(strippedAPIEndpoints)
// Prints `mc` cli configuration message chooses
// first endpoint as default.
printCLIAccessMsg(strippedAPIEndpoints[0], "myminio")
// Prints documentation message.
printObjectAPIMsg()
// SSL is configured reads certification chain, prints
// authority and expiry.
if globalIsSSL {
printCertificateMsg(globalPublicCerts)
}
}
// strip api endpoints list with standard ports such as
// port "80" and "443" before displaying on the startup
// banner. Returns a new list of API endpoints.
func stripStandardPorts(apiEndpoints []string) (newAPIEndpoints []string) {
newAPIEndpoints = make([]string, len(apiEndpoints))
// Check all API endpoints for standard ports and strip them.
for i, apiEndpoint := range apiEndpoints {
url, err := url.Parse(apiEndpoint)
if err != nil {
newAPIEndpoints[i] = apiEndpoint
continue
}
host, port := mustSplitHostPort(url.Host)
// For standard HTTP(s) ports such as "80" and "443"
// apiEndpoints should only be host without port.
switch {
case url.Scheme == "http" && port == "80":
fallthrough
case url.Scheme == "https" && port == "443":
url.Host = host
newAPIEndpoints[i] = url.String()
default:
newAPIEndpoints[i] = apiEndpoint
}
}
return newAPIEndpoints
}
// Prints common server startup message. Prints credential, region and browser access.
func printServerCommonMsg(apiEndpoints []string) {
// Get saved credentials.
cred := globalServerConfig.GetCredential()
// Get saved region.
region := globalServerConfig.GetRegion()
apiEndpointStr := strings.Join(apiEndpoints, " ")
// Colorize the message and print.
log.Println(colorBlue("Endpoint: ") + colorBold(fmt.Sprintf(getFormatStr(len(apiEndpointStr), 1), apiEndpointStr)))
log.Println(colorBlue("AccessKey: ") + colorBold(fmt.Sprintf("%s ", cred.AccessKey)))
log.Println(colorBlue("SecretKey: ") + colorBold(fmt.Sprintf("%s ", cred.SecretKey)))
if region != "" {
log.Println(colorBlue("Region: ") + colorBold(fmt.Sprintf(getFormatStr(len(region), 3), region)))
}
printEventNotifiers()
if globalIsBrowserEnabled {
log.Println(colorBlue("\nBrowser Access:"))
log.Println(fmt.Sprintf(getFormatStr(len(apiEndpointStr), 3), apiEndpointStr))
}
}
// Prints bucket notification configurations.
func printEventNotifiers() {
arns := globalNotificationSys.GetARNList()
if len(arns) == 0 {
return
}
arnMsg := colorBlue("SQS ARNs: ")
for _, arn := range arns {
arnMsg += colorBold(fmt.Sprintf(getFormatStr(len(arn), 1), arn))
}
log.Println(arnMsg)
}
// Prints startup message for command line access. Prints link to our documentation
// and custom platform specific message.
func printCLIAccessMsg(endPoint string, alias string) {
// Get saved credentials.
cred := globalServerConfig.GetCredential()
// Configure 'mc', following block prints platform specific information for minio client.
log.Println(colorBlue("\nCommand-line Access: ") + mcQuickStartGuide)
if runtime.GOOS == globalWindowsOSName {
mcMessage := fmt.Sprintf("$ mc.exe config host add %s %s %s %s", alias, endPoint, cred.AccessKey, cred.SecretKey)
log.Println(fmt.Sprintf(getFormatStr(len(mcMessage), 3), mcMessage))
} else {
mcMessage := fmt.Sprintf("$ mc config host add %s %s %s %s", alias, endPoint, cred.AccessKey, cred.SecretKey)
log.Println(fmt.Sprintf(getFormatStr(len(mcMessage), 3), mcMessage))
}
}
// Prints startup message for Object API acces, prints link to our SDK documentation.
func printObjectAPIMsg() {
log.Println(colorBlue("\nObject API (Amazon S3 compatible):"))
log.Println(colorBlue(" Go: ") + fmt.Sprintf(getFormatStr(len(goQuickStartGuide), 8), goQuickStartGuide))
log.Println(colorBlue(" Java: ") + fmt.Sprintf(getFormatStr(len(javaQuickStartGuide), 6), javaQuickStartGuide))
log.Println(colorBlue(" Python: ") + fmt.Sprintf(getFormatStr(len(pyQuickStartGuide), 4), pyQuickStartGuide))
log.Println(colorBlue(" JavaScript: ") + jsQuickStartGuide)
log.Println(colorBlue(" .NET: ") + fmt.Sprintf(getFormatStr(len(dotnetQuickStartGuide), 6), dotnetQuickStartGuide))
}
// Get formatted disk/storage info message.
func getStorageInfoMsg(storageInfo StorageInfo) string {
msg := fmt.Sprintf("%s %s Free, %s Total", colorBlue("Drive Capacity:"),
humanize.IBytes(uint64(storageInfo.Free)),
humanize.IBytes(uint64(storageInfo.Total)))
if storageInfo.Backend.Type == Erasure {
diskInfo := fmt.Sprintf(" %d Online, %d Offline. ", storageInfo.Backend.OnlineDisks, storageInfo.Backend.OfflineDisks)
msg += colorBlue("\nStatus:") + fmt.Sprintf(getFormatStr(len(diskInfo), 8), diskInfo)
}
return msg
}
// Prints startup message of storage capacity and erasure information.
func printStorageInfo(storageInfo StorageInfo) {
log.Println(getStorageInfoMsg(storageInfo))
log.Println()
}
func printCacheStorageInfo(storageInfo StorageInfo) {
msg := fmt.Sprintf("%s %s Free, %s Total", colorBlue("Cache Capacity:"),
humanize.IBytes(uint64(storageInfo.Free)),
humanize.IBytes(uint64(storageInfo.Total)))
log.Println(msg)
}
// Prints certificate expiry date warning
func getCertificateChainMsg(certs []*x509.Certificate) string {
msg := colorBlue("\nCertificate expiry info:\n")
totalCerts := len(certs)
var expiringCerts int
for i := totalCerts - 1; i >= 0; i-- {
cert := certs[i]
if cert.NotAfter.Before(UTCNow().Add(globalMinioCertExpireWarnDays)) {
expiringCerts++
msg += fmt.Sprintf(colorBold("#%d %s will expire on %s\n"), expiringCerts, cert.Subject.CommonName, cert.NotAfter)
}
}
if expiringCerts > 0 {
return msg
}
return ""
}
// Prints the certificate expiry message.
func printCertificateMsg(certs []*x509.Certificate) {
log.Println(getCertificateChainMsg(certs))
}