51 lines
1.1 KiB
Bash
51 lines
1.1 KiB
Bash
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#!/bin/sh
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set -eu
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# Port allocation for zero-downtime deployments
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#
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# Reads remote state to determine next available port.
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# State files:
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# $base/$project/base_port - starting port number
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# $base/$project/releases/*/assigned_port - port for each release
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#
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# Algorithm:
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# 1. read base_port (default 3100)
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# 2. find all assigned_port files in releases/
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# 3. return smallest unused port >= base_port
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ssh=deploy-peoplesgrocers-website
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base=/home/peoplesgrocers
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project=salience
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ssh $ssh "
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set -eu
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base=$base
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project=$project
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test -d \$base/\$project || { echo 'project dir does not exist' >&2; exit 1; }
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# read or initialize base_port
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if test -f \$base/\$project/base_port; then
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base_port=\$(cat \$base/\$project/base_port)
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else
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base_port=3100
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echo \$base_port > \$base/\$project/base_port
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fi
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# find all assigned ports
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assigned=\$(find \$base/\$project/releases -name assigned_port -exec cat {} \; 2>/dev/null | sort -n || true)
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# find first unused port
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port=\$base_port
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while true; do
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found=0
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for p in \$assigned; do
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test \$p -eq \$port && { found=1; break; }
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done
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test \$found -eq 0 && break
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port=\$((port + 1))
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done
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echo \$port
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"
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