20 lines
670 B
Bash
20 lines
670 B
Bash
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#!/usr/bin/env bash
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# How many concurrent `docker exec` sessions does this host tolerate?
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# The Phew SLA checker's 5-way concurrency test failed with
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# "No such exec instance" + "failed to open stdin fifo", which points at an
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# exec-session ceiling rather than at the checker.
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set -uo pipefail
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C=${1:-phew_container_team1}
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N=${2:-8}
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echo "container: $C"
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echo "--- $N concurrent trivial execs ---"
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fail=0
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for i in $(seq 1 "$N"); do
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( out=$(docker exec "$C" true 2>&1); rc=$?
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if [ $rc -ne 0 ]; then echo " exec$i FAILED: $out"; fi ) &
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done
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wait
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echo "--- done ---"
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echo "dockerd max concurrent execs:"
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docker info 2>/dev/null | grep -iE 'exec|containerd' | head -3
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