https://github.com/eriksjolund/systemd-restart-service-fdstore

Example systemd user service that uses FDSTORE=1
https://github.com/eriksjolund/systemd-restart-service-fdstore

container demo podman socket-activation systemd-service

Last synced: about 1 month ago
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Example systemd user service that uses FDSTORE=1

• Host: GitHub
• URL: https://github.com/eriksjolund/systemd-restart-service-fdstore
• Owner: eriksjolund
• License: mit
• Created: 2022-03-20T09:40:28.000Z (almost 3 years ago)
• Default Branch: main
• Last Pushed: 2022-03-20T16:27:48.000Z (almost 3 years ago)
• Last Synced: 2024-10-31T17:45:15.134Z (3 months ago)
• Topics: container, demo, podman, socket-activation, systemd-service
• Language: C
• Homepage:
• Size: 9.77 KB
• Stars: 1
• Watchers: 2
• Forks: 0
• Open Issues: 1
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

        
# systemd-restart-service-fdstore

Example systemd user service that uses FDSTORE=1

**Status**:

Running on the host works ([email protected]). Running in a container with Podman fails ([email protected]).

See https://github.com/eriksjolund/systemd-restart-service-fdstore/issues/1.

# Installation

```

git clone URL

cd systemd-restart-service-fdstore

gcc -o /tmp/server server_fdstore.c -l systemd

mkdir -p ~/.config/systemd/user

cp [email protected] ~/.config/systemd/user

cp [email protected]  ~/.config/systemd/user

systemctl --user daemon-reload

Systemctl --user start [email protected]

```

# Usage

```

$ socat readline tcp4:127.0.0.1:3010

aaaaa

AAAAA

bbb

BBB

ccc

CCC

dddd

DDDD

eeeeeee

EEEEEEE

fffffff

FFFFFFF

```

The systemd user service  [email protected] calls `exit(EXIT_FAILURE)` every nth time (n=3) it receives a string.

systemd will then pass the previously stored accepted TCP socket when restarting the service.

The client will not notice the restart because the TCP connections stays active.

In another shell run

```

journalctl  --user -xe -u [email protected]

```

to see the restarts happening.