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125 lines
2.8 KiB
Markdown
125 lines
2.8 KiB
Markdown
# Persistent and automatically update subscriptions
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[systemd.timer](https://www.freedesktop.org/software/systemd/man/latest/systemd.timer.html) allows you to run a service periodically.
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The current behavior of dae is to pull subscriptions at startup, but this can sometimes result in an empty group if there is a network anomaly or other possible reason when pulling subscriptions.
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We'll introduce a way to achieve persistent subscription storage and automatic subscription updates through the systemd service and timer.
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## Preparations
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### Shell script
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We assume that your dae configuration file is stored in `/usr/local/etc/dae/` .
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`/usr/local/bin/update-dae-subs.sh`:
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```sh
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#!/bin/bash
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# Change the path to suit your needs
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cd /usr/local/etc/dae || exit 1
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version="$(dae --version | head -n 1 | sed 's/dae version //')"
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UA="dae/${version} (like v2rayA/1.0 WebRequestHelper) (like v2rayN/1.0 WebRequestHelper)"
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fail=false
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while IFS=':' read -r name url
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do
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curl --retry 3 --retry-delay 5 -fL -A "$UA" "$url" -o "${name}.sub.new"
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if [[ $? -eq 0 ]]; then
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mv "${name}.sub.new" "${name}.sub"
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chmod 0600 "${name}.sub"
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echo "Downloaded $name"
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else
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if [ -f "${name}.sub.new" ]; then
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rm "${name}.sub.new"
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fi
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fail=true
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echo "Failed to download $name"
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fi
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done < sublist
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dae reload
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if $fail; then
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echo "Failed to update some subs"
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exit 2
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fi
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```
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You need to give it proper permission:
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```sh
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chmod +x /usr/local/bin/update-dae-subs.sh
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```
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### `systemd.timer` and `systemd.service`
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This timer will automatically update dae subscriptions every 12 hours, or 15 minutes after each boot.
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`/etc/systemd/system/update-subs.timer`:
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```systemd
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[Unit]
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Description=Auto-update dae subscriptions
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[Timer]
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OnBootSec=15min
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OnUnitActiveSec=12h
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[Install]
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WantedBy=timers.target
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```
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`/etc/systemd/system/update-subs.service`:
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```systemd
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[Unit]
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Description=Update dae subscriptions
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Wants=network-online.target
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After=network-online.target
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[Service]
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Type=oneshot
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ExecStart=/usr/local/bin/update-dae-subs.sh
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Restart=on-failure
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```
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## Configurations
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Put your subscription links into `/usr/local/etc/dae/sublist`:
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```text
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sub1:https://mysub1.com
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sub2:https://mysub2.com
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sub3:https://mysub3.com
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```
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Give the file appropriate permissions (for your privacy):
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```sh
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chmod 0600 /usr/local/etc/dae/sublist
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```
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Edit `config.dae`:
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```text
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subscription {
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# Add your subscription links here.
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sub1:'file://sub1.sub'
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sub2:'file://sub2.sub'
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sub3:'file://sub3.sub'
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}
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```
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## Enable timer
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Execute the following command:
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```sh
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systemctl enable --now update-dae-subs.timer
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# If you need to renew your subscription immediately or haven't pulled a subscription before
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systemctl start update-dae-subs.service
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```
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