Re: [PATCH v2 2/2] post_pw: Store submitted checks locally as well

[Michael Santana <msantana@redhat.com>]

On Mon, Jan 22, 2024 at 2:32 PM Aaron Conole <aconole@redhat.com> wrote:
>
> Jeremy Kerr reports that our PW checks reporting submitted 43000 API calls
> in just a single day.  That is alarmingly unacceptable.  We can store the
> URLs we've already submitted and then just skip over any additional
> processing at least on the PW side.
>
> This patch does two things to try and mitigate this issue:
>
> 1. Store each patch ID and URL in the series DB to show that we reported
>    the check.  This means we don't need to poll patchwork for check status
>
> 2. Store the last modified time of the reports mailing list.  This means
>    we only poll the mailing list when a new email has surely landed.
>
> Signed-off-by: Aaron Conole <aconole@redhat.com>
> ---
> v2: fixed up the Last-Modified grep and storage
>
>  post_pw.sh       | 38 +++++++++++++++++++++++++++++++++++++-
>  series_db_lib.sh | 25 +++++++++++++++++++++++++
>  2 files changed, 62 insertions(+), 1 deletion(-)
>
> diff --git a/post_pw.sh b/post_pw.sh
> index 9163ea1..a23bdc5 100755
> --- a/post_pw.sh
> +++ b/post_pw.sh
> @@ -20,6 +20,7 @@
>  # License for the specific language governing permissions and limitations
>  # under the License.
>
> +[ -f "$(dirname $0)/series_db_lib.sh" ] && source "$(dirname $0)/series_db_lib.sh" || exit 1
>  [ -f "${HOME}/.mail_patchwork_sync.rc" ] && source "${HOME}/.mail_patchwork_sync.rc"
>
>  # Patchwork instance to update with new reports from mailing list
> @@ -75,6 +76,13 @@ send_post() {
>      if [ -z "$context" -o -z "$state" -o -z "$description" -o -z "$patch_id" ]; then
>          echo "Skpping \"$link\" due to missing context, state, description," \
>               "or patch_id" 1>&2
> +        # Just don't want to even bother seeing these "bad" patches as well.
> +        add_check_scanned_url "$patch_id" "$target_url"
> +        return 0
> +    fi
> +
> +    if check_id_exists "$patch_id" "$target_url" ; then
> +        echo "Skipping \"$link\" - already reported." 1>&2
>          return 0
>      fi
>
> @@ -84,6 +92,7 @@ send_post() {
>          "$api_url")"
>      if [ $? -ne 0 ]; then
>          echo "Failed to get proper server response on link ${api_url}" 1>&2
> +        # Don't store these as processed in case the server has a temporary issue.
>          return 0
>      fi
>
> @@ -95,6 +104,9 @@ send_post() {
>      jq -e "[.[].target_url] | contains([\"$mail_url\"])" >/dev/null
>      then
>          echo "Report ${target_url} already pushed to patchwork. Skipping." 1>&2
> +        # Somehow this was not stored (for example, first time we apply the tracking
> +        # feature).  Store it now.
> +        add_check_scanned_url "$patch_id" "$target_url"
>          return 0
>      fi
>
> @@ -114,12 +126,34 @@ send_post() {
>      if [ $? -ne 0 ]; then
>          echo -e "Failed to push retults based on report ${link} to the"\
>                  "patchwork instance ${pw_instance} using the following REST"\
> -                "API Endpoint ${api_url} with the following data:\n$data\n"
> +                "API Endpoint ${api_url} with the following data:\n$data\n" 1>&2
>          return 0
>      fi
> +
> +    add_check_scanned_url "$patch_id" "$target_url"
>  }
>
> +# Collect the date.  NOTE: this needs some accomodate to catch the month change-overs
>  year_month="$(date +"%Y-%B")"
> +
> +# Get the last modified time
> +report_last_mod=$(curl --head -A "(pw-ci) pw-post" -sSf "${mail_archive}${year_month}/thread.html" | grep -i Last-Modified)
> +
> +mailing_list_save_file=$(echo ".post_pw_${mail_archive}${year_month}" | sed -e "s@/@_@g" -e "s@:@_@g" -e "s,@,_,g")
> +
> +if [ -e "${HOME}/${mailing_list_save_file}" ]; then
> +    last_read_date=$(cat "${HOME}/${mailing_list_save_file}")
> +    if [ "$last_read_date" -a "$last_read_date" == "$report_last_mod" ]; then
> +        echo "Last modified times match.  Skipping list parsing."
> +        exit 0
> +    else
> +        last_read_date="$report_last_mod"
> +    fi
> +else
> +    last_read_date="Failed curl."
> +    touch "${HOME}/${mailing_list_save_file}"
One last thing, sorry

Instead of touch, could we propagate with $report_last_mod ?
Im looking at it from the POV the first time this script is run and
the file does not exist, it creates the timestamp. Next time it runs,
if the timestamps are the same the script exits, which is what we
want. If we keep it as its written, the second time the script runs
the variable will be propagated with "Failed curl" and the script will
run fully. This might not be ideal if the timestamps match but just
not yet propagated on the file

or maybe another last_read_date="$report_last_mod" might do the job

Otherwise, everything looks good!

> +fi
> +
>  reports="$(curl -A "(pw-ci) pw-post" -sSf "${mail_archive}${year_month}/thread.html" | \
>           grep -i 'HREF=' | sed -e 's@[0-9]*<LI><A HREF="@\|@' -e 's@">@\|@')"
>  if [ $? -ne 0 ]; then
> @@ -132,3 +166,5 @@ echo "$reports" | while IFS='|' read -r blank link title; do
>          send_post "${mail_archive}${year_month}/$link"
>      fi
>  done
> +
> +echo "$last_read_date" > "${HOME}/${mailing_list_save_file}"
> diff --git a/series_db_lib.sh b/series_db_lib.sh
> index c5f42e0..0635469 100644
> --- a/series_db_lib.sh
> +++ b/series_db_lib.sh
> @@ -130,6 +130,17 @@ recheck_sync INTEGER
>  EOF
>          run_db_command "INSERT INTO series_schema_version(id) values (8);"
>      fi
> +
> +    run_db_command "select * from series_schema_version;" | egrep '^9$' > /dev/null 2>&1
> +    if [ $? -eq 1 ]; then
> +        sqlite3 ${HOME}/.series-db <<EOF
> +CREATE TABLE check_id_scanned (
> +check_patch_id INTEGER,
> +check_url STRING
> +)
> +EOF
> +        run_db_command "INSERT INTO series_schema_version(id) values (9);"
> +    fi
>  }
>
>  function series_db_exists() {
> @@ -468,3 +479,17 @@ function set_recheck_request_state() {
>
>      echo "UPDATE recheck_requests set recheck_sync=$recheck_state where patchwork_instance=\"$recheck_instance\" and patchwork_project=\"$recheck_project\" and recheck_requested_by=\"$recheck_requested_by\" and recheck_series=\"$recheck_series\";" | series_db_execute
>  }
> +
> +function add_check_scanned_url() {
> +    local patch_id="$1"
> +    local url="$2"
> +
> +    echo "INSERT into check_id_scanned (check_patch_id, check_url) values (${patch_id}, \"$url\");" | series_db_execute
> +}
> +
> +function check_id_exists() {
> +    local patch_id="$1"
> +    local url="$2"
> +
> +    echo "select * from check_id_scanned where check_patch_id=$patch_id and check_url=\"$url\";" | series_db_execute | grep "$url" >/dev/null 2>&1
> +}
> --
> 2.41.0
>