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// Copyright 2014 Google Inc. All Rights Reserved.
//
// 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.
// Handler for Docker containers.
package docker
import (
"io/ioutil"
"os"
"path"
"strings"
"testing"
"github.com/docker/docker/api/types/container"
"github.com/stretchr/testify/assert"
)
func TestStorageDirDetectionWithOldVersions(t *testing.T) {
as := assert.New(t)
rwLayer, err := getRwLayerID("abcd", "/", aufsStorageDriver, []int{1, 9, 0})
as.Nil(err)
as.Equal(rwLayer, "abcd")
}
func TestStorageDirDetectionWithNewVersions(t *testing.T) {
as := assert.New(t)
testDir, err := ioutil.TempDir("", "")
as.Nil(err)
containerID := "abcd"
randomizedID := "xyz"
randomIDPath := path.Join(testDir, "image/aufs/layerdb/mounts/", containerID)
as.Nil(os.MkdirAll(randomIDPath, os.ModePerm))
as.Nil(ioutil.WriteFile(path.Join(randomIDPath, "mount-id"), []byte(randomizedID), os.ModePerm))
rwLayer, err := getRwLayerID(containerID, testDir, "aufs", []int{1, 10, 0})
as.Nil(err)
as.Equal(rwLayer, randomizedID)
rwLayer, err = getRwLayerID(containerID, testDir, "aufs", []int{1, 10, 0})
as.Nil(err)
as.Equal(rwLayer, randomizedID)
}
func rawMetadataEnvMatch(dockerEnvWhiteList string, cntConfig container.Config) map[string]string {
metadataEnvs := strings.Split(dockerEnvWhiteList, ",")
handlerEnvs := make(map[string]string)
// split env vars to get metadata map.
for _, exposedEnv := range metadataEnvs {
for _, envVar := range cntConfig.Env {
if envVar != "" {
splits := strings.SplitN(envVar, "=", 2)
if len(splits) == 2 && splits[0] == exposedEnv {
handlerEnvs[strings.ToLower(exposedEnv)] = splits[1]
}
}
}
}
return handlerEnvs
}
func newMetadataEnvMatch(dockerEnvWhiteList string, cntConfig container.Config) map[string]string {
metadataEnvs := strings.Split(dockerEnvWhiteList, ",")
handlerEnvs := make(map[string]string)
// split env vars to get metadata map.
for _, exposedEnv := range metadataEnvs {
if exposedEnv == "" {
// if no dockerEnvWhitelist provided, len(metadataEnvs) == 1, metadataEnvs[0] == ""
continue
}
for _, envVar := range cntConfig.Env {
if envVar != "" {
splits := strings.SplitN(envVar, "=", 2)
if len(splits) == 2 && strings.HasPrefix(splits[0], exposedEnv) {
handlerEnvs[strings.ToLower(splits[0])] = splits[1]
}
}
}
}
return handlerEnvs
}
func TestDockerEnvWhitelist(t *testing.T) {
as := assert.New(t)
envTotalMatch := "TEST_REGION,TEST_ZONE"
envMatchWithPrefix := "TEST_"
envMatchWithPrefixEmpty := ""
rawCntConfig := container.Config{Env: []string{"TEST_REGION=FRA", "TEST_ZONE=A", "HELLO=WORLD"}}
newCntConfig := container.Config{Env: []string{"TEST_REGION=FRA", "TEST_ZONE=A", "TEST_POOL=TOOLING", "HELLO=WORLD"}}
rawExpected := map[string]string{
"test_region": "FRA",
"test_zone": "A",
}
newExpected := map[string]string{
"test_region": "FRA",
"test_zone": "A",
"test_pool": "TOOLING",
}
emptyExpected := map[string]string{}
rawEnvsTotalMatch := rawMetadataEnvMatch(envTotalMatch, rawCntConfig)
newEnvsTotalMatch := newMetadataEnvMatch(envTotalMatch, rawCntConfig)
// make sure total match does not change
as.Equal(rawEnvsTotalMatch, newEnvsTotalMatch)
as.Equal(rawEnvsTotalMatch, rawExpected)
rawEnvsTotalMatch2 := rawMetadataEnvMatch(envTotalMatch, newCntConfig)
newEnvsTotalMatch2 := newMetadataEnvMatch(envTotalMatch, newCntConfig)
// make sure total match does not change with more envs exposed
as.Equal(rawEnvsTotalMatch2, newEnvsTotalMatch2)
as.Equal(rawEnvsTotalMatch2, rawExpected)
newEnvsMatchWithPrefix := newMetadataEnvMatch(envMatchWithPrefix, rawCntConfig)
newEnvsMatchWithPrefix2 := newMetadataEnvMatch(envMatchWithPrefix, newCntConfig)
// make sure new method can return envs with prefix specified
as.Equal(newEnvsMatchWithPrefix, rawExpected)
as.Equal(newEnvsMatchWithPrefix2, newExpected)
newEnvsMatchWithEmptyPrefix := newMetadataEnvMatch(envMatchWithPrefixEmpty, newCntConfig)
rawEnvsMatchWithEmptyWhitelist := rawMetadataEnvMatch(envMatchWithPrefixEmpty, newCntConfig)
// make sure empty whitelist returns nothing
as.Equal(newEnvsMatchWithEmptyPrefix, emptyExpected)
as.Equal(rawEnvsMatchWithEmptyWhitelist, emptyExpected)
}
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