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/*
* Copyright 2012-2013 by Cloudsoft Corp.
*
* 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 brooklyn.entity.database.postgresql;
import static brooklyn.util.ssh.BashCommands.INSTALL_WGET;
import static brooklyn.util.ssh.BashCommands.alternativesGroup;
import static brooklyn.util.ssh.BashCommands.chainGroup;
import static brooklyn.util.ssh.BashCommands.dontRequireTtyForSudo;
import static brooklyn.util.ssh.BashCommands.executeCommandThenAsUserTeeOutputToFile;
import static brooklyn.util.ssh.BashCommands.fail;
import static brooklyn.util.ssh.BashCommands.ifExecutableElse0;
import static brooklyn.util.ssh.BashCommands.ifExecutableElse1;
import static brooklyn.util.ssh.BashCommands.installPackage;
import static brooklyn.util.ssh.BashCommands.sudo;
import static brooklyn.util.ssh.BashCommands.sudoAsUser;
import static brooklyn.util.ssh.BashCommands.warn;
import static java.lang.String.format;
import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import javax.annotation.Nullable;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import brooklyn.entity.basic.AbstractSoftwareProcessSshDriver;
import brooklyn.entity.basic.Attributes;
import brooklyn.entity.basic.SoftwareProcess;
import brooklyn.entity.database.DatastoreMixins;
import brooklyn.entity.software.SshEffectorTasks;
import brooklyn.location.OsDetails;
import brooklyn.location.basic.SshMachineLocation;
import brooklyn.util.collections.MutableList;
import brooklyn.util.collections.MutableMap;
import brooklyn.util.exceptions.Exceptions;
import brooklyn.util.net.Urls;
import brooklyn.util.stream.Streams;
import brooklyn.util.task.DynamicTasks;
import brooklyn.util.task.ssh.SshTasks;
import brooklyn.util.task.system.ProcessTaskWrapper;
import brooklyn.util.text.Identifiers;
import brooklyn.util.text.StringFunctions;
import brooklyn.util.text.Strings;
import com.google.common.base.Charsets;
import com.google.common.base.Function;
import com.google.common.collect.ImmutableList;
import com.google.common.collect.ImmutableMap;
import com.google.common.collect.Iterables;
import com.google.common.io.Files;
/**
* The SSH implementation of the {@link PostgreSqlDriver}.
*/
public class PostgreSqlSshDriver extends AbstractSoftwareProcessSshDriver implements PostgreSqlDriver {
public static final Logger log = LoggerFactory.getLogger(PostgreSqlSshDriver.class);
public PostgreSqlSshDriver(PostgreSqlNodeImpl entity, SshMachineLocation machine) {
super(entity, machine);
entity.setAttribute(Attributes.LOG_FILE_LOCATION, getLogFile());
}
/*
* TODO this is much messier than we would like because postgres runs as user postgres,
* meaning the dirs must be RW by that user, and accessible (thus all parent paths),
* which may rule out putting it in a location used by the default user.
* Two irritating things:
* * currently we sometimes make up a different onbox base dir;
* * currently we put files to /tmp for staging
* Could investigate if it really needs to run as user postgres;
* could also see whether default user can be added to group postgres,
* and the run dir (and all parents) made accessible to group postgres.
*/
@Override
public void install() {
String version = getEntity().getConfig(SoftwareProcess.SUGGESTED_VERSION);
String majorMinorVersion = version.substring(0, version.lastIndexOf("-"));
String shortVersion = majorMinorVersion.replace(".", "");
String altTarget = "/opt/brooklyn/postgres/";
String altInstallDir = Urls.mergePaths(altTarget, "install/"+majorMinorVersion);
Iterable pgctlLocations = ImmutableList.of(
altInstallDir+"/bin",
"/usr/lib/postgresql/"+majorMinorVersion+"/bin/",
"/opt/local/lib/postgresql"+shortVersion+"/bin/",
"/usr/pgsql-"+majorMinorVersion+"/bin",
"/usr/local/bin/",
"/usr/bin/",
"/bin/");
DynamicTasks.queueIfPossible(SshTasks.dontRequireTtyForSudo(getMachine(),
// sudo is absolutely required here, in customize we set user to postgres
true)).orSubmitAndBlock();
DynamicTasks.waitForLast();
// Check whether we can find a usable pg_ctl, and if not install one
MutableList findOrInstall = MutableList.of()
.append("which pg_ctl")
.appendAll(Iterables.transform(pgctlLocations, StringFunctions.formatter("test -x %s/pg_ctl")))
.append(installPackage(ImmutableMap.of(
"yum", "postgresql"+shortVersion+" postgresql"+shortVersion+"-server",
"apt", "postgresql-"+majorMinorVersion,
"port", "postgresql"+shortVersion+" postgresql"+shortVersion+"-server"
), null))
// due to impl of installPackage, it will not come to the line below I don't think
.append(warn(format("WARNING: failed to find or install postgresql %s binaries", majorMinorVersion)));
// Link to correct binaries folder (different versions of pg_ctl and psql don't always play well together)
MutableList linkFromHere = MutableList.of()
.append(ifExecutableElse1("pg_ctl", chainGroup(
"PG_EXECUTABLE=`which pg_ctl`",
"PG_DIR=`dirname $PG_EXECUTABLE`",
"echo 'found pg_ctl in '$PG_DIR' on path so linking PG bin/ to that dir'",
"ln -s $PG_DIR bin")))
.appendAll(Iterables.transform(pgctlLocations, givenDirIfFileExistsInItLinkToDir("pg_ctl", "bin")))
.append(fail(format("WARNING: failed to find postgresql %s binaries for pg_ctl, may already have another version installed; aborting", majorMinorVersion), 9));
newScript(INSTALLING)
.body.append(
dontRequireTtyForSudo(),
ifExecutableElse0("yum", getYumRepository(version, majorMinorVersion, shortVersion)),
ifExecutableElse0("apt-get", getAptRepository()),
"rm -f bin", // if left over from previous incomplete/failed install (not sure why that keeps happening!)
alternativesGroup(findOrInstall),
alternativesGroup(linkFromHere))
.failOnNonZeroResultCode()
.queue();
// check that the proposed install dir is one that user postgres can access
if (DynamicTasks.queue(SshEffectorTasks.ssh(sudoAsUser("postgres", "ls "+getInstallDir())).allowingNonZeroExitCode()
.summary("check postgres user can access install dir")).asTask().getUnchecked()!=0) {
log.info("Postgres install dir "+getInstallDir()+" for "+getEntity()+" is not accessible to user 'postgres'; " + "using "+altInstallDir+" instead");
String newRunDir = Urls.mergePaths(altTarget, "apps", getEntity().getApplication().getId(), getEntity().getId());
if (DynamicTasks.queue(SshEffectorTasks.ssh("ls "+altInstallDir+"/pg_ctl").allowingNonZeroExitCode()
.summary("check whether "+altInstallDir+" is set up")).asTask().getUnchecked()==0) {
// alt target already exists with binary; nothing to do for install
} else {
DynamicTasks.queue(SshEffectorTasks.ssh(
"mkdir -p "+altInstallDir,
"rm -rf '"+altInstallDir+"'",
"mv "+getInstallDir()+" "+altInstallDir,
"rm -rf '"+getInstallDir()+"'",
"ln -s "+altInstallDir+" "+getInstallDir(),
"mkdir -p " + newRunDir,
"chown -R postgres:postgres "+altTarget).runAsRoot().requiringExitCodeZero()
.summary("move install dir from user to postgres owned space"));
}
DynamicTasks.waitForLast();
setInstallDir(altInstallDir);
setRunDir(newRunDir);
}
}
private String getYumRepository(String version, String majorMinorVersion, String shortVersion) {
// postgres becomes available if you add the repos using an RPM such as
// http://yum.postgresql.org/9.3/redhat/rhel-6-i386/pgdg-centos93-9.3-1.noarch.rpm
// fedora, rhel, sl, and centos supported for RPM's
OsDetails osDetails = getMachine().getMachineDetails().getOsDetails();
String arch = osDetails.getArch();
String osMajorVersion = osDetails.getVersion();
String osName = osDetails.getName();
log.debug("postgres detecting yum information for "+getEntity()+" at "+getMachine()+": "+osName+", "+osMajorVersion+", "+arch);
if (osName==null) osName = ""; else osName = osName.toLowerCase();
if (osName.equals("ubuntu")) return "echo skipping yum repo setup as this is not an rpm environment";
if (osName.equals("rhel")) osName = "redhat";
else if (osName.equals("centos")) osName = "centos";
else if (osName.equals("sl") || osName.startsWith("scientific")) osName = "sl";
else if (osName.equals("fedora")) osName = "fedora";
else {
log.debug("insufficient OS family information '"+osName+"' for "+getMachine()+" when installing "+getEntity()+" (yum repos); treating as centos");
osName = "centos";
}
if (Strings.isBlank(arch)) {
log.warn("Insuffient architecture information '"+arch+"' for "+getMachine()+"when installing "+getEntity()+"; treating as x86_64");
arch = "x86_64";
}
if (Strings.isBlank(osMajorVersion)) {
if (osName.equals("fedora")) osMajorVersion = "20";
else osMajorVersion = "6";
log.warn("Insuffient OS version information '"+getMachine().getOsDetails().getVersion()+"' for "+getMachine()+"when installing "+getEntity()+" (yum repos); treating as "+osMajorVersion);
} else {
if (osMajorVersion.indexOf(".")>0)
osMajorVersion = osMajorVersion.substring(0, osMajorVersion.indexOf('.'));
}
return chainGroup(
INSTALL_WGET,
sudo(format("wget http://yum.postgresql.org/%s/redhat/rhel-%s-%s/pgdg-%s%s-%s.noarch.rpm", majorMinorVersion, osMajorVersion, arch, osName, shortVersion, version)),
sudo(format("rpm -Uvh pgdg-%s%s-%s.noarch.rpm", osName, shortVersion, version))
);
}
private String getAptRepository() {
return chainGroup(
INSTALL_WGET,
"wget --quiet -O - http://apt.postgresql.org/pub/repos/apt/ACCC4CF8.asc | sudo tee -a apt-key add -",
"echo \"deb http://apt.postgresql.org/pub/repos/apt/ $(sudo lsb_release --codename --short)-pgdg main\" | sudo tee -a /etc/apt/sources.list.d/postgresql.list"
);
}
private static Function givenDirIfFileExistsInItLinkToDir(final String filename, final String linkToMake) {
return new Function() {
public String apply(@Nullable String dir) {
return ifExecutableElse1(Urls.mergePaths(dir, filename),
chainGroup("echo 'found "+filename+" in "+dir+" so linking to it in "+linkToMake+"'", "ln -s "+dir+" "+linkToMake));
}
};
}
@Override
public void customize() {
// Some OSes start postgres during package installation
DynamicTasks.queue(SshEffectorTasks.ssh(sudoAsUser("postgres", "/etc/init.d/postgresql stop")).allowingNonZeroExitCode()).get();
newScript(CUSTOMIZING)
.body.append(
sudo("mkdir -p " + getDataDir()),
sudo("chown postgres:postgres " + getDataDir()),
sudo("chmod 700 " + getDataDir()),
sudo("touch " + getLogFile()),
sudo("chown postgres:postgres " + getLogFile()),
sudo("touch " + getPidFile()),
sudo("chown postgres:postgres " + getPidFile()),
alternativesGroup(
chainGroup(format("test -e %s", getInstallDir() + "/bin/initdb"),
sudoAsUser("postgres", getInstallDir() + "/bin/initdb -D " + getDataDir())),
callPgctl("initdb", true)))
.failOnNonZeroResultCode()
.execute();
String configUrl = getEntity().getConfig(PostgreSqlNode.CONFIGURATION_FILE_URL);
if (Strings.isBlank(configUrl)) {
// http://wiki.postgresql.org/wiki/Tuning_Your_PostgreSQL_Server
// If the same setting is listed multiple times, the last one wins.
DynamicTasks.queue(SshEffectorTasks.ssh(
executeCommandThenAsUserTeeOutputToFile(
chainGroup(
"echo \"listen_addresses = '*'\"",
"echo \"port = " + getEntity().getPostgreSqlPort() + "\"",
"echo \"max_connections = " + getEntity().getMaxConnections() + "\"",
"echo \"shared_buffers = " + getEntity().getSharedMemory() + "\"",
"echo \"external_pid_file = '" + getPidFile() + "'\""),
"postgres", getDataDir() + "/postgresql.conf")));
} else {
String contents = processTemplate(configUrl);
DynamicTasks.queue(
SshEffectorTasks.put("/tmp/postgresql.conf").contents(contents),
SshEffectorTasks.ssh(sudoAsUser("postgres", "cp /tmp/postgresql.conf " + getDataDir() + "/postgresql.conf")));
}
String authConfigUrl = getEntity().getConfig(PostgreSqlNode.AUTHENTICATION_CONFIGURATION_FILE_URL);
if (Strings.isBlank(authConfigUrl)) {
DynamicTasks.queue(SshEffectorTasks.ssh(
// TODO give users control which hosts can connect and the authentication mechanism
executeCommandThenAsUserTeeOutputToFile("echo \"host all all 0.0.0.0/0 md5\"", "postgres", getDataDir() + "/pg_hba.conf")));
} else {
String contents = processTemplate(authConfigUrl);
DynamicTasks.queue(
SshEffectorTasks.put("/tmp/pg_hba.conf").contents(contents),
SshEffectorTasks.ssh(sudoAsUser("postgres", "cp /tmp/pg_hba.conf " + getDataDir() + "/pg_hba.conf")));
}
// Wait for commands to complete before running the creation script
DynamicTasks.waitForLast();
// Capture log file contents if there is an error configuring the database
try {
executeDatabaseCreationScript();
} catch (RuntimeException r) {
copyLogFileContents();
throw Exceptions.propagate(r);
}
// Try establishing an external connection. If you get a "Connection refused...accepting TCP/IP connections
// on port 5432?" error then the port is probably closed. Check that the firewall allows external TCP/IP
// connections (netstat -nap). You can open a port with lokkit or by configuring the iptables.
}
protected void executeDatabaseCreationScript() {
if (copyDatabaseCreationScript()) {
newScript("running postgres creation script")
.body.append(
"cd " + getInstallDir(),
callPgctl("start", true),
sudoAsUser("postgres", getInstallDir() + "/bin/psql -p " + entity.getAttribute(PostgreSqlNode.POSTGRESQL_PORT) + " --file " + getRunDir() + "/creation-script.sql"),
callPgctl("stop", true))
.failOnNonZeroResultCode()
.execute();
}
}
private boolean installFile(InputStream contents, String destName) {
String uid = Identifiers.makeRandomId(8);
// TODO currently put in /tmp for staging, since run dir may not be accessible to ssh user
getMachine().copyTo(contents, "/tmp/"+destName+"_"+uid);
DynamicTasks.queueIfPossible(SshEffectorTasks.ssh(
"cd "+getRunDir(),
"mv /tmp/"+destName+"_"+uid+" "+destName,
"chown postgres:postgres "+destName,
"chmod 644 "+destName)
.runAsRoot().requiringExitCodeZero())
.orSubmitAndBlock(getEntity()).andWaitForSuccess();
return true;
}
private boolean copyDatabaseCreationScript() {
InputStream creationScript = DatastoreMixins.getDatabaseCreationScript(entity);
if (creationScript==null)
return false;
return installFile(creationScript, "creation-script.sql");
}
public String getDataDir() {
return getRunDir() + "/data";
}
public String getLogFile() {
return getRunDir() + "/postgresql.log";
}
public String getPidFile() {
return getRunDir() + "/postgresql.pid";
}
public void copyLogFileContents() {
try {
File file = File.createTempFile("postgresql-log", getEntity().getId());
int result = getMachine().copyFrom(getLogFile(), file.getAbsolutePath());
if (result != 0) throw new IllegalStateException("Could not access log file " + getLogFile());
log.info("Saving {} contents as {}", getLogFile(), file);
Streams.logStreamTail(log, "postgresql.log", Streams.byteArrayOfString(Files.toString(file, Charsets.UTF_8)), 1024);
} catch (IOException ioe) {
log.debug("Error reading copied log file: {}", ioe);
}
}
protected String callPgctl(String command, boolean waitForIt) {
return sudoAsUser("postgres", getInstallDir() + "/bin/pg_ctl -D " + getDataDir() +
" -l " + getLogFile() + (waitForIt ? " -w " : " ") + command);
}
@Override
public void launch() {
log.info(String.format("Starting entity %s at %s", this, getLocation()));
newScript(MutableMap.of("usePidFile", false), LAUNCHING)
.body.append(callPgctl("start", false))
.execute();
}
@Override
public boolean isRunning() {
return newScript(MutableMap.of("usePidFile", getPidFile()), CHECK_RUNNING)
.body.append(getStatusCmd())
.execute() == 0;
}
@Override
public void stop() {
newScript(MutableMap.of("usePidFile", false), STOPPING)
.body.append(callPgctl((entity.getConfig(PostgreSqlNode.DISCONNECT_ON_STOP) ? "-m immediate " : "") + "stop", false))
.failOnNonZeroResultCode()
.execute();
newScript(MutableMap.of("usePidFile", getPidFile(), "processOwner", "postgres"), STOPPING).execute();
}
@Override
public PostgreSqlNodeImpl getEntity() {
return (PostgreSqlNodeImpl) super.getEntity();
}
@Override
public String getStatusCmd() {
return callPgctl("status", false);
}
public ProcessTaskWrapper executeScriptAsync(String commands) {
String filename = "postgresql-commands-"+Identifiers.makeRandomId(8);
installFile(Streams.newInputStreamWithContents(commands), filename);
return executeScriptFromInstalledFileAsync(filename);
}
public ProcessTaskWrapper executeScriptFromInstalledFileAsync(String filenameAlreadyInstalledAtServer) {
return DynamicTasks.queue(
SshEffectorTasks.ssh(
"cd "+getRunDir(),
sudoAsUser("postgres", getInstallDir() + "/bin/psql -p " + entity.getAttribute(PostgreSqlNode.POSTGRESQL_PORT) + " --file " + filenameAlreadyInstalledAtServer))
.summary("executing datastore script "+filenameAlreadyInstalledAtServer));
}
}
