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minio/runtime-checks.go

71 lines
1.9 KiB

/*
* Minio Cloud Storage, (C) 2015, 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 main
import (
"fmt"
"io/ioutil"
"os"
"runtime"
"strings"
"github.com/hashicorp/go-version"
"github.com/minio/mc/pkg/console"
)
// isContainerized returns true if we are inside a containerized environment.
func isContainerized() bool {
// Docker containers contain ".dockerenv" at their root path.
if _, e := os.Stat("/.dockerenv"); e == nil {
return true
}
// Check if cgroup policies for init process contains docker string.
if cgroupData, e := ioutil.ReadFile("/proc/1/cgroup"); e == nil {
if strings.Contains(string(cgroupData), "/docker-") {
return true
}
}
// Check if env var explicitly set
if allow := os.Getenv("ALLOW_CONTAINER_ROOT"); allow == "1" || strings.ToLower(allow) == "true" {
return true
}
/* Add checks for non-docker containers here. */
return false
}
// check if minimum Go version is met.
func checkGoVersion() {
// Current version.
curVersion, e := version.NewVersion(runtime.Version()[2:])
if e != nil {
console.Fatalln("Unable to determine current go version.", e)
}
// Prepare version constraint.
constraints, e := version.NewConstraint(minGoVersion)
if e != nil {
console.Fatalln("Unable to check go version.")
}
// Check for minimum version.
if !constraints.Check(curVersion) {
console.Fatalln(fmt.Sprintf("Please recompile Minio with Golang version %s.", minGoVersion))
}
}