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05a2c7ae3c
Add a shell helper function to wait for some command to succeed - typically a test for something to be done by a background process. Use it in the context code which waits for the guest to respond to ssh-over-vsock connections. Signed-off-by: David Gibson <david@gibson.dropbear.id.au> Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
127 lines
3.4 KiB
Bash
127 lines
3.4 KiB
Bash
#! /bin/sh
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#
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# SPDX-License-Identifier: AGPL-3.0-or-later
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#
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# PASST - Plug A Simple Socket Transport
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# for qemu/UNIX domain socket mode
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#
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# PASTA - Pack A Subtle Tap Abstraction
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# for network namespace/tap device mode
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#
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# test/lib/context - Run commands in different contexts (host, guest, namespace etc.)
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#
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# Copyright Red Hat
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# Author: David Gibson <david@gibson.dropbear.id.au>
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# context_setup_common() - Create outline of a new context
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# $1: Context name
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context_setup_common() {
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__name="$1"
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__log="${LOGDIR}/context_${__name}.log"
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echo -n "${__name}$ " > "${__log}"
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}
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# context_setup_host() - Create a new context for running commands on the host
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# $1: Context name
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context_setup_host() {
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__name="$1"
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__enter="${STATESETUP}/context_${__name}.enter"
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context_setup_common "${__name}"
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echo sh -c > "${__enter}"
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}
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# context_setup_nsenter() - Create a new context for running commands in a namespace
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# $1: Context name
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# $2: Namespace PID
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context_setup_nsenter() {
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__name="$1"
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shift
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__enter="${STATESETUP}/context_${__name}.enter"
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context_setup_common "${__name}"
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echo "nsenter $@ sh -c" > "${__enter}"
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}
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# context_setup_guest() - Create a new context for running commands in a guest
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# $1: Context name
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# $2: CID to use for vsock
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context_setup_guest() {
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__name="$1"
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__cid="$2"
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__enter="${STATESETUP}/context_${__name}.enter"
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__ssh="${STATESETUP}/context_${__name}.ssh"
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context_setup_common "${__name}"
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cat > "${__ssh}" <<EOF
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Host ${__name}
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User root
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UserKnownHostsFile ${STATESETUP}/context_${__name}.hosts
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StrictHostKeyChecking no
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IdentityFile ${BASEPATH}/guest-key
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IdentityAgent none
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ProxyCommand socat - VSOCK-CONNECT:${__cid}:22
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EOF
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echo "ssh -F ${__ssh} ${__name}" > "${__enter}"
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# Wait for the guest to be booted and accepting connections
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wait_for ssh -F "${__ssh}" "${__name}" :
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}
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# context_teardown() - Remove a context (leave log files intact)
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# $1: Context name
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context_teardown() {
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__name="$1"
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__prefix="${STATESETUP}/context_${__name}"
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rm -f "${__prefix}.enter" "${__prefix}.ssh" "${__prefix}.hosts"
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}
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# context_exists() - Test if a context currently exists
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# $1: Context name
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context_exists() {
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__name="$1"
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__enter="${STATESETUP}/context_${__name}.enter"
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[ -f "${__enter}" ]
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}
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# context_run() - Run a shell command in a context, and wait for it to finish
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# $1: Context name
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# $*: Command to start
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context_run() {
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__name="$1"
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__log="${LOGDIR}/context_${__name}.log"
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__enter="${STATESETUP}/context_${__name}.enter"
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__stdout="${STATESETUP}/context_${__name}.stdout"
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__stderr="${STATESETUP}/context_${__name}.stderr"
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shift
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echo "$*" >> "${__log}"
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mkfifo "${__stdout}" "${__stderr}"
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tee -a "${__log}" < "${__stdout}" &
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tee -a "${__log}" < "${__stderr}" >&2 &
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$(cat ${__enter}) "$*" >> "${__stdout}" 2>> "${__stderr}"
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rc=$?
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rm "${__stdout}" "${__stderr}"
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[ ${DEBUG} -eq 1 ] && echo "[Exit code: $rc]" >> "${__log}"
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echo -n "${__name}$ " >> "${__log}"
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return $rc
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}
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# context_run_bg() - Start a shell command in a context
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# $1: Context name
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# $*: Command to start
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context_run_bg() {
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__name="$1"
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__pidfile="${STATESETUP}/context_${__name}.pid"
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context_run "$@" &
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echo $! > "${__pidfile}"
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}
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# context_wait() - Wait for background command in a context to complete
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# $1: Context name
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# Returns the status of the completed command
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context_wait() {
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__name="$1"
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__pidfile="${STATESETUP}/context_${__name}.pid"
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__pid=$(cat "${__pidfile}")
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rm "${__pidfile}"
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wait ${__pid}
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}
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