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ssm_copy.py
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ssm_copy.py
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import argparse
import re
import sys
import boto3
from botocore.exceptions import ClientError
def rename_parameter(parameter, source_path, target_path):
"""
>>> rename_parameter({'Name':'/old-root/my-param'}, 'old-root', 'new-root')
{'Name': '/new-root/my-param'}
>>> rename_parameter({'Name':'/old-root/my-param'}, '/old-root', '/new-root')
{'Name': '/new-root/my-param'}
>>> rename_parameter({'Name':'old-root/my-param'}, '/old-root', '/new-root')
{'Name': '/new-root/my-param'}
>>> rename_parameter({'Name':'/old-root/my-param'}, '/invalid-root', '/new-root')
{'Name': '/old-root/my-param'}
>>> rename_parameter({'Name':'/old-root/my-param'}, '/old-root', None)
{'Name': '/old-root/my-param'}
>>> rename_parameter({'Name':'my-param'}, "/", "/new-root")
{'Name': '/new-root/my-param'}
>>> rename_parameter({'Name':'old-root/my-param'}, '/old-root', 'new-root')
{'Name': '/new-root/my-param'}
>>> rename_parameter({'Name':'/old-root-not/my-param'}, 'old-root', 'new-root')
{'Name': '/old-root-not/my-param'}
>>> rename_parameter({'Name':'/staging/mysql/MYSQL_OTHERS_PASSWORD'}, '/staging/mysql/MYSQL_OTHERS_PASSWORD', '/pepe/mysql')
{'Name': '/pepe/mysql/MYSQL_OTHERS_PASSWORD'}
>>> rename_parameter({'Name':'MYSQL_OTHERS_PASSWORD'}, 'MYSQL_OTHERS_PASSWORD', '/pepe/mysql')
{'Name': '/pepe/mysql/MYSQL_OTHERS_PASSWORD'}
>>> rename_parameter({'Name':'MYSQL_OTHERS_PASSWORD'}, 'MYSQL_OTHERS_PASSWORD', None)
{'Name': 'MYSQL_OTHERS_PASSWORD'}
"""
result = parameter.copy()
if not target_path:
return result
sp = source_path.strip("/")
tp = target_path.strip("/")
if sp == "":
regex = r"^/?"
elif parameter["Name"].strip("/") == sp:
dir = "/".join(sp.split("/")[0:-1])
if dir:
regex = r"^/?" + dir + "/"
else:
regex = r"^/?"
else:
regex = r"^/?" + sp + "/"
result["Name"] = re.sub(regex, f"/{tp}/", parameter["Name"])
return result
class ParameterCopier(object):
def __init__(self):
self.target_profile = None
self.target_region = None
self.source_profile = None
self.source_region = None
self.source_ssm = None
self.target_ssm = None
self.target_path = None
self.dry_run = False
@staticmethod
def connect_to(profile, region):
kwargs = {}
if profile is not None:
kwargs["profile_name"] = profile
if region is not None:
kwargs["region_name"] = region
return boto3.Session(**kwargs)
def connect_to_source(self, profile, region):
self.source_ssm = self.connect_to(profile, region).client("ssm")
def connect_to_target(self, profile, region):
self.target_ssm = self.connect_to(profile, region).client("ssm")
def load_source_parameters(self, arg, recursive, one_level):
result = {}
paginator = self.source_ssm.get_paginator("describe_parameters")
kwargs = {}
if recursive or one_level:
option = "Recursive" if recursive else "OneLevel"
kwargs["ParameterFilters"] = [
{"Key": "Path", "Option": option, "Values": [arg]}
]
else:
kwargs["ParameterFilters"] = [
{"Key": "Name", "Option": "Equals", "Values": [arg]}
]
for page in paginator.paginate(**kwargs):
for parameter in page["Parameters"]:
result[parameter["Name"]] = parameter
if len(result) == 0:
sys.stderr.write("ERROR: {} not found.\n".format(arg))
sys.exit(1)
return result
def copy_tags(self,
name: str,
new_name: str
):
"""
copy the tags of the parameter `name` to `new_name`. Existing tags on `new_name` will be
removed.
"""
source_tag_list = self.source_ssm.list_tags_for_resource(
ResourceType='Parameter',
ResourceId=name
)['TagList']
source_tags = {tag['Key']: tag['Value'] for tag in source_tag_list}
existing_tags_list = self.target_ssm.list_tags_for_resource(
ResourceType='Parameter',
ResourceId=new_name
)['TagList']
target_tags = {tag['Key']: tag['Value'] for tag in existing_tags_list}
to_remove = list(filter(lambda key: key not in source_tags, target_tags.keys()))
to_add = list(filter(lambda key: key not in target_tags or source_tags[key] != target_tags[key], source_tags.keys()))
if to_remove:
if self.dry_run:
sys.stdout.write(f"DRY-RUN: remove tags {','.join(to_remove)} from {new_name}\n")
else:
self.target_ssm.remove_tags_from_resource(
ResourceType='Parameter',
ResourceId=new_name,
TagKeys=to_remove
)
sys.stdout.write(f"INFO: removed tags {','.join(to_remove)} from {new_name}\n")
if to_add:
if self.dry_run:
sys.stdout.write(f"DRY-RUN: adding tags {','.join(to_add)} from {new_name}\n")
else:
self.target_ssm.add_tags_to_resource(
ResourceType='Parameter',
ResourceId=new_name,
Tags=[{'Key': key, 'Value': source_tags[key]} for key in to_add]
)
sys.stdout.write(f"INFO: added tags {','.join(to_add)} to {new_name}\n")
def copy(
self,
args,
recursive,
one_level,
overwrite,
key_id=None,
clear_kms_key=False,
keep_going=False,
with_tags=False,
):
for arg in args:
parameters = self.load_source_parameters(arg, recursive, one_level)
for name in parameters:
value = self.source_ssm.get_parameter(Name=name, WithDecryption=True)
parameter = parameters[name]
parameter["Value"] = value["Parameter"]["Value"]
if "KeyId" in parameter and key_id is not None:
parameter["KeyId"] = key_id
if "KeyId" in parameter and clear_kms_key:
del parameter["KeyId"]
if "LastModifiedDate" in parameter:
del parameter["LastModifiedDate"]
if "LastModifiedUser" in parameter:
del parameter["LastModifiedUser"]
if "Version" in parameter:
del parameter["Version"]
if "Policies" in parameter:
if not parameter["Policies"]:
# an empty policies list causes an exception
del parameter["Policies"]
parameter["Overwrite"] = overwrite
parameter = rename_parameter(parameter, arg, self.target_path)
new_name = parameter["Name"]
if self.dry_run:
sys.stdout.write(f"DRY-RUN: copying {name} to {new_name}\n")
self.copy_tags(name, new_name)
else:
try:
self.target_ssm.put_parameter(**parameter)
sys.stdout.write(f"INFO: copied {name} to {new_name}\n")
if with_tags:
self.copy_tags(name, new_name)
except self.target_ssm.exceptions.ParameterAlreadyExists as e:
if not keep_going:
sys.stderr.write(
f"ERROR: failed to copy {name} to {new_name} as it already exists: specify --overwrite or --keep-going\n"
)
exit(1)
else:
sys.stderr.write(
f"WARN: skipping copy {name} as {new_name} already exists\n"
)
except ClientError as e:
msg = e.response["Error"]["Message"]
sys.stderr.write(
f"ERROR: failed to copy {name} to {new_name}, {msg}\n"
)
if not keep_going:
exit(1)
def main(self):
parser = argparse.ArgumentParser(description="copy parameter store ")
parser.add_argument(
"--one-level",
"-1",
dest="one_level",
action="store_true",
help="one-level copy",
)
parser.add_argument(
"--recursive",
"-r",
dest="recursive",
action="store_true",
help="recursive copy",
)
group = parser.add_mutually_exclusive_group()
group.add_argument(
"--overwrite",
"-f",
dest="overwrite",
action="store_true",
help="existing values",
)
group.add_argument(
"--keep-going",
"-k",
dest="keep_going",
action="store_true",
help="as much as possible after an error",
)
parser.add_argument(
"--dry-run",
"-N",
dest="dry_run",
action="store_true",
help="only show what is to be copied",
)
parser.add_argument(
"--source-region",
dest="source_region",
help="to get the parameters from ",
metavar="AWS::Region",
)
parser.add_argument(
"--source-profile",
dest="source_profile",
help="to obtain the parameters from",
metavar="NAME",
)
parser.add_argument(
"--region",
dest="target_region",
help="to copy the parameters to ",
metavar="AWS::Region",
)
parser.add_argument(
"--profile",
dest="target_profile",
help="to copy the parameters to",
metavar="NAME",
)
parser.add_argument(
"--target-path",
dest="target_path",
help="to copy the parameters to",
metavar="NAME",
)
key_group = parser.add_mutually_exclusive_group()
key_group.add_argument(
"--key-id",
dest="key_id",
help="to use for parameter values in the destination",
metavar="ID",
)
key_group.add_argument(
"--clear-key-id",
"-C",
dest="clear_key_id",
action="store_true",
help="clear the KMS key id associated with the parameter",
)
key_group.add_argument(
"--with-tags",
"-W",
dest="with_tags",
action="store_true",
help="copy the tags of the parameters too",
)
parser.add_argument(
"parameters", metavar="PARAMETER", type=str, nargs="+", help="source path"
)
options = parser.parse_args()
try:
self.connect_to_source(options.source_profile, options.source_region)
self.connect_to_target(options.target_profile, options.target_region)
self.target_path = options.target_path
self.dry_run = options.dry_run
self.copy(
options.parameters,
options.recursive,
options.one_level,
options.overwrite,
options.key_id,
options.clear_key_id,
options.keep_going,
options.with_tags
)
except ClientError as e:
sys.stderr.write("ERROR: {}\n".format(e))
sys.exit(1)
def main():
cp = ParameterCopier()
cp.main()
if __name__ == "__main__":
main()