408 lines
12 KiB
Bash
Executable File
408 lines
12 KiB
Bash
Executable File
#!/bin/bash
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set -eu
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# usage: file_env VAR [DEFAULT]
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# ie: file_env 'XYZ_DB_PASSWORD' 'example'
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# (will allow for "$XYZ_DB_PASSWORD_FILE" to fill in the value of
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# "$XYZ_DB_PASSWORD" from a file, especially for Docker's secrets feature)
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file_env() {
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local var="$1"
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local fileVar="${var}_FILE"
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local def="${2:-}"
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if [ "${!var:-}" ] && [ "${!fileVar:-}" ]; then
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echo >&2 "error: both $var and $fileVar are set (but are exclusive)"
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exit 1
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fi
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local val="$def"
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if [ "${!var:-}" ]; then
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val="${!var}"
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elif [ "${!fileVar:-}" ]; then
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val="$(< "${!fileVar}")"
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fi
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export "$var"="$val"
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unset "$fileVar"
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}
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# backwards compatibility for old environment variables
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: "${RABBITMQ_SSL_CERTFILE:=${RABBITMQ_SSL_CERT_FILE:-}}"
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: "${RABBITMQ_SSL_KEYFILE:=${RABBITMQ_SSL_KEY_FILE:-}}"
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: "${RABBITMQ_SSL_CACERTFILE:=${RABBITMQ_SSL_CA_FILE:-}}"
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# "management" SSL config should default to using the same certs
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: "${RABBITMQ_MANAGEMENT_SSL_CACERTFILE:=$RABBITMQ_SSL_CACERTFILE}"
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: "${RABBITMQ_MANAGEMENT_SSL_CERTFILE:=$RABBITMQ_SSL_CERTFILE}"
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: "${RABBITMQ_MANAGEMENT_SSL_KEYFILE:=$RABBITMQ_SSL_KEYFILE}"
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# Allowed env vars that will be read from mounted files (i.e. Docker Secrets):
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fileEnvKeys=(
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default_user
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default_pass
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)
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# https://www.rabbitmq.com/configure.html
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sslConfigKeys=(
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cacertfile
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certfile
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depth
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fail_if_no_peer_cert
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keyfile
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verify
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)
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managementConfigKeys=(
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"${sslConfigKeys[@]/#/ssl_}"
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)
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rabbitConfigKeys=(
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default_pass
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default_user
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default_vhost
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vm_memory_high_watermark
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)
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fileConfigKeys=(
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management_ssl_cacertfile
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management_ssl_certfile
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management_ssl_keyfile
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ssl_cacertfile
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ssl_certfile
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ssl_keyfile
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)
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allConfigKeys=(
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"${managementConfigKeys[@]/#/management_}"
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"${rabbitConfigKeys[@]}"
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"${sslConfigKeys[@]/#/ssl_}"
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)
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declare -A configDefaults=(
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[management_ssl_fail_if_no_peer_cert]='false'
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[management_ssl_verify]='verify_none'
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[ssl_fail_if_no_peer_cert]='true'
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[ssl_verify]='verify_peer'
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)
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# allow the container to be started with `--user`
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if [[ "$1" == rabbitmq* ]] && [ "$(id -u)" = '0' ]; then
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# this needs to happen late enough that we have the SSL config
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# https://github.com/docker-library/rabbitmq/issues/283
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for conf in "${allConfigKeys[@]}"; do
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var="RABBITMQ_${conf^^}"
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val="${!var:-}"
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[ -n "$val" ] || continue
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case "$conf" in
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*_ssl_*file | ssl_*file )
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if [ -f "$val" ] && ! gosu rabbitmq test -r "$val"; then
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newFile="/tmp/rabbitmq-ssl/$conf.pem"
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echo >&2
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echo >&2 "WARNING: '$val' ($var) is not readable by rabbitmq ($(id rabbitmq)); copying to '$newFile'"
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echo >&2
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cat "$val" > "$newFile"
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chown rabbitmq "$newFile"
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chmod 0400 "$newFile"
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eval 'export '$var'="$newFile"'
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fi
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;;
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esac
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done
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if [ "$1" = 'rabbitmq-server' ]; then
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find /var/lib/rabbitmq \! -user rabbitmq -exec chown rabbitmq '{}' +
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fi
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exec gosu rabbitmq "$BASH_SOURCE" "$@"
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fi
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haveConfig=
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haveSslConfig=
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haveManagementSslConfig=
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for fileEnvKey in "${fileEnvKeys[@]}"; do file_env "RABBITMQ_${fileEnvKey^^}"; done
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for conf in "${allConfigKeys[@]}"; do
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var="RABBITMQ_${conf^^}"
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val="${!var:-}"
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if [ "$val" ]; then
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if [ "${configDefaults[$conf]:-}" ] && [ "${configDefaults[$conf]}" = "$val" ]; then
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# if the value set is the same as the default, treat it as if it isn't set
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continue
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fi
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haveConfig=1
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case "$conf" in
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ssl_*) haveSslConfig=1 ;;
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management_ssl_*) haveManagementSslConfig=1 ;;
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esac
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fi
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done
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if [ "$haveSslConfig" ]; then
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missing=()
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for sslConf in cacertfile certfile keyfile; do
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var="RABBITMQ_SSL_${sslConf^^}"
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val="${!var}"
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if [ -z "$val" ]; then
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missing+=( "$var" )
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fi
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done
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if [ "${#missing[@]}" -gt 0 ]; then
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{
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echo
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echo 'error: SSL requested, but missing required configuration'
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for miss in "${missing[@]}"; do
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echo " - $miss"
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done
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echo
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} >&2
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exit 1
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fi
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fi
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missingFiles=()
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for conf in "${fileConfigKeys[@]}"; do
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var="RABBITMQ_${conf^^}"
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val="${!var}"
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if [ "$val" ] && [ ! -f "$val" ]; then
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missingFiles+=( "$val ($var)" )
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fi
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done
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if [ "${#missingFiles[@]}" -gt 0 ]; then
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{
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echo
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echo 'error: files specified, but missing'
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for miss in "${missingFiles[@]}"; do
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echo " - $miss"
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done
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echo
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} >&2
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exit 1
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fi
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# set defaults for missing values (but only after we're done with all our checking so we don't throw any of that off)
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for conf in "${!configDefaults[@]}"; do
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default="${configDefaults[$conf]}"
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var="RABBITMQ_${conf^^}"
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[ -z "${!var:-}" ] || continue
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eval "export $var=\"\$default\""
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done
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# if long and short hostnames are not the same, use long hostnames
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if [ "$(hostname)" != "$(hostname -s)" ]; then
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: "${RABBITMQ_USE_LONGNAME:=true}"
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fi
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if [ "${RABBITMQ_ERLANG_COOKIE:-}" ]; then
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cookieFile='/var/lib/rabbitmq/.erlang.cookie'
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if [ -e "$cookieFile" ]; then
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if [ "$(cat "$cookieFile" 2>/dev/null)" != "$RABBITMQ_ERLANG_COOKIE" ]; then
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echo >&2
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echo >&2 "warning: $cookieFile contents do not match RABBITMQ_ERLANG_COOKIE"
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echo >&2
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fi
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else
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echo "$RABBITMQ_ERLANG_COOKIE" > "$cookieFile"
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fi
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chmod 600 "$cookieFile"
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fi
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configBase="${RABBITMQ_CONFIG_FILE:-/etc/rabbitmq/rabbitmq}"
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oldConfigFile="$configBase.config"
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newConfigFile="$configBase.conf"
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shouldWriteConfig="$haveConfig"
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if [ -n "$shouldWriteConfig" ] && [ -f "$oldConfigFile" ]; then
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{
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echo "error: Docker configuration environment variables specified, but old-style (Erlang syntax) configuration file '$oldConfigFile' exists"
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echo " Suggested fixes: (choose one)"
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echo " - remove '$oldConfigFile'"
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echo " - remove any Docker-specific 'RABBITMQ_...' environment variables"
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echo " - convert '$oldConfigFile' to the newer sysctl format ('$newConfigFile'); see https://www.rabbitmq.com/configure.html#config-file"
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} >&2
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exit 1
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fi
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if [ -z "$shouldWriteConfig" ] && [ ! -f "$oldConfigFile" ] && [ ! -f "$newConfigFile" ]; then
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# no config files, we should write one
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shouldWriteConfig=1
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fi
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# http://stackoverflow.com/a/2705678/433558
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sed_escape_lhs() {
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echo "$@" | sed -e 's/[]\/$*.^|[]/\\&/g'
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}
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sed_escape_rhs() {
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echo "$@" | sed -e 's/[\/&]/\\&/g'
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}
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rabbit_set_config() {
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local key="$1"; shift
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local val="$1"; shift
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[ -e "$newConfigFile" ] || touch "$newConfigFile"
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local sedKey="$(sed_escape_lhs "$key")"
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local sedVal="$(sed_escape_rhs "$val")"
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sed -ri \
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"s/^[[:space:]]*(${sedKey}[[:space:]]*=[[:space:]]*)\S.*\$/\1${sedVal}/" \
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"$newConfigFile"
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if ! grep -qE "^${sedKey}[[:space:]]*=" "$newConfigFile"; then
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echo "$key = $val" >> "$newConfigFile"
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fi
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}
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rabbit_comment_config() {
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local key="$1"; shift
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[ -e "$newConfigFile" ] || touch "$newConfigFile"
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local sedKey="$(sed_escape_lhs "$key")"
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sed -ri \
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"s/^[[:space:]]*#?[[:space:]]*(${sedKey}[[:space:]]*=[[:space:]]*\S.*)\$/# \1/" \
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"$newConfigFile"
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}
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rabbit_env_config() {
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local prefix="$1"; shift
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local conf
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for conf; do
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local var="rabbitmq${prefix:+_$prefix}_$conf"
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var="${var^^}"
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local key="$conf"
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case "$prefix" in
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ssl) key="ssl_options.$key" ;;
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management_ssl) key="management.ssl.$key" ;;
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esac
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local val="${!var:-}"
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local rawVal="$val"
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case "$conf" in
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fail_if_no_peer_cert)
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case "${val,,}" in
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false|no|0|'') rawVal='false' ;;
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true|yes|1|*) rawVal='true' ;;
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esac
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;;
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vm_memory_high_watermark) continue ;; # handled separately
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esac
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if [ -n "$rawVal" ]; then
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rabbit_set_config "$key" "$rawVal"
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else
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rabbit_comment_config "$key"
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fi
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done
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}
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if [ "$1" = 'rabbitmq-server' ] && [ "$shouldWriteConfig" ]; then
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rabbit_set_config 'loopback_users.guest' 'false'
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# determine whether to set "vm_memory_high_watermark" (based on cgroups)
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memTotalKb=
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if [ -r /proc/meminfo ]; then
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memTotalKb="$(awk -F ':? +' '$1 == "MemTotal" { print $2; exit }' /proc/meminfo)"
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fi
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memLimitB=
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if [ -r /sys/fs/cgroup/memory/memory.limit_in_bytes ]; then
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# "18446744073709551615" is a valid value for "memory.limit_in_bytes", which is too big for Bash math to handle
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# "$(( 18446744073709551615 / 1024 ))" = 0; "$(( 18446744073709551615 * 40 / 100 ))" = 0
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memLimitB="$(awk -v totKb="$memTotalKb" '{
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limB = $0;
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limKb = limB / 1024;
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if (!totKb || limKb < totKb) {
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printf "%.0f\n", limB;
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}
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}' /sys/fs/cgroup/memory/memory.limit_in_bytes)"
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fi
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if [ -n "$memLimitB" ]; then
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# if we have a cgroup memory limit, let's inform RabbitMQ of what it is (so it can calculate vm_memory_high_watermark properly)
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# https://github.com/rabbitmq/rabbitmq-server/pull/1234
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rabbit_set_config 'total_memory_available_override_value' "$memLimitB"
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fi
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# https://www.rabbitmq.com/memory.html#memsup-usage
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if [ "${RABBITMQ_VM_MEMORY_HIGH_WATERMARK:-}" ]; then
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# https://github.com/docker-library/rabbitmq/pull/105#issuecomment-242165822
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vmMemoryHighWatermark="$(
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echo "$RABBITMQ_VM_MEMORY_HIGH_WATERMARK" | awk '
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/^[0-9]*[.][0-9]+$|^[0-9]+([.][0-9]+)?%$/ {
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perc = $0;
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if (perc ~ /%$/) {
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gsub(/%$/, "", perc);
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perc = perc / 100;
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}
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if (perc > 1.0 || perc < 0.0) {
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printf "error: invalid percentage for vm_memory_high_watermark: %s (must be >= 0%%, <= 100%%)\n", $0 > "/dev/stderr";
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exit 1;
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}
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printf "vm_memory_high_watermark.relative %0.03f\n", perc;
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next;
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}
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/^[0-9]+$/ {
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printf "vm_memory_high_watermark.absolute %s\n", $0;
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next;
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}
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/^[0-9]+([.][0-9]+)?[a-zA-Z]+$/ {
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printf "vm_memory_high_watermark.absolute %s\n", $0;
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next;
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}
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{
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printf "error: unexpected input for vm_memory_high_watermark: %s\n", $0;
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exit 1;
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}
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'
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)"
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if [ "$vmMemoryHighWatermark" ]; then
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vmMemoryHighWatermarkKey="${vmMemoryHighWatermark%% *}"
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vmMemoryHighWatermarkVal="${vmMemoryHighWatermark#$vmMemoryHighWatermarkKey }"
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rabbit_set_config "$vmMemoryHighWatermarkKey" "$vmMemoryHighWatermarkVal"
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case "$vmMemoryHighWatermarkKey" in
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# make sure we only set one or the other
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'vm_memory_high_watermark.absolute') rabbit_comment_config 'vm_memory_high_watermark.relative' ;;
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'vm_memory_high_watermark.relative') rabbit_comment_config 'vm_memory_high_watermark.absolute' ;;
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esac
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fi
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fi
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if [ "$haveSslConfig" ]; then
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rabbit_set_config 'listeners.ssl.default' 5671
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rabbit_env_config 'ssl' "${sslConfigKeys[@]}"
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else
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rabbit_set_config 'listeners.tcp.default' 5672
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fi
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rabbit_env_config '' "${rabbitConfigKeys[@]}"
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# if management plugin is installed, generate config for it
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# https://www.rabbitmq.com/management.html#configuration
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if [ "$(rabbitmq-plugins list -q -m -e 'rabbitmq_management$')" ]; then
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if [ "$haveManagementSslConfig" ]; then
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rabbit_set_config 'management.listener.port' 15671
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rabbit_set_config 'management.listener.ssl' 'true'
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rabbit_env_config 'management_ssl' "${sslConfigKeys[@]}"
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else
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rabbit_set_config 'management.listener.port' 15672
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rabbit_set_config 'management.listener.ssl' 'false'
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fi
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# if definitions file exists, then load it
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# https://www.rabbitmq.com/management.html#load-definitions
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managementDefinitionsFile='/etc/rabbitmq/definitions.json'
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if [ -f "$managementDefinitionsFile" ]; then
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# see also https://github.com/docker-library/rabbitmq/pull/112#issuecomment-271485550
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rabbit_set_config 'management.load_definitions' "$managementDefinitionsFile"
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fi
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fi
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fi
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combinedSsl='/tmp/rabbitmq-ssl/combined.pem'
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if [ "$haveSslConfig" ] && [[ "$1" == rabbitmq* ]] && [ ! -f "$combinedSsl" ]; then
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# Create combined cert
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{
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cat "$RABBITMQ_SSL_CERTFILE"
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echo # https://github.com/docker-library/rabbitmq/issues/357#issuecomment-517755647
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cat "$RABBITMQ_SSL_KEYFILE"
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} > "$combinedSsl"
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chmod 0400 "$combinedSsl"
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fi
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if [ "$haveSslConfig" ] && [ -f "$combinedSsl" ]; then
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# More ENV vars for make clustering happiness
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# we don't handle clustering in this script, but these args should ensure
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# clustered SSL-enabled members will talk nicely
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export ERL_SSL_PATH="$(erl -eval 'io:format("~p", [code:lib_dir(ssl, ebin)]),halt().' -noshell)"
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sslErlArgs="-pa $ERL_SSL_PATH -proto_dist inet_tls -ssl_dist_opt server_certfile $combinedSsl -ssl_dist_opt server_secure_renegotiate true client_secure_renegotiate true"
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export RABBITMQ_SERVER_ADDITIONAL_ERL_ARGS="${RABBITMQ_SERVER_ADDITIONAL_ERL_ARGS:-} $sslErlArgs"
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export RABBITMQ_CTL_ERL_ARGS="${RABBITMQ_CTL_ERL_ARGS:-} $sslErlArgs"
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fi
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exec "$@"
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