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docs/k8s: make run.sh handle SIGINT

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It was previously using jobcontrol to achieve this, but that apparently
doesn't work when there is no tty. This makes it so that it directly
handles SIGINT and SIGTERM and passes it on to tailscaled. I tested this
works on a Digital Ocean K8s cluster.

Fixes #5512

Signed-off-by: Maisem Ali <maisem@tailscale.com>
This commit is contained in:
Maisem Ali 2022-09-04 15:27:13 -07:00 committed by Maisem Ali
parent 02de34fb10
commit 060ecb010f
1 changed files with 10 additions and 3 deletions
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13
docs/k8s/run.sh
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@ -4,8 +4,6 @@
#! /bin/sh
set -m # enable job control
export PATH=$PATH:/tailscale/bin
TS_AUTH_KEY="${TS_AUTH_KEY:-}"
@ -60,8 +58,16 @@ if [[ ! -z "${TS_TAILSCALED_EXTRA_ARGS}" ]]; then
TAILSCALED_ARGS="${TAILSCALED_ARGS} ${TS_TAILSCALED_EXTRA_ARGS}"
fi
handler() {
echo "Caught SIGINT/SIGTERM, shutting down tailscaled"
kill -s SIGINT $PID
wait ${PID}
}
echo "Starting tailscaled"
tailscaled ${TAILSCALED_ARGS} &
PID=$!
trap handler SIGINT SIGTERM
UP_ARGS="--accept-dns=${TS_ACCEPT_DNS}"
if [[ ! -z "${TS_ROUTES}" ]]; then
@ -82,4 +88,5 @@ if [[ ! -z "${TS_DEST_IP}" ]]; then
iptables -t nat -I PREROUTING -d "$(tailscale --socket=/tmp/tailscaled.sock ip -4)" -j DNAT --to-destination "${TS_DEST_IP}"
fi
fg
echo "Waiting for tailscaled to exit"
wait ${PID}