forked from Archives/searxng
Merge pull request #686 from return42/lib_redis
Add redis DB and connectordependabot/pip/master/sphinx-6.1.3
Markus Heiser
2 years ago
committed by
GitHub
commit
977e9a4330
@ -0,0 +1,8 @@
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.. _redis db:
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========
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Redis DB
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========
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.. automodule:: searx.shared.redisdb
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:members:
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@ -0,0 +1,47 @@
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# SPDX-License-Identifier: AGPL-3.0-or-later
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# lint: pylint
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"""Implementation of the redis client (redis-py_).
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.. _redis-py: https://github.com/redis/redis-py
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This implementation uses the :ref:`settings redis` setup from ``settings.yml``.
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A redis DB connect can be tested by::
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>>> from searx.shared import redisdb
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>>> redisdb.init()
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True
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>>> db = redisdb.client()
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>>> db.set("foo", "bar")
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True
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>>> db.get("foo")
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b'bar'
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>>>
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"""
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import logging
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import redis
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from searx import get_setting
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logger = logging.getLogger('searx.shared.redis')
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_client = None
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def client():
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global _client # pylint: disable=global-statement
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if _client is None:
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# not thread safe: in the worst case scenario, two or more clients are
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# initialized only one is kept, the others are garbage collected.
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_client = redis.Redis.from_url(get_setting('redis.url'))
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return _client
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def init():
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try:
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c = client()
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logger.info("connected redis DB --> %s", c.acl_whoami())
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return True
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except redis.exceptions.ConnectionError as exc:
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logger.error("can't connet redis DB ...")
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logger.error(" %s", exc)
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return False
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@ -0,0 +1,348 @@
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#!/usr/bin/env bash
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# -*- coding: utf-8; mode: sh indent-tabs-mode: nil -*-
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# SPDX-License-Identifier: AGPL-3.0-or-later
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#
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# Tools to build and install redis [1] binaries & packages.
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#
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# [1] https://redis.io/download#installation
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#
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# 1. redis.devpkg (sudo)
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# 2. redis.build
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# 3. redis.install (sudo)
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#
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# systemd commands::
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#
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# sudo -H systemctl status searxng-redis
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# sudo -H journalctl -u searxng-redis
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# sudo -H journalctl --vacuum-size=1M
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#
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# Test socket connection from client (local user)::
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#
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# $ sudo -H ./manage redis.addgrp "${USER}"
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# # logout & login to get member of group
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# $ groups
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# ... searxng-redis ...
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# $ source /usr/local/searxng-redis/.redis_env
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# $ which redis-cli
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# /usr/local/searxng-redis/.local/bin/redis-cli
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#
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# $ redis-cli -s /usr/local/searxng-redis/redis.sock
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# redis /usr/local/searxng-redis/redis.sock> set foo bar
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# OK
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# redis /usr/local/searxng-redis/redis.sock> get foo
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# "bar"
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# [CTRL-D]
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# shellcheck disable=SC2091
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# shellcheck source=utils/lib.sh
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. /dev/null
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REDIS_GIT_URL="https://github.com/redis/redis.git"
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REDIS_GIT_TAG="${REDIS_GIT_TAG:-6.2.6}"
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REDIS_USER="searxng-redis"
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REDIS_HOME="/usr/local/${REDIS_USER}"
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REDIS_HOME_BIN="${REDIS_HOME}/.local/bin"
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REDIS_ENV="${REDIS_HOME}/.redis_env"
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REDIS_SERVICE_NAME="searxng-redis"
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REDIS_SYSTEMD_UNIT="${SYSTEMD_UNITS}/${REDIS_SERVICE_NAME}.service"
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# binaries to compile & install
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REDIS_INSTALL_EXE=(redis-server redis-benchmark redis-cli)
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# link names of redis-server binary
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REDIS_LINK_EXE=(redis-sentinel redis-check-rdb redis-check-aof)
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REDIS_CONF="${REDIS_HOME}/redis.conf"
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REDIS_CONF_TEMPLATE=$(cat <<EOF
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# Note that in order to read the configuration file, Redis must be
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# started with the file path as first argument:
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#
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# ./redis-server /path/to/redis.conf
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# bind 127.0.0.1 -::1
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protected-mode yes
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# Accept connections on the specified port, default is 6379 (IANA #815344).
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# If port 0 is specified Redis will not listen on a TCP socket.
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port 0
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# Specify the path for the Unix socket that will be used to listen for
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# incoming connections.
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unixsocket ${REDIS_HOME}/run/redis.sock
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unixsocketperm 770
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# The working directory.
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dir ${REDIS_HOME}/run
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# If you run Redis from upstart or systemd, Redis can interact with your
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# supervision tree.
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supervised auto
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pidfile ${REDIS_HOME}/run/redis.pid
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# log to the system logger
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syslog-enabled yes
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EOF
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)
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redis.help(){
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cat <<EOF
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redis.:
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devpkg : install essential packages to compile redis
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build : build redis binaries at $(redis._get_dist)
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install : create user (${REDIS_USER}) and install systemd service (${REDIS_SERVICE_NAME})
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remove : delete user (${REDIS_USER}) and remove service (${REDIS_SERVICE_NAME})
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shell : start bash interpreter from user ${REDIS_USER}
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src : clone redis source code to <path> and checkput ${REDIS_GIT_TAG}
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useradd : create user (${REDIS_USER}) at ${REDIS_HOME}
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userdel : delete user (${REDIS_USER})
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addgrp : add <user> to group (${REDIS_USER})
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rmgrp : remove <user> from group (${REDIS_USER})
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EOF
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}
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redis.devpkg() {
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# Uses OS package manager to install the essential packages to build and
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# compile sources
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sudo_or_exit
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case ${DIST_ID} in
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ubuntu|debian)
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pkg_install git build-essential
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;;
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arch)
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pkg_install git base-devel
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;;
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fedora)
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pkg_install git @development-tools
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;;
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centos)
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pkg_install git
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yum groupinstall "Development Tools" -y
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;;
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*)
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err_msg "$DIST_ID-$DIST_VERS: No rules to install development tools from OS."
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return 42
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;;
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esac
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}
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redis.build() {
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# usage: redis.build
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rst_title "get redis sources" section
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redis.src "${CACHE}/redis"
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if ! required_commands gcc nm make gawk; then
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sudo -H "$0" redis.devpkg
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fi
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rst_title "compile redis sources" section
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pushd "${CACHE}/redis" &>/dev/null
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if ask_yn "Do you run 'make distclean' first'?" Ny; then
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$(bash.cmd) -c "make distclean" 2>&1 | prefix_stdout
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fi
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$(bash.cmd) -c "make" 2>&1 | prefix_stdout
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if ask_yn "Do you run 'make test'?" Ny; then
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$(bash.cmd) -c "make test" | prefix_stdout
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fi
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popd &>/dev/null
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tee_stderr 0.1 <<EOF | $(bash.cmd) 2>&1 | prefix_stdout
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mkdir -p "$(redis._get_dist)"
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cd "${CACHE}/redis/src"
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cp ${REDIS_INSTALL_EXE[@]} "$(redis._get_dist)"
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EOF
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info_msg "redis binaries available at $(redis._get_dist)"
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}
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redis.install() {
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sudo_or_exit
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(
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set -e
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redis.useradd
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redis._install_bin
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redis._install_conf
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redis._install_service
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)
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dump_return $?
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}
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redis.remove() {
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sudo_or_exit
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(
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set -e
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redis._remove_service
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redis.userdel
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)
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dump_return $?
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}
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redis.shell() {
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interactive_shell "${REDIS_USER}"
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}
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redis.src() {
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# usage: redis.src "${CACHE}/redis"
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local dest="${1:-${CACHE}/redis}"
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if [ -d "${dest}" ] ; then
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info_msg "already cloned: $dest"
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tee_stderr 0.1 <<EOF | $(bash.cmd) 2>&1 | prefix_stdout
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cd "${dest}"
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git fetch --all
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git reset --hard tags/${REDIS_GIT_TAG}
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EOF
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else
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tee_stderr 0.1 <<EOF | $(bash.cmd) 2>&1 | prefix_stdout
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mkdir -p "$(dirname "$dest")"
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cd "$(dirname "$dest")"
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git clone "${REDIS_GIT_URL}" "${dest}"
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EOF
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tee_stderr 0.1 <<EOF | $(bash.cmd) 2>&1 | prefix_stdout
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cd "${dest}"
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git checkout tags/${REDIS_GIT_TAG} -b "build-branch"
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EOF
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fi
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}
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redis.useradd(){
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# usage: redis.useradd
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rst_title "add user ${REDIS_USER}" section
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echo
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sudo_or_exit
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# create user account
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tee_stderr 0.5 <<EOF | sudo -H bash | prefix_stdout
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useradd --shell /bin/bash --system \
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--home-dir "${REDIS_HOME}" \
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--comment 'user that runs a redis instance' "${REDIS_USER}"
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mkdir -p "${REDIS_HOME}"
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chown -R "${REDIS_USER}:${REDIS_USER}" "${REDIS_HOME}"
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groups "${REDIS_USER}"
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EOF
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# create App-ENV and add source it in the .profile
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tee_stderr 0.5 <<EOF | sudo -H -u "${REDIS_USER}" bash | prefix_stdout
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mkdir -p "${REDIS_HOME_BIN}"
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echo "export PATH=${REDIS_HOME_BIN}:\\\$PATH" > "${REDIS_ENV}"
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grep -qFs -- 'source "${REDIS_ENV}"' ~/.profile || echo 'source "${REDIS_ENV}"' >> ~/.profile
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EOF
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}
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redis.userdel() {
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sudo_or_exit
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drop_service_account "${REDIS_USER}"
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groupdel "${REDIS_USER}" 2>&1 | prefix_stdout || true
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}
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redis.addgrp() {
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# usage: redis.addgrp <user>
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[[ -z $1 ]] && die_caller 42 "missing argument <user>"
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sudo -H gpasswd -a "$1" "${REDIS_USER}"
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}
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redis.rmgrp() {
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# usage: redis.rmgrp <user>
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[[ -z $1 ]] && die_caller 42 "missing argument <user>"
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sudo -H gpasswd -d "$1" "${REDIS_USER}"
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}
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# private redis. functions
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# ------------------------
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redis._install_bin() {
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local src
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src="$(redis._get_dist)"
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(
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set -e
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for redis_exe in "${REDIS_INSTALL_EXE[@]}"; do
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install -v -o "${REDIS_USER}" -g "${REDIS_USER}" \
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"${src}/${redis_exe}" "${REDIS_HOME_BIN}"
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done
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pushd "${REDIS_HOME_BIN}" &> /dev/null
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for redis_exe in "${REDIS_LINK_EXE[@]}"; do
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info_msg "link redis-server --> ${redis_exe}"
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sudo -H -u "${REDIS_USER}" ln -sf redis-server "${redis_exe}"
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done
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popd &> /dev/null
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)
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}
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redis._install_conf() {
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sudo -H -u "${REDIS_USER}" bash <<EOF
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mkdir -p "${REDIS_HOME}/run"
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echo '${REDIS_CONF_TEMPLATE}' > "${REDIS_CONF}"
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EOF
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}
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redis._install_service() {
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systemd_install_service "${REDIS_SERVICE_NAME}" "${REDIS_SYSTEMD_UNIT}"
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}
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redis._remove_service() {
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systemd_remove_service "${REDIS_SERVICE_NAME}" "${REDIS_SYSTEMD_UNIT}"
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}
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redis._get_dist() {
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if [ -z "${REDIS_DIST}" ]; then
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echo "${REPO_ROOT}/dist/redis/${REDIS_GIT_TAG}/$(redis._arch)"
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else
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echo "${REDIS_DIST}"
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fi
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}
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redis._arch() {
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local ARCH
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case "$(command uname -m)" in
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"x86_64") ARCH=amd64 ;;
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"aarch64") ARCH=arm64 ;;
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"armv6" | "armv7l") ARCH=armv6l ;;
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"armv8") ARCH=arm64 ;;
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.*386.*) ARCH=386 ;;
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ppc64*) ARCH=ppc64le ;;
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*) die 42 "ARCH is unknown: $(command uname -m)" ;;
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esac
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echo "${ARCH}"
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}
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# TODO: move this to the right place ..
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bash.cmd(){
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# print cmd to get a bash in a non-root mode, even if we are in a sudo
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# context.
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local user="${USER}"
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local bash_cmd="bash"
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if [ -n "${SUDO_USER}" ] && [ "root" != "${SUDO_USER}" ] ; then
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user="${SUDO_USER}"
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bash_cmd="sudo -H -u ${SUDO_USER} bash"
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fi
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printf "%s" "${bash_cmd}"
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}
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@ -0,0 +1,42 @@
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[Unit]
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Description=SearXNG redis service
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After=syslog.target
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After=network.target
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Documentation=https://redis.io/documentation
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[Service]
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Type=simple
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User=${REDIS_USER}
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Group=${REDIS_USER}
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WorkingDirectory=${REDIS_HOME}
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Restart=always
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TimeoutStopSec=0
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Environment=USER=${REDIS_USER} HOME=${REDIS_HOME}
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ExecStart=${REDIS_HOME_BIN}/redis-server ${REDIS_CONF}
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ExecPaths=${REDIS_HOME_BIN}
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LimitNOFILE=65535
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NoNewPrivileges=true
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PrivateDevices=yes
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# ProtectSystem=full
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ProtectHome=yes
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ReadOnlyDirectories=/
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ReadWritePaths=-${REDIS_HOME}/run
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UMask=007
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PrivateTmp=yes
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MemoryDenyWriteExecute=true
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ProtectKernelModules=true
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ProtectKernelTunables=true
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ProtectControlGroups=true
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RestrictRealtime=true
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RestrictNamespaces=true
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[Install]
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WantedBy=multi-user.target
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