def run_solr_standalone(hostname: str = fqdn(),
port: int = MC_SOLR_STANDALONE_PORT,
base_data_dir: str = MC_SOLR_BASE_DATA_DIR,
dist_directory: str = MC_DIST_DIR,
solr_version: str = MC_SOLR_VERSION,
jvm_heap_size: str = MC_SOLR_STANDALONE_JVM_HEAP_SIZE):
"""Run standalone instance of Solr."""
if not __solr_is_installed(dist_directory=dist_directory,
solr_version=solr_version):
l.info("Solr is not installed, installing...")
__install_solr(dist_directory=dist_directory,
solr_version=solr_version)
base_data_dir = resolve_absolute_path_under_mc_root(path=base_data_dir,
must_exist=True)
standalone_data_dir = __standalone_data_dir(base_data_dir=base_data_dir)
if tcp_port_is_open(port=port):
raise McSolrRunException("Port %d is already open on this machine." %
port)
l.info("Starting standalone Solr instance on port %d..." % port)
__run_solr(hostname=hostname,
port=port,
instance_data_dir=standalone_data_dir,
jvm_heap_size=jvm_heap_size,
jvm_opts=MC_SOLR_STANDALONE_JVM_OPTS,
connect_timeout=MC_SOLR_STANDALONE_CONNECT_RETRIES,
dist_directory=dist_directory,
solr_version=solr_version)
def run_solr_standalone(
hostname: str = fqdn(),
port: int = MC_SOLR_STANDALONE_PORT,
base_data_dir: str = MC_SOLR_BASE_DATA_DIR,
dist_directory: str = MC_DIST_DIR,
solr_version: str = MC_SOLR_VERSION,
jvm_heap_size: str = MC_SOLR_STANDALONE_JVM_HEAP_SIZE,
):
"""Run standalone instance of Solr."""
if not __solr_is_installed(dist_directory=dist_directory, solr_version=solr_version):
l.info("Solr is not installed, installing...")
__install_solr(dist_directory=dist_directory, solr_version=solr_version)
base_data_dir = resolve_absolute_path_under_mc_root(path=base_data_dir, must_exist=True)
standalone_data_dir = __standalone_data_dir(base_data_dir=base_data_dir)
if tcp_port_is_open(port=port):
raise Exception("Port %d is already open on this machine." % port)
l.info("Starting standalone Solr instance on port %d..." % port)
__run_solr(
hostname=hostname,
port=port,
instance_data_dir=standalone_data_dir,
jvm_heap_size=jvm_heap_size,
jvm_opts=MC_SOLR_STANDALONE_JVM_OPTS,
connect_timeout=MC_SOLR_STANDALONE_CONNECT_RETRIES,
dist_directory=dist_directory,
solr_version=solr_version,
)
def run_solr_shard(shard_num: int,
shard_count: int,
hostname: str = None,
starting_port: int = MC_SOLR_CLUSTER_STARTING_PORT,
base_data_dir: str = MC_SOLR_BASE_DATA_DIR,
dist_directory: str = MC_DIST_DIR,
solr_version: str = MC_SOLR_VERSION,
zookeeper_host: str = MC_SOLR_CLUSTER_ZOOKEEPER_HOST,
zookeeper_port: int = MC_SOLR_CLUSTER_ZOOKEEPER_PORT,
jvm_heap_size: str = MC_SOLR_CLUSTER_JVM_HEAP_SIZE) -> None:
"""Run Solr shard, install Solr if needed; read configuration from ZooKeeper."""
if shard_num < 1:
raise McSolrRunException("Shard number must be 1 or greater.")
if shard_count < 1:
raise McSolrRunException("Shard count must be 1 or greater.")
if not __solr_is_installed(dist_directory=dist_directory,
solr_version=solr_version):
log.info("Solr is not installed, installing...")
__install_solr(dist_directory=dist_directory,
solr_version=solr_version)
if hostname is None:
hostname = fqdn()
base_data_dir = resolve_absolute_path_under_mc_root(path=base_data_dir,
must_exist=True)
shard_port = __shard_port(shard_num=shard_num, starting_port=starting_port)
shard_data_dir = __shard_data_dir(shard_num=shard_num,
base_data_dir=base_data_dir)
log.info("Waiting for ZooKeeper to start on %s:%d..." %
(zookeeper_host, zookeeper_port))
wait_for_tcp_port_to_open(
hostname=zookeeper_host,
port=zookeeper_port,
retries=MC_SOLR_CLUSTER_ZOOKEEPER_CONNECT_RETRIES)
log.info("ZooKeeper is up!")
log.info("Starting Solr shard %d on port %d..." % (shard_num, shard_port))
# noinspection SpellCheckingInspection
shard_args = [
"-DzkHost=%s:%d" % (zookeeper_host, zookeeper_port),
"-DnumShards=%d" % shard_count,
]
__run_solr(hostname=hostname,
port=shard_port,
instance_data_dir=shard_data_dir,
jvm_heap_size=jvm_heap_size,
jvm_opts=MC_SOLR_CLUSTER_JVM_OPTS,
start_jar_args=shard_args,
connect_timeout=MC_SOLR_CLUSTER_CONNECT_RETRIES,
dist_directory=dist_directory,
solr_version=solr_version)
def run_solr_shard(shard_num: int,
shard_count: int,
hostname: str = None,
starting_port: int = MC_SOLR_CLUSTER_STARTING_PORT,
base_data_dir: str = MC_SOLR_BASE_DATA_DIR,
dist_directory: str = MC_DIST_DIR,
solr_version: str = MC_SOLR_VERSION,
zookeeper_host: str = MC_SOLR_CLUSTER_ZOOKEEPER_HOST,
zookeeper_port: int = MC_SOLR_CLUSTER_ZOOKEEPER_PORT,
jvm_heap_size: str = MC_SOLR_CLUSTER_JVM_HEAP_SIZE) -> None:
"""Run Solr shard, install Solr if needed; read configuration from ZooKeeper."""
if shard_num < 1:
raise McSolrRunException("Shard number must be 1 or greater.")
if shard_count < 1:
raise McSolrRunException("Shard count must be 1 or greater.")
if not __solr_is_installed(dist_directory=dist_directory, solr_version=solr_version):
log.info("Solr is not installed, installing...")
__install_solr(dist_directory=dist_directory, solr_version=solr_version)
if hostname is None:
hostname = fqdn()
base_data_dir = resolve_absolute_path_under_mc_root(path=base_data_dir, must_exist=True)
shard_port = __shard_port(shard_num=shard_num, starting_port=starting_port)
shard_data_dir = __shard_data_dir(shard_num=shard_num, base_data_dir=base_data_dir)
log.info("Waiting for ZooKeeper to start on %s:%d..." % (zookeeper_host, zookeeper_port))
wait_for_tcp_port_to_open(hostname=zookeeper_host,
port=zookeeper_port,
retries=MC_SOLR_CLUSTER_ZOOKEEPER_CONNECT_RETRIES)
log.info("ZooKeeper is up!")
log.info("Starting Solr shard %d on port %d..." % (shard_num, shard_port))
# noinspection SpellCheckingInspection
shard_args = [
"-DzkHost=%s:%d" % (zookeeper_host, zookeeper_port),
"-DnumShards=%d" % shard_count,
]
__run_solr(hostname=hostname,
port=shard_port,
instance_data_dir=shard_data_dir,
jvm_heap_size=jvm_heap_size,
jvm_opts=MC_SOLR_CLUSTER_JVM_OPTS,
start_jar_args=shard_args,
connect_timeout=MC_SOLR_CLUSTER_CONNECT_RETRIES,
dist_directory=dist_directory,
solr_version=solr_version)
def __run_solr(port: int,
instance_data_dir: str,
hostname: str = fqdn(),
jvm_heap_size: str = None,
start_jar_args: List[str] = None,
jvm_opts: List[str] = None,
connect_timeout: int = 120,
dist_directory: str = MC_DIST_DIR,
solr_version: str = MC_SOLR_VERSION) -> None:
"""Run Solr instance."""
if jvm_opts is None:
jvm_opts = MC_SOLR_STANDALONE_JVM_OPTS
if start_jar_args is None:
start_jar_args = []
if not __solr_is_installed():
l.info("Solr is not installed, installing...")
__install_solr()
solr_home_dir = __solr_home_path(solr_home_dir=MC_SOLR_HOME_DIR)
if not os.path.isdir(solr_home_dir):
raise McSolrRunException("Solr home directory '%s' does not exist." %
solr_home_dir)
solr_path = __solr_path(dist_directory=dist_directory,
solr_version=solr_version)
if not os.path.isdir(instance_data_dir):
l.info("Creating data directory at %s..." % instance_data_dir)
mkdir_p(instance_data_dir)
l.info("Updating collections at %s..." % instance_data_dir)
collections = __collections(solr_home_dir=solr_home_dir)
for collection_name, collection_path in sorted(collections.items()):
l.info("Updating collection '%s'..." % collection_name)
collection_conf_src_dir = os.path.join(collection_path, "conf")
if not os.path.isdir(collection_conf_src_dir):
raise McSolrRunException(
"Configuration for collection '%s' at %s does not exist" %
(collection_name, collection_conf_src_dir))
collection_dst_dir = os.path.join(instance_data_dir, collection_name)
mkdir_p(collection_dst_dir)
# Remove and copy configuration in case it has changed
# (don't symlink because Solr 5.5+ doesn't like those)
collection_conf_dst_dir = os.path.join(collection_dst_dir, "conf")
if os.path.lexists(collection_conf_dst_dir):
l.debug("Removing old collection configuration in '%s'..." %
collection_conf_dst_dir)
if os.path.islink(collection_conf_dst_dir):
# Might still be a link from older Solr versions
os.unlink(collection_conf_dst_dir)
else:
shutil.rmtree(collection_conf_dst_dir)
l.info("Copying '%s' to '%s'..." %
(collection_conf_src_dir, collection_conf_dst_dir))
shutil.copytree(collection_conf_src_dir,
collection_conf_dst_dir,
symlinks=False)
l.info("Updating core.properties for collection '%s'..." %
collection_name)
core_properties_path = os.path.join(collection_dst_dir,
"core.properties")
with open(core_properties_path, 'w') as core_properties_file:
core_properties_file.write(
"""
#
# This file is autogenerated. Don't bother editing it!
#
name=%(collection_name)s
instanceDir=%(instance_dir)s
""" % {
"collection_name": collection_name,
"instance_dir": collection_dst_dir,
})
l.info("Symlinking shard configuration...")
config_items_to_symlink = [
"contexts",
"etc",
"modules",
"resources",
"solr.xml",
]
for config_item in config_items_to_symlink:
config_item_src_path = os.path.join(solr_home_dir, config_item)
if not os.path.exists(config_item_src_path):
raise McSolrRunException(
"Expected configuration item '%s' does not exist" %
config_item_src_path)
# Recreate symlink just in case
config_item_dst_path = os.path.join(instance_data_dir, config_item)
if os.path.lexists(config_item_dst_path):
if not os.path.islink(config_item_dst_path):
raise McSolrRunException(
"Configuration item '%s' exists but is not a symlink." %
config_item_dst_path)
os.unlink(config_item_dst_path)
l.info("Symlinking '%s' to '%s'..." %
(config_item_src_path, config_item_dst_path))
relative_symlink(config_item_src_path, config_item_dst_path)
jetty_home_path = __jetty_home_path(dist_directory=dist_directory,
solr_version=solr_version)
l.info("Symlinking libraries and JARs...")
library_items_to_symlink = [
"lib",
"solr-webapp",
"start.jar",
"solr",
"solr-webapp",
]
for library_item in library_items_to_symlink:
library_item_src_path = os.path.join(jetty_home_path, library_item)
if not os.path.exists(library_item_src_path):
raise McSolrRunException(
"Expected library item '%s' does not exist" %
library_item_src_path)
# Recreate symlink just in case
library_item_dst_path = os.path.join(instance_data_dir, library_item)
if os.path.lexists(library_item_dst_path):
if not os.path.islink(library_item_dst_path):
raise McSolrRunException(
"Library item '%s' exists but is not a symlink." %
library_item_dst_path)
os.unlink(library_item_dst_path)
l.info("Symlinking '%s' to '%s'..." %
(library_item_src_path, library_item_dst_path))
relative_symlink(library_item_src_path, library_item_dst_path)
log4j_properties_path = os.path.join(solr_home_dir, "resources",
"log4j.properties")
if not os.path.isfile(log4j_properties_path):
raise McSolrRunException("log4j.properties at '%s' was not found.")
start_jar_path = os.path.join(jetty_home_path, "start.jar")
if not os.path.isfile(start_jar_path):
raise McSolrRunException("start.jar at '%s' was not found." %
start_jar_path)
solr_webapp_path = os.path.abspath(
os.path.join(jetty_home_path, "solr-webapp"))
if not os.path.isdir(solr_webapp_path):
raise McSolrRunException("Solr webapp dir at '%s' was not found." %
solr_webapp_path)
if not hostname_resolves(hostname):
raise McSolrRunException("Hostname '%s' does not resolve." % hostname)
if tcp_port_is_open(port=port):
raise McSolrRunException("Port %d is already open on this machine." %
port)
__raise_if_old_shards_exist()
args = ["java"]
l.info("Starting Solr instance on %s, port %d..." % (hostname, port))
if jvm_heap_size is not None:
args += ["-Xmx%s" % jvm_heap_size]
args += jvm_opts
# noinspection SpellCheckingInspection
args += [
"-server",
"-Djava.util.logging.config.file=file://" +
os.path.abspath(log4j_properties_path),
"-Djetty.base=%s" % instance_data_dir,
"-Djetty.home=%s" % instance_data_dir,
"-Djetty.port=%d" % port,
"-Dsolr.solr.home=%s" % instance_data_dir,
"-Dsolr.data.dir=%s" % instance_data_dir,
"-Dhost=%s" % hostname,
"-Dmediacloud.luceneMatchVersion=%s" % MC_SOLR_LUCENEMATCHVERSION,
# write heap dump to data directory on OOM errors
"-XX:+HeapDumpOnOutOfMemoryError",
"-XX:HeapDumpPath=%s" % instance_data_dir,
# needed for resolving paths to JARs in solrconfig.xml
"-Dmediacloud.solr_dist_dir=%s" % solr_path,
"-Dmediacloud.solr_webapp_dir=%s" % solr_webapp_path,
]
args += start_jar_args
args += [
"-jar",
start_jar_path,
"--module=http",
]
l.debug("Running command: %s" % ' '.join(args))
process = subprocess.Popen(args)
global __solr_pid
__solr_pid = process.pid
# Declare that we don't care about the exit code of the child process so
# it doesn't become a zombie when it gets killed in signal handler
signal.signal(signal.SIGCHLD, signal.SIG_IGN)
signal.signal(signal.SIGTERM, __kill_solr_process
) # SIGTERM is handled differently for whatever reason
atexit.register(__kill_solr_process)
l.info("Solr PID: %d" % __solr_pid)
l.info("Solr is starting on port %d, will be available shortly..." % port)
wait_for_tcp_port_to_open(port=port, retries=connect_timeout)
l.info("Solr is running on port %d!" % port)
while True:
time.sleep(1)
def test_fqdn():
fq_hostname = fqdn()
assert fq_hostname != ''
assert hostname_resolves(fq_hostname) is True
from mediawords.util.network import fqdn
if __name__ == "__main__":
parser = argparse.ArgumentParser(description="Install Solr and start a shard.",
formatter_class=argparse.ArgumentDefaultsHelpFormatter)
shard_group = parser.add_mutually_exclusive_group(required=True)
# Shard number for humans (1, 2, 3, ...)
shard_group.add_argument("-n", "--shard_num", type=int, help="Shard number to start (starts with 1).")
# Shard index for Supervisor (0, 1, 2, ...)
shard_group.add_argument("-i", "--shard_index", type=int, help="Shard index to start (starts with 0).")
parser.add_argument("-c", "--shard_count", type=int, required=True,
help="Number of shards across the whole cluster.")
parser.add_argument("-hn", "--hostname", type=str, required=False, default=fqdn(),
help="Server hostname (must be resolveable by other shards).")
parser.add_argument("-zh", "--zookeeper_host", type=str, required=False, default=MC_SOLR_CLUSTER_ZOOKEEPER_HOST,
help="ZooKeeper host to connect to.")
parser.add_argument("-zp", "--zookeeper_port", type=int, required=False, default=MC_SOLR_CLUSTER_ZOOKEEPER_PORT,
help="ZooKeeper port to connect to.")
parser.add_argument("-mx", "--jvm_heap_size", type=str, required=False, default=MC_SOLR_CLUSTER_JVM_HEAP_SIZE,
help="JVM heap size (-Xmx).")
args = parser.parse_args()
shard_num = args.shard_num
if shard_num is None:
shard_num = args.shard_index + 1
run_solr_shard(shard_num=shard_num,
def test_fqdn():
fq_hostname = fqdn()
assert fq_hostname != ''
assert hostname_resolves(fq_hostname) is True
def __run_solr(
port: int,
instance_data_dir: str,
hostname: str = fqdn(),
jvm_heap_size: str = None,
start_jar_args: List[str] = None,
jvm_opts: List[str] = None,
connect_timeout: int = 120,
dist_directory: str = MC_DIST_DIR,
solr_version: str = MC_SOLR_VERSION,
) -> None:
"""Run Solr instance."""
if jvm_opts is None:
jvm_opts = MC_SOLR_STANDALONE_JVM_OPTS
if start_jar_args is None:
start_jar_args = []
if not __solr_is_installed():
l.info("Solr is not installed, installing...")
__install_solr()
solr_home_dir = __solr_home_path(solr_home_dir=MC_SOLR_HOME_DIR)
if not os.path.isdir(solr_home_dir):
raise Exception("Solr home directory '%s' does not exist." % solr_home_dir)
solr_path = __solr_path(dist_directory=dist_directory, solr_version=solr_version)
if not os.path.isdir(instance_data_dir):
l.info("Creating data directory at %s..." % instance_data_dir)
mkdir_p(instance_data_dir)
l.info("Updating collections at %s..." % instance_data_dir)
collections = __collections(solr_home_dir=solr_home_dir)
for collection_name, collection_path in sorted(collections.items()):
l.info("Updating collection '%s'..." % collection_name)
collection_conf_src_dir = os.path.join(collection_path, "conf")
if not os.path.isdir(collection_conf_src_dir):
raise Exception(
"Configuration for collection '%s' at %s does not exist" % (collection_name, collection_conf_src_dir)
)
collection_dst_dir = os.path.join(instance_data_dir, collection_name)
mkdir_p(collection_dst_dir)
# Remove and copy configuration in case it has changed
# (don't symlink because Solr 5.5+ doesn't like those)
collection_conf_dst_dir = os.path.join(collection_dst_dir, "conf")
if os.path.lexists(collection_conf_dst_dir):
l.debug("Removing old collection configuration in '%s'..." % collection_conf_dst_dir)
if os.path.islink(collection_conf_dst_dir):
# Might still be a link from older Solr versions
os.unlink(collection_conf_dst_dir)
else:
shutil.rmtree(collection_conf_dst_dir)
l.info("Copying '%s' to '%s'..." % (collection_conf_src_dir, collection_conf_dst_dir))
shutil.copytree(collection_conf_src_dir, collection_conf_dst_dir, symlinks=False)
l.info("Updating core.properties for collection '%s'..." % collection_name)
core_properties_path = os.path.join(collection_dst_dir, "core.properties")
with open(core_properties_path, "w") as core_properties_file:
core_properties_file.write(
"""
#
# This file is autogenerated. Don't bother editing it!
#
name=%(collection_name)s
instanceDir=%(instance_dir)s
"""
% {"collection_name": collection_name, "instance_dir": collection_dst_dir}
)
l.info("Symlinking shard configuration...")
config_items_to_symlink = ["contexts", "etc", "modules", "resources", "solr.xml"]
for config_item in config_items_to_symlink:
config_item_src_path = os.path.join(solr_home_dir, config_item)
if not os.path.exists(config_item_src_path):
raise Exception("Expected configuration item '%s' does not exist" % config_item_src_path)
# Recreate symlink just in case
config_item_dst_path = os.path.join(instance_data_dir, config_item)
if os.path.lexists(config_item_dst_path):
if not os.path.islink(config_item_dst_path):
raise Exception("Configuration item '%s' exists but is not a symlink." % config_item_dst_path)
os.unlink(config_item_dst_path)
l.info("Symlinking '%s' to '%s'..." % (config_item_src_path, config_item_dst_path))
relative_symlink(config_item_src_path, config_item_dst_path)
jetty_home_path = __jetty_home_path(dist_directory=dist_directory, solr_version=solr_version)
l.info("Symlinking libraries and JARs...")
library_items_to_symlink = ["lib", "solr-webapp", "start.jar", "solr", "solr-webapp"]
for library_item in library_items_to_symlink:
library_item_src_path = os.path.join(jetty_home_path, library_item)
if not os.path.exists(library_item_src_path):
raise Exception("Expected library item '%s' does not exist" % library_item_src_path)
# Recreate symlink just in case
library_item_dst_path = os.path.join(instance_data_dir, library_item)
if os.path.lexists(library_item_dst_path):
if not os.path.islink(library_item_dst_path):
raise Exception("Library item '%s' exists but is not a symlink." % library_item_dst_path)
os.unlink(library_item_dst_path)
l.info("Symlinking '%s' to '%s'..." % (library_item_src_path, library_item_dst_path))
relative_symlink(library_item_src_path, library_item_dst_path)
log4j_properties_path = os.path.join(solr_home_dir, "resources", "log4j.properties")
if not os.path.isfile(log4j_properties_path):
raise Exception("log4j.properties at '%s' was not found.")
start_jar_path = os.path.join(jetty_home_path, "start.jar")
if not os.path.isfile(start_jar_path):
raise Exception("start.jar at '%s' was not found." % start_jar_path)
solr_webapp_path = os.path.abspath(os.path.join(jetty_home_path, "solr-webapp"))
if not os.path.isdir(solr_webapp_path):
raise Exception("Solr webapp dir at '%s' was not found." % solr_webapp_path)
if not hostname_resolves(hostname):
raise Exception("Hostname '%s' does not resolve." % hostname)
if tcp_port_is_open(port=port):
raise Exception("Port %d is already open on this machine." % port)
__raise_if_old_shards_exist()
args = ["java"]
l.info("Starting Solr instance on %s, port %d..." % (hostname, port))
if jvm_heap_size is not None:
args += ["-Xmx%s" % jvm_heap_size]
args += jvm_opts
# noinspection SpellCheckingInspection
args += [
"-server",
"-Djava.util.logging.config.file=file://" + os.path.abspath(log4j_properties_path),
"-Djetty.base=%s" % instance_data_dir,
"-Djetty.home=%s" % instance_data_dir,
"-Djetty.port=%d" % port,
"-Dsolr.solr.home=%s" % instance_data_dir,
"-Dsolr.data.dir=%s" % instance_data_dir,
"-Dhost=%s" % hostname,
"-Dmediacloud.luceneMatchVersion=%s" % MC_SOLR_LUCENEMATCHVERSION,
# write heap dump to data directory on OOM errors
"-XX:+HeapDumpOnOutOfMemoryError",
"-XX:HeapDumpPath=%s" % instance_data_dir,
# needed for resolving paths to JARs in solrconfig.xml
"-Dmediacloud.solr_dist_dir=%s" % solr_path,
"-Dmediacloud.solr_webapp_dir=%s" % solr_webapp_path,
]
args += start_jar_args
args += ["-jar", start_jar_path, "--module=http"]
l.debug("Running command: %s" % " ".join(args))
process = subprocess.Popen(args)
global __solr_pid
__solr_pid = process.pid
# Declare that we don't care about the exit code of the child process so
# it doesn't become a zombie when it gets killed in signal handler
signal.signal(signal.SIGCHLD, signal.SIG_IGN)
signal.signal(signal.SIGTERM, __kill_solr_process) # SIGTERM is handled differently for whatever reason
atexit.register(__kill_solr_process)
l.info("Solr PID: %d" % __solr_pid)
l.info("Solr is starting on port %d, will be available shortly..." % port)
wait_for_tcp_port_to_open(port=port, retries=connect_timeout)
l.info("Solr is running on port %d!" % port)
while True:
time.sleep(1)
import argparse
from mediawords.solr.run.constants import *
from mediawords.solr.run.solr import run_solr_standalone
from mediawords.util.network import fqdn
if __name__ == "__main__":
parser = argparse.ArgumentParser(
description="Install Solr and start a standalone instance.",
formatter_class=argparse.ArgumentDefaultsHelpFormatter)
parser.add_argument(
"-hn",
"--hostname",
type=str,
required=False,
default=fqdn(),
help="Server hostname (must be resolveable by other shards).")
parser.add_argument("-p",
"--port",
type=int,
required=False,
default=MC_SOLR_STANDALONE_PORT,
help="Port.")
parser.add_argument("-mx",
"--jvm_heap_size",
type=str,
required=False,
default=MC_SOLR_STANDALONE_JVM_HEAP_SIZE,
help="JVM heap size (-Xmx).")
args = parser.parse_args()