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Allow setting sensible variables via files

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This commit is contained in:
Jonathan Senecal 2018-09-13 11:27:57 -04:00
parent 6e032f3a81
commit a38d043401
1 changed files with 30 additions and 2 deletions
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32
entrypoint.sh
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@ -13,17 +13,39 @@ UPLOAD_MAX_SIZE=${UPLOAD_MAX_SIZE:-"16M"}
OPCACHE_MEM_SIZE=${OPCACHE_MEM_SIZE:-"128"}
LIBRENMS_POLLER_THREADS=${LIBRENMS_POLLER_THREADS:-"16"}
LIBRENMS_SNMP_COMMUNITY=${LIBRENMS_SNMP_COMMUNITY:-"librenmsdocker"}
DB_PORT=${DB_PORT:-"3306"}
DB_NAME=${DB_NAME:-"librenms"}
DB_USER=${DB_USER:-"librenms"}
DB_PASSWORD=${DB_PASSWORD:-"asupersecretpassword"}
MEMCACHED_PORT=${MEMCACHED_PORT:-"11211"}
RRDCACHED_PORT=${RRDCACHED_PORT:-"42217"}
# From https://github.com/docker-library/mariadb/blob/master/docker-entrypoint.sh
# usage: file_env VAR [DEFAULT]
# ie: file_env 'XYZ_DB_PASSWORD' 'example'
# (will allow for "$XYZ_DB_PASSWORD_FILE" to fill in the value of
# "$XYZ_DB_PASSWORD" from a file, especially for Docker's secrets feature)
file_env() {
local var="$1"
local fileVar="${var}_FILE"
local def="${2:-}"
if [ "${!var:-}" ] && [ "${!fileVar:-}" ]; then
echo >&2 "error: both $var and $fileVar are set (but are exclusive)"
exit 1
fi
local val="$def"
if [ "${!var:-}" ]; then
val="${!var}"
elif [ "${!fileVar:-}" ]; then
val="$(< "${!fileVar}")"
fi
export "$var"="$val"
unset "$fileVar"
}
# Timezone
echo "Setting timezone to ${TZ}..."
ln -snf /usr/share/zoneinfo/${TZ} /etc/localtime
@ -57,6 +79,7 @@ sed -e "s/@UPLOAD_MAX_SIZE@/$UPLOAD_MAX_SIZE/g" \
# SNMP
echo "Updating SNMP community..."
file_env 'LIBRENMS_SNMP_COMMUNITY' 'librenmsdocker'
sed -i -e "s/RANDOMSTRINGGOESHERE/${LIBRENMS_SNMP_COMMUNITY}/" /etc/snmp/snmpd.conf
# Init files and folders
@ -81,6 +104,11 @@ if [ -z "$DB_HOST" ]; then
>&2 echo "ERROR: DB_HOST must be defined"
exit 1
fi
file_env 'DB_PASSWORD'
if [ -z "$DB_PASSWORD" ]; then
>&2 echo "ERROR: Either DB_PASSWORD or DB_PASSWORD_FILE must be defined"
exit 1
fi
cat > ${LIBRENMS_PATH}/config.d/database.php <<EOL
<?php
\$config['db_host'] = '${DB_HOST}';