module/logrotate/scheme.sh

#!/bin/bash
#
# logrotate - scheme
#
# Copyright 2019 Luigi Santivetti <luigi.santivetti@gmail.com>

# Permission is hereby granted, free of charge, to any person obtaining a
# copy of this software and associated documentation files (the "Software"),
# to deal in the Software without restriction, including without limitation
# the rights to use, copy, modify, merge, publish, distribute, sublicense,
# and/or sell copies of the Software, and to permit persons to whom the
# Software is furnished to do so, subject to the following conditions:

# The above copyright notice and this permission notice (including the next
# paragraph) shall be included in all copies or substantial portions of the
# Software.

# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
# ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
# IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
# CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

# Credits to:
#   https://github.com/linkyard/docker-logrotate

declare -r dockerfile_t="\
FROM alpine:3.10

RUN set -x \\
  && apk add --no-cache logrotate tini tzdata moreutils \\
  && rm /etc/logrotate.conf && rm -r /etc/logrotate.d \\
  && mv /etc/periodic/daily/logrotate /etc/.logrotate.cronjob

# Only missing uid and gid from alpine 3.10
RUN addgroup -g ${_LOGROTATE_OPENSSH_GID_} ${_LOGROTATE_OPENSSH_USER_} && \\
  adduser -H -D -u ${_LOGROTATE_OPENSSH_UID_} -G ${_LOGROTATE_OPENSSH_USER_} ${_LOGROTATE_OPENSSH_USER_}

COPY entrypoint.sh /entrypoint.sh

VOLUME [\"${_LOGROTATE_LOG_CON_D_}\"]

ENTRYPOINT [\"tini\", \"-g\", \"--\"]
CMD [\"/entrypoint.sh\"]"

declare -r logrotate_conf_t="\
${_LOGROTATE_APACHE_FILE_PATTERN_} {
  ${_LOGROTATE_TRUNCATE_}
  ${_LOGROTATE_COMPRESS_}
  rotate ${_LOGROTATE_ROTATE_}
  size ${_LOGROTATE_SIZE_}
}

${_LOGROTATE_MYSQL_FILE_PATTERN_} {
  ${_LOGROTATE_TRUNCATE_}
  ${_LOGROTATE_COMPRESS_}
  rotate ${_LOGROTATE_ROTATE_}
  size ${_LOGROTATE_SIZE_}
}

${_LOGROTATE_OPENSSH_FILE_PATTERN_} {
  ${_LOGROTATE_TRUNCATE_}
  ${_LOGROTATE_COMPRESS_}
  rotate ${_LOGROTATE_ROTATE_}
  size ${_LOGROTATE_SIZE_}
}"

declare -r entrypoint_bang_t="\
#!/bin/sh

TS_FORMAT=\"%Y-%m-%dT%H:%M:%S%z \"

if [ -e /etc/logrotate.conf ]; then
  echo \"Using mounted /etc/logrotate.conf:\" | ts \"\${TS_FORMAT}\"
else
  echo \"Using templated /etc/logrotate.conf:\" | ts \"\${TS_FORMAT}\"
  {
    echo \"\${LOGROTATE_FILE_PATTERN:-${_LOGROTATE_LOG_CON_D_}/*.log} {\"
    echo \"  \${LOGROTATE_TRUNCATE:-copytruncate}\"
    echo \"  \${LOGROTATE_COMPRESS:-nocompress}\"
    echo \"  rotate \${LOGROTATE_ROTATE:-5}\"
    echo \"  size \${LOGROTATE_SIZE:-5M}\"
    echo \"}\"
  } > /etc/logrotate.conf
fi
ts \"\${TS_FORMAT}\" < /etc/logrotate.conf

if [ -d \"/etc/periodic/\${LOGROTATE_CRON:-15min}\" ]; then
  echo \"using /etc/periodic/\${LOGROTATE_CRON:-15min} cron schedule\" | ts \"\${TS_FORMAT}\"
  mv /etc/.logrotate.cronjob \"/etc/periodic/\${LOGROTATE_CRON:-15min}/logrotate\"
else
  echo \"assuming \"\${LOGROTATE_CRON:-15min}\" is a cron expression; appending to root's crontab\" | ts \"\${TS_FORMAT}\"
  echo \"\${LOGROTATE_CRON:-15min} /etc/.logrotate.cronjob\" >> /var/spool/cron/crontabs/root
fi

# shellcheck disable=SC2086
exec crond -d \${CROND_LOGLEVEL:-7} -f 2>&1 | ts \"\${TS_FORMAT}\""