mirror of
https://github.com/ceph/ceph-csi.git
synced 2024-11-18 04:10:22 +00:00
4891e534d3
`bash -E` causes inheritance of the ERR trap into shell functions, command substitutions, and commands executed in a subshell environment. Because the `kubectl_retry` function depends on detection an error of a subshell, the ERR trap is not needed to be executed. The trap contains extra logging, and exits the script in the `rook.sh` case. The aborting of the script is not wanted when a retry is expected to be done. While checking for known failures, the `grep` command may exit with 1, if there are no matches. That means, the `ret` variable will be set to 0, but there will also be an error exit status. This causes `bash -E` to abort the function, and call the ERR trap. Signed-off-by: Niels de Vos <ndevos@redhat.com>
90 lines
3.3 KiB
Bash
Executable File
90 lines
3.3 KiB
Bash
Executable File
#!/bin/bash
|
|
|
|
KUBECTL_RETRY=5
|
|
KUBECTL_RETRY_DELAY=10
|
|
|
|
# kubectl_retry calls `kubectl` with the passed arguments. In case of a
|
|
# failure, the `kubectl` command will be retried for `KUBECTL_RETRY` times,
|
|
# with a delay of `KUBECTL_RETRY_DELAY` between them.
|
|
#
|
|
# Upon creation failures, `AlreadyExists` and `Warning` are ignored, making
|
|
# sure the create succeeds in case some objects were created successfully in a
|
|
# previous try.
|
|
#
|
|
# Upon deletion failures, the same applies as for creation, except that
|
|
# NotFound is ignored.
|
|
#
|
|
# Logs from `kubectl` are passed on to stdout, so that a calling function can
|
|
# capture it. During the function, logs are written to stderr as to not
|
|
# interfere with the log parsing of the calling function.
|
|
kubectl_retry() {
|
|
local retries=0 action="${1}" ret=0 stdout stderr
|
|
shift
|
|
|
|
# temporary files for kubectl output
|
|
stdout=$(mktemp rook-kubectl-stdout.XXXXXXXX)
|
|
stderr=$(mktemp rook-kubectl-stderr.XXXXXXXX)
|
|
|
|
while ! ( kubectl "${action}" "${@}" 2>"${stderr}" 1>>"${stdout}" )
|
|
do
|
|
# write logs to stderr and empty stderr (only)
|
|
cat "${stdout}" > /dev/stderr
|
|
cat "${stderr}" > /dev/stderr
|
|
echo "$(date): 'kubectl_retry ${action} ${*}' try #${retries} failed, checking errors" > /dev/stderr
|
|
|
|
# in case of a failure when running "create", ignore errors with "AlreadyExists"
|
|
if [ "${action}" == 'create' ]
|
|
then
|
|
# count lines in stderr that do not have "AlreadyExists" or "Warning"
|
|
ret=$(grep -cvw -e 'AlreadyExists' -e '^Warning:' "${stderr}" || true)
|
|
if [ "${ret}" -eq 0 ]
|
|
then
|
|
# Success! stderr is empty after removing all "AlreadyExists" lines.
|
|
echo "$(date): 'kubectl_retry ${action} ${*}' succeeded without unknown errors" > /dev/stderr
|
|
break
|
|
fi
|
|
fi
|
|
|
|
# in case of a failure when running "delete", ignore errors with "NotFound"
|
|
if [ "${action}" == 'delete' ]
|
|
then
|
|
# count lines in stderr that do not have "NotFound" or "Warning"
|
|
ret=$(grep -cvw -e 'NotFound' -e '^Warning:' "${stderr}" || true)
|
|
if [ "${ret}" -eq 0 ]
|
|
then
|
|
# Success! stderr is empty after removing all "NotFound" lines.
|
|
echo "$(date): 'kubectl_retry ${action} ${*}' succeeded without unknown errors" > /dev/stderr
|
|
break
|
|
fi
|
|
fi
|
|
|
|
retries=$((retries+1))
|
|
if [ ${retries} -eq ${KUBECTL_RETRY} ]
|
|
then
|
|
echo "$(date): 'kubectl_retry ${action} ${*}' failed, no more retries left (${retries}/${KUBECTL_RETRY})" > /dev/stderr
|
|
ret=1
|
|
break
|
|
fi
|
|
|
|
# empty stderr for the next loop
|
|
true > "${stderr}"
|
|
echo "$(date): 'kubectl_retry ${action} ${*}' failed (${retries}/${KUBECTL_RETRY}), will retry in ${KUBECTL_RETRY_DELAY} seconds" > /dev/stderr
|
|
|
|
sleep ${KUBECTL_RETRY_DELAY}
|
|
|
|
# reset ret so that a next working kubectl does not cause a non-zero
|
|
# return of the function
|
|
ret=0
|
|
done
|
|
|
|
echo "$(date): 'kubectl_retry ${action} ${*}' done (ret=${ret})" > /dev/stderr
|
|
|
|
# write output so that calling functions can consume it
|
|
cat "${stdout}" > /dev/stdout
|
|
cat "${stderr}" > /dev/stderr
|
|
|
|
rm -f "${stdout}" "${stderr}"
|
|
|
|
return ${ret}
|
|
}
|