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provide local file user data to replace perforce
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131
src/groovy/com/netflix/asgard/userdata/LocalFileUserDataProvider.groovy
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| /* | ||
| * Copyright 2014 Netflix, 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 com.netflix.asgard.userdata | ||
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| import com.netflix.asgard.ApplicationService | ||
| import com.netflix.asgard.Check | ||
| import com.netflix.asgard.ConfigService | ||
| import com.netflix.asgard.Region | ||
| import com.netflix.asgard.Relationships | ||
| import com.netflix.asgard.UserContext | ||
| import com.netflix.asgard.plugin.UserDataProvider | ||
| import com.netflix.frigga.Names | ||
| import org.springframework.beans.factory.annotation.Autowired | ||
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| class LocalFileUserDataProvider implements UserDataProvider { | ||
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| private static final INSERTION_MARKER = '\nexport EC2_REGION=' | ||
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| @Autowired | ||
| ConfigService configService | ||
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| @Autowired | ||
| ApplicationService applicationService | ||
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| String buildUserDataForVariables(UserContext userContext, String appName, | ||
| String autoScalingGroupName, String launchConfigName) { | ||
| String env = configService.getAccountName() | ||
| String rawUserData = assembleUserData(appName, autoScalingGroupName, userContext.region, env) | ||
| replaceUserDataTokens(userContext, rawUserData, appName, env, autoScalingGroupName, | ||
| launchConfigName) | ||
| } | ||
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| private String assembleUserData(String app, String groupName, Region region, String env) { | ||
| def udfRoot = System.getProperty('userDataRoot') ?: '/apps/nflx-udf' | ||
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| // If there is a matching Ruby file for Windows then it should be the entire User Data string, without any Unix | ||
| String udfRuby = getContents("${udfRoot}/custom.d/${app}-${env}.rb") | ||
| if (udfRuby) { | ||
| return udfRuby | ||
| } | ||
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| String cluster = Relationships.clusterFromGroupName(groupName) | ||
| String stack = Relationships.stackNameFromGroupName(groupName) | ||
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| // If no Ruby file then get the component Unix shell template files into string lists including custom files for | ||
| // the app and/or auto scaling group. | ||
| // If app and group names are identical, only include their UDF file once. | ||
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| // LinkedHashSet ensures correct order and no duplicates when the app, cluster, and groupName are equal. | ||
| Set<String> udfPaths = new LinkedHashSet<String>() | ||
| udfPaths << "${udfRoot}/udf0" | ||
| udfPaths << "${udfRoot}/udf-${env}" | ||
| udfPaths << "${udfRoot}/udf-${region}-${env}" | ||
| udfPaths << "${udfRoot}/udf1" | ||
| udfPaths << "${udfRoot}/custom.d/${app}-${env}" | ||
| udfPaths << "${udfRoot}/custom.d/${app}-${stack}-${env}" | ||
| udfPaths << "${udfRoot}/custom.d/${cluster}-${env}" | ||
| udfPaths << "${udfRoot}/custom.d/${groupName}-${env}" | ||
| udfPaths << "${udfRoot}/custom.region.d/${region}/${app}-${env}" | ||
| udfPaths << "${udfRoot}/custom.region.d/${region}/${app}-${stack}-${env}" | ||
| udfPaths << "${udfRoot}/custom.region.d/${region}/${cluster}-${env}" | ||
| udfPaths << "${udfRoot}/custom.region.d/${region}/${groupName}-${env}" | ||
| udfPaths << "${udfRoot}/udf2" | ||
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| // Concat all the Unix shell templates into one string | ||
| udfPaths.collect { String path -> getContents(path) }.join('') | ||
| } | ||
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| private String getContents(String filePath) { | ||
| try { | ||
| File file = new File(filePath) | ||
| String contents = file.getText('UTF-8') | ||
| if (contents.length() && !contents.endsWith("\n")) { contents = contents + '\n' } | ||
| return contents | ||
| } catch (IOException ignore) { | ||
| // This normal case happens if the requested file is not found. | ||
| return '' | ||
| } | ||
| } | ||
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| private String replaceUserDataTokens(UserContext userContext, String rawUserData, String app, String env, | ||
| String autoScalingGroupName, String launchConfigName) { | ||
| Check.notNull(rawUserData, String, 'rawUserData') | ||
| Check.notNull(app, String, 'app') | ||
| Check.notNull(env, String, 'env') | ||
| Check.notNull(autoScalingGroupName, String, 'autoScalingGroupName') | ||
| Check.notNull(launchConfigName, String, 'launchConfigName') | ||
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| Names names = Relationships.dissectCompoundName(autoScalingGroupName) | ||
| String stack = names.stack ?: '' | ||
| String cluster = names.cluster ?: '' | ||
| String region = userContext.region.code | ||
| String tier = applicationService.getMonitorBucket(userContext, app, names.cluster) | ||
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| // Replace the tokens & return the result | ||
| String result = rawUserData | ||
| .replace('%%app%%', app) | ||
| .replace('%%tier%%', tier) | ||
| .replace('%%env%%', env) | ||
| .replace('%%region%%', region) | ||
| .replace('%%group%%', autoScalingGroupName) | ||
| .replace('%%autogrp%%', autoScalingGroupName) | ||
| .replace('%%cluster%%', cluster) | ||
| .replace('%%stack%%', stack) | ||
| .replace('%%launchconfig%%', launchConfigName) | ||
| .replace('%%app_group%%', applicationService.getRegisteredApplication(userContext, app)?.group ?: '') | ||
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| List<String> additionalEnvVars = Relationships.labeledEnvironmentVariables(names, | ||
| configService.userDataVarPrefix) | ||
| if (additionalEnvVars) { | ||
| String insertion = "\n${additionalEnvVars.join('\n')}" | ||
| result = result.replace(INSERTION_MARKER, "\n${insertion}${INSERTION_MARKER}") | ||
| } | ||
| result | ||
| } | ||
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| } | ||
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