mirror of
https://github.com/kevinveenbirkenbach/docker-volume-backup.git
synced 2024-11-25 01:31:03 +01:00
Implemented postgres backup and check for stop and restart for file backup necessary
This commit is contained in:
parent
a1c33c1747
commit
02062c7d49
@ -8,10 +8,12 @@ import pathlib
|
||||
import pandas
|
||||
from datetime import datetime
|
||||
|
||||
#Ok
|
||||
class BackupException(Exception):
|
||||
"""Generic exception for backup errors."""
|
||||
pass
|
||||
|
||||
# OK
|
||||
def execute_shell_command(command):
|
||||
"""Execute a shell command and return its output."""
|
||||
print(command)
|
||||
@ -21,30 +23,53 @@ def execute_shell_command(command):
|
||||
raise BackupException(f"Error in command: {command}\nOutput: {out}\nError: {err}\nExit code: {process.returncode}")
|
||||
return [line.decode("utf-8") for line in out.splitlines()]
|
||||
|
||||
# OK
|
||||
def get_machine_id():
|
||||
"""Get the machine identifier."""
|
||||
return execute_shell_command("sha256sum /etc/machine-id")[0][0:64]
|
||||
|
||||
# OK
|
||||
def create_backup_directories(base_dir, machine_id, repository_name, backup_time):
|
||||
"""Create necessary directories for backup."""
|
||||
version_dir = os.path.join(base_dir, machine_id, repository_name, backup_time)
|
||||
pathlib.Path(version_dir).mkdir(parents=True, exist_ok=True)
|
||||
return version_dir
|
||||
|
||||
# OK
|
||||
def get_database_name(container):
|
||||
"""Extract the database name from the container name."""
|
||||
return re.split("(_|-)(database|db)", container)[0]
|
||||
|
||||
def backup_database(container, databases, version_dir):
|
||||
# OK
|
||||
def backup_mariadb(container, databases, version_dir):
|
||||
"""Backup database if applicable."""
|
||||
database_name = get_database_name(container)
|
||||
database_entry = databases.loc[databases['database'] == database_name].iloc[0]
|
||||
mysqldump_destination_dir = os.path.join(version_dir, "sql")
|
||||
pathlib.Path(mysqldump_destination_dir).mkdir(parents=True, exist_ok=True)
|
||||
mysqldump_destination_file = os.path.join(mysqldump_destination_dir, "backup.sql")
|
||||
mysqldump_destination_file = os.path.join(mysqldump_destination_dir, f"{database_name}_backup.sql")
|
||||
database_backup_command = f"docker exec {container} /usr/bin/mariadb-dump -u {database_entry['username']} -p{database_entry['password']} {database_entry['database']} > {mysqldump_destination_file}"
|
||||
execute_shell_command(database_backup_command)
|
||||
|
||||
def backup_postgres(container, databases, version_dir):
|
||||
"""Backup PostgreSQL database if applicable."""
|
||||
database_name = get_database_name(container)
|
||||
database_entry = databases.loc[databases['database'] == database_name].iloc[0]
|
||||
pg_dump_destination_dir = os.path.join(version_dir, "sql")
|
||||
pathlib.Path(pg_dump_destination_dir).mkdir(parents=True, exist_ok=True)
|
||||
pg_dump_destination_file = os.path.join(pg_dump_destination_dir, f"{database_name}_backup.sql")
|
||||
# Docker command to execute pg_dump and save the output on the host system
|
||||
database_backup_command = (
|
||||
f"docker exec -i {container} pg_dump -U {database_entry['username']} "
|
||||
f"-d {database_entry['database']} -h localhost "
|
||||
f"--no-password"
|
||||
)
|
||||
# Redirect the output of docker exec to a file on the host system
|
||||
full_command = f"PGPASSWORD={database_entry['password']} {database_backup_command} > {pg_dump_destination_file}"
|
||||
execute_shell_command(full_command)
|
||||
|
||||
|
||||
# OK
|
||||
def backup_volume(volume_name, version_dir):
|
||||
"""Backup files of a volume."""
|
||||
files_rsync_destination_path = os.path.join(version_dir, volume_name, "files")
|
||||
@ -53,6 +78,46 @@ def backup_volume(volume_name, version_dir):
|
||||
rsync_command = f"rsync -abP --delete --delete-excluded {source_dir} {files_rsync_destination_path}"
|
||||
execute_shell_command(rsync_command)
|
||||
|
||||
# OK
|
||||
def is_image(container,image):
|
||||
"""Check if the container is using a MariaDB image."""
|
||||
image_info = execute_shell_command(f"docker inspect {container} | jq -r '.[].Config.Image'")
|
||||
return image in image_info[0]
|
||||
|
||||
# OK
|
||||
def stop_containers(containers):
|
||||
"""Stop a list of containers."""
|
||||
for container in containers:
|
||||
print(f"Stopping container {container}...")
|
||||
execute_shell_command(f"docker stop {container}")
|
||||
# OK
|
||||
def start_containers(containers):
|
||||
"""Start a list of stopped containers."""
|
||||
for container in containers:
|
||||
print(f"Starting container {container}...")
|
||||
execute_shell_command(f"docker start {container}")
|
||||
|
||||
# OK
|
||||
def any_has_image(containers,image):
|
||||
for container in containers:
|
||||
if is_mariadb_container(container,image):
|
||||
return container
|
||||
return False
|
||||
|
||||
def is_whitelisted(container, images):
|
||||
"""Check if the container's image is one of the whitelisted images."""
|
||||
image_info = execute_shell_command(f"docker inspect {container} | jq -r '.[].Config.Image'")
|
||||
container_image = image_info[0]
|
||||
|
||||
for image in images:
|
||||
if image in container_image:
|
||||
return True
|
||||
return False
|
||||
|
||||
def is_any_not_whitelisted(containers, images):
|
||||
"""Check if any of the containers are using images that are not whitelisted."""
|
||||
return any(not is_whitelisted(container, images) for container in containers)
|
||||
|
||||
def main():
|
||||
print('Start backup routine...')
|
||||
dirname = os.path.dirname(__file__)
|
||||
@ -73,15 +138,29 @@ def main():
|
||||
print('Skipped due to no running containers using this volume.')
|
||||
continue
|
||||
|
||||
for container in containers:
|
||||
if container != 'akaunting':
|
||||
backup_database(container, databases, version_dir)
|
||||
mariadb_container = get_container_with_image(containers,'mariadb')
|
||||
if mariadb_container:
|
||||
print(f"Backup MariaDB database for container: {mariadb_container}")
|
||||
backup_mariaddb(mariadb_container, databases, version_dir)
|
||||
else:
|
||||
postgres_container = get_container_with_image(containers,'postgres')
|
||||
if postgres_container:
|
||||
print(f"Backup Postgres database for container: {postgres_container}")
|
||||
backup_postgres(postgres_container, databases, version_dir)
|
||||
# Data backup
|
||||
else:
|
||||
# Just copy without stopping
|
||||
backup_volume(volume_name, version_dir)
|
||||
# If container if not whitelisted stop and start container afterwards.
|
||||
if is_any_not_whitelisted(containers, []):
|
||||
stop_containers(containers)
|
||||
backup_volume(volume_name, version_dir)
|
||||
start_containers(containers)
|
||||
|
||||
print('Finished volume backups.')
|
||||
print('Restart docker service...')
|
||||
execute_shell_command("systemctl restart docker")
|
||||
print('Finished backup routine.')
|
||||
#print('Restart docker service...')
|
||||
#execute_shell_command("systemctl restart docker")
|
||||
#print('Finished backup routine.')
|
||||
|
||||
if __name__ == "__main__":
|
||||
main()
|
||||
|
Loading…
Reference in New Issue
Block a user