运行 docker-compose 的 Linux At 命令

Question

Goal: I am trying to schedule a 'docker-compose up' at a scheduled time

Operating System: Linux Ubuntu 18.04

I have tried using the 'at' command in linux but I am trying to set variables and couldn't get it to quite work.

Attempts below:

sudo echo "KEY='VALUE' DIRECTION='D' sh run.sh" | at now + 2 minute
# Above does not run the docker-compose

sudo echo "KEY='VALUE' DIRECTION='D' sh run.sh" | at now + 2 minute
# Above runs docker-compose command immediately but not in 2 minutes

# run.sh

# SET LOGFILE LOCATION
LOG_FILE="/var/log/at/test.log"

FLIGHT_FILE="flight.yaml" docker-compose up --abort-on-container-exit >> "${LOG_FILE}"

If there is a better way than using the 'at' command I am also open to that.

Thank you in advance

Answer 1

in your example (both attempts are the same) only the echo is executed by sudo , at is executed as your user.

options:

run the script on the root's at queue:

sudo sh -c "echo \"KEY='VALUE' DIRECTION='D' sh /home/user/run.sh \" | at now + 1 min"

make at run sudo - works only if you have sudo setup not to ask a password:

echo "sudo sh -c \"KEY='VALUE' DIRECTION='D' /home/user/run.sh\"" | at now + 2 min

configure docker so you don't need sudo

Answer 2

There are 2 possible approaches -

Single file-

Create a file /etc/systemd/system/dc-test.service

[Unit]
Description=My Docker Compose runner

[Service]
User=%I
Restart=always
RestartSec=600s
ExecStart=/bin/bash /home/user/run.sh

Above will run the script ever 600 seconds.

Multi File (with service timers)

You need to create two files, one for service, other for timer with same name.

example:

/etc/systemd/system/dc-test.service

[Unit]
Description=My Docker Compose runner

[Service]
Type=oneshot
ExecStart=/bin/bash /home/user/run.sh

/etc/systemd/system/dc-test.timer

[Unit]
Description=Docker Compose Timer

[Timer]
OnUnitActiveSec=600s
OnBootSec=600s

[Install]
WantedBy=timers.target

In both the approaches you will need to run systemctl daemon-reload after you are done creating files.