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Tobias Waldekranz
b9907fa7ae
When a test starts an isolated MACVLAN namespace, it is often useful
to interactively join that namespace to investigate issues. To do
this, we need to find the "sleeper" process backing the namespace, and
`nsenter` into that process's network namespace.
Add a script that automates this process.
To start a shell in the netns of the MACVLAN stacked on top of d1b,
start a shell in the test environment:
infix/test $ ./shell
13:37:00 infamy0:test # ./nsenter d1b
13:37:01 infamy0(netns:d1b):test #
25 lines
588 B
Bash
Executable File
25 lines
588 B
Bash
Executable File
#!/bin/sh
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set -e
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testdir=$(dirname "$(readlink -f "$0")")
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. "$testdir/.env"
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lower=$1
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shift
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[ $# -gt 0 ] || set sh
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for pid in $(pgrep -fx "sleep infinity"); do
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ifidxs=$(nsenter -t $pid -U -n ip -j link show | \
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jq '.[] | select(has("link_netnsid")) | .link_index')
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for ifidx in $ifidxs; do
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ifname=$(ip -j link show | jq -r ".[] | select(.ifindex == $ifidx) | .ifname")
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if [ "$ifname" = "$lower" ]; then
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exec nsenter -t $pid -U -n env PS1="$(build_ps1 "(netns:$ifname)")" "$@"
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fi
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done
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done
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echo Found no namespace with interface stacked on $lower >&2
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exit 1
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