ci-operator/step-registry/ipi: Shuffle installer log gathering

A few changes here:

* Background the 'destroy cluster' call and add a trap, so we can
  gracefully handle TERM.  More on this in 4472ace
  (ci-operator/templates/openshift/installer: Restore backgrounded
  'create cluster', 2019-01-23, openshift#2680).

* The 'set +e' and related wrapping around the 'wait' follows
  de3de20 (step-registry: add configure and install IPI steps,
  2020-01-14, openshift#6708), and ensures we gather logs and other assets in
  the event of a failed openshift-install invocation.  More on this
  below.

* We considered piping the installer's stderr into /dev/null.  The
  same information is going to show up in .openshift_install.log, and
  .openshift_install.log includes timestamps which are not present in
  the container's captured standard streams.  By using /dev/null, we
  could DRY up our password redaction, but we really want installer
  output to end up in the build log [1], so keeping the grep business
  there (even though that means we end up with largely duplicated
  assets between the container stderr and .openshift_install.log).

* Quote $?.  It's never going to contain shell-sensitive characters,
  but neither is $! and we quote that.

* Make the log copy the first thing that happens after the installer
  exits.  This ensures we capture the logs even if the installer fails
  before creating a kubeconfig or metadata.json.

* Shift the log-bundle copy earlier, because it cannot fail, while the
  SHARED_DIR copy might fail.  Although I'm not sure we have a case
  where we'd generate a log bundle but not generate the kubeconfig and
  metadata.json.

Testing the 'set +e' approach, just to make sure it works as expected:

  $ echo $BASH_VERSION
  5.0.11(1)-release
  $ cat test.sh
  #!/bin/bash

  set -o nounset
  set -o errexit
  set -o pipefail

  trap 'CHILDREN=$(jobs -p); if test -n "${CHILDREN}"; then kill ${CHILDREN} && wait; fi; echo "done cleanup"' TERM

  "${@}" &

  set +e
  wait "$!"
  ret="$?"
  set -e

  echo gather logs
  exit "$ret"
  $ ./test.sh sleep 600 &
  [2] 19397
  $ kill 19397
  done cleanup
  gather logs

  [2]-  Exit 143                ./test.sh sleep 20
  $ ./test.sh true
  gather logs
  $ echo $?
  0
  $ ./test.sh false
  gather logs
  $ echo $?
  1

So that all looks good.

[1]: openshift#7936 (comment)

ci-operator/step-registry/ipi/deprovision/deprovision/ipi-deprovision-deprovision-commands.sh

@@ -4,11 +4,21 @@ set -o nounset
 set -o errexit
 set -o pipefail
 
+trap 'CHILDREN=$(jobs -p); if test -n "${CHILDREN}"; then kill ${CHILDREN} && wait; fi' TERM
+
 cluster_profile=/var/run/secrets/ci.openshift.io/cluster-profile
 export AWS_SHARED_CREDENTIALS_FILE=$cluster_profile/.awscred
 export AZURE_AUTH_LOCATION=$cluster_profile/osServicePrincipal.json
 
 echo "Deprovisioning cluster ..."
 cp -ar "${SHARED_DIR}" /tmp/installer
-openshift-install --dir /tmp/installer destroy cluster
-cp /tmp/installer/.openshift_install.log "${ARTIFACT_DIR}/"
+openshift-install --dir /tmp/installer destroy cluster &
+
+set +e
+wait "$!"
+ret="$?"
+set -e
+
+cp /tmp/installer/.openshift_install.log "${ARTIFACT_DIR}"
+
+exit "$ret"

ci-operator/step-registry/ipi/install/install/ipi-install-install-commands.sh

@@ -39,13 +39,13 @@ TF_LOG=debug openshift-install --dir="${dir}" create cluster 2>&1 | grep --line-
 
 set +e
 wait "$!"
-ret=$?
+ret="$?"
 set -e
 
+sed 's/password: .*/password: REDACTED/' "${dir}/.openshift_install.log" >"${ARTIFACT_DIR}/.openshift_install.log"
+cp "${dir}"/log-bundle-*.tar.gz "${ARTIFACT_DIR}/" 2>/dev/null || :
 cp \
     -t "${SHARED_DIR}" \
     "${dir}/auth/kubeconfig" \
     "${dir}/metadata.json"
-cp "${dir}/.openshift_install.log" "${ARTIFACT_DIR}/"
-cp "${dir}"/log-bundle-*.tar.gz "${ARTIFACT_DIR}/" 2>/dev/null || :
 exit "$ret"