com.axemblr.provisionr.amazon.activities.SetupAdminAccess.java Source code

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Here is the source code for com.axemblr.provisionr.amazon.activities.SetupAdminAccess.java

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/*
 * Copyright (c) 2012 S.C. Axemblr Software Solutions S.R.L
 *
 * 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.axemblr.provisionr.amazon.activities;

import com.axemblr.provisionr.api.pool.Machine;
import com.axemblr.provisionr.api.pool.Pool;
import com.axemblr.provisionr.core.CoreProcessVariables;
import com.axemblr.provisionr.core.Mustache;
import com.axemblr.provisionr.core.Ssh;
import com.google.common.base.Charsets;
import static com.google.common.base.Preconditions.checkNotNull;
import com.google.common.collect.ImmutableMap;
import com.google.common.io.Resources;
import java.io.IOException;
import net.schmizz.sshj.SSHClient;
import net.schmizz.sshj.connection.channel.direct.Session;
import org.activiti.engine.delegate.DelegateExecution;
import org.activiti.engine.delegate.JavaDelegate;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

public class SetupAdminAccess implements JavaDelegate {

    private static final Logger LOG = LoggerFactory.getLogger(SetupAdminAccess.class);

    @Override
    public void execute(DelegateExecution execution) throws Exception {
        Pool pool = (Pool) execution.getVariable(CoreProcessVariables.POOL);
        checkNotNull(pool, "Please add the pool description as a process " + "variable with the name '%s'.",
                CoreProcessVariables.POOL);

        Machine machine = (Machine) execution.getVariable("machine");
        LOG.info(">> Connecting to machine {} to setup admin access", machine);

        SSHClient client = Ssh.newClient(machine,
                pool.getAdminAccess().toBuilder().username("ubuntu").createAdminAccess());
        try {
            String puppetScript = renderAndUploadAdminAccessPuppetScript(client, pool);

            renderAndUploadSshdConfig(client, pool);
            uploadSudoersFile(client);

            Session session = client.startSession();
            try {
                session.allocateDefaultPTY();
                final String shellCommand = "while ! which puppet &> /dev/null ; "
                        + "do echo 'Puppet command not found. Waiting for userdata.sh script to finish (10s)' "
                        + "&& sleep 10; " + "done " + "&& sudo puppet apply --verbose " + puppetScript;
                Session.Command command = session.exec(shellCommand);

                Ssh.logCommandOutput(LOG, machine.getExternalId(), command);
                command.join();

                if (command.getExitStatus() != 0) {
                    throw new RuntimeException(
                            String.format("Failed to execute '%s'. Exit code: %d. Exit message: %s", shellCommand,
                                    command.getExitStatus(), command.getExitErrorMessage()));

                } else {
                    LOG.info("<< Command completed successfully with exit code 0");
                }

            } finally {
                session.close();
            }
        } finally {
            client.close();
        }
    }

    private String renderAndUploadAdminAccessPuppetScript(SSHClient client, Pool pool) throws IOException {
        final String destination = "/tmp/adminaccess.pp";
        final String recipe = Mustache.toString(getClass(),
                "/com/axemblr/provisionr/amazon/puppet/adminaccess.pp.mustache",
                ImmutableMap.of("user", pool.getAdminAccess().getUsername(), "publicKey",
                        pool.getAdminAccess().getPublicKey().split(" ")[1]));
        Ssh.createFile(client, recipe, 0600, destination);

        return destination;
    }

    private void renderAndUploadSshdConfig(SSHClient client, Pool pool) throws IOException {
        final String config = Mustache.toString(getClass(),
                "/com/axemblr/provisionr/amazon/puppet/sshd_config.mustache",
                ImmutableMap.of("user", pool.getAdminAccess().getUsername()));
        Ssh.createFile(client, config, 0600, "/tmp/sshd_config");
    }

    private void uploadSudoersFile(SSHClient client) throws IOException {
        final String content = Resources.toString(
                Resources.getResource(getClass(), "/com/axemblr/provisionr/amazon/puppet/sudoers"), Charsets.UTF_8);
        Ssh.createFile(client, content, 0600, "/tmp/sudoers");
    }
}