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utils/filtron.sh: add script to install filtron middleware
Signed-off-by: Markus Heiser <markus.heiser@darmarit.de>
This commit is contained in:
Markus Heiser
parent
28dacee288
commit
4139c63d23
1
Makefile
1
Makefile
@ -78,6 +78,7 @@ test: test.pep8 test.unit test.sh test.robot
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test.sh:
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shellcheck -x utils/lib.sh
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shellcheck -x utils/filtron.sh
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test.pep8: pyenvinstall
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$(PY_ENV_ACT); ./manage.sh pep8_check
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214
utils/filtron.sh
Executable file
214
utils/filtron.sh
Executable file
@ -0,0 +1,214 @@
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#!/usr/bin/env bash
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# -*- coding: utf-8; mode: sh -*-
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# shellcheck disable=SC2119
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# shellcheck source=utils/lib.sh
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source "$(dirname "${BASH_SOURCE[0]}")/lib.sh"
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# ----------------------------------------------------------------------------
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# config
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# ----------------------------------------------------------------------------
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FILTRON_ETC="/etc/filtron"
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SERVICE_NAME="filtron"
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SERVICE_USER="${SERVICE_NAME}"
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SERVICE_HOME="/home/${SERVICE_USER}"
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SERVICE_SYSTEMD_UNIT="${SYSTEMD_UNITS}/${SERVICE_NAME}.service"
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# shellcheck disable=SC2034
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SERVICE_GROUP="${SERVICE_USER}"
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GO_ENV="${SERVICE_HOME}/.go_env"
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GO_PKG_URL="https://dl.google.com/go/go1.13.5.linux-amd64.tar.gz"
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GO_TAR=$(basename "$GO_PKG_URL")
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# ----------------------------------------------------------------------------
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usage(){
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# ----------------------------------------------------------------------------
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# shellcheck disable=SC1117
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cat <<EOF
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usage:
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$(basename "$0") shell
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$(basename "$0") install [all|user]
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$(basename "$0") remove [all]
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$(basename "$0") activate [server]
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$(basename "$0") deactivate [server]
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shell - start interactive shell with user ${SERVICE_USER}
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install user - add service user '$SERVICE_USER' at $SERVICE_HOME
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EOF
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[ ! -z ${1+x} ] && echo -e "$1"
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}
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main(){
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rst_title "$SERVICE_NAME" part
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local _usage="ERROR: unknown or missing $1 command $2"
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case $1 in
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--source-only) ;;
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-h|--help) usage ;;
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shell)
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sudo_or_exit
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interactive_shell
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;;
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install)
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sudo_or_exit
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case $2 in
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all) install_all ;;
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user) assert_user ;;
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*) usage "$_usage"; exit 42;;
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esac ;;
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remove)
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sudo_or_exit
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case $2 in
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all) remove_all;;
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user) remove_user ;;
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*) usage "$_usage"; exit 42;;
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esac ;;
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activate)
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sudo_or_exit
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case $2 in
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server) activate_server ;;
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*) usage "$_usage"; exit 42;;
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esac ;;
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deactivate)
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sudo_or_exit
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case $2 in
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server) deactivate_server ;;
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*) usage "$_usage"; exit 42;;
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esac ;;
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*) usage "ERROR: unknown or missing command $1"; exit 42;;
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esac
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}
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install_all() {
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rst_title "Install $SERVICE_NAME (service)"
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assert_user
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install_go
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install_filtron
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install_server
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}
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remove_all() {
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rst_title "De-Install $SERVICE_NAME (service)"
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remove_server
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remove_user
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rm -rf "$FILTRON_ETC"
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wait_key
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}
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install_server() {
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rst_title "Install System-D Unit ${SERVICE_NAME}.service ..." section
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install_template ${SERVICE_SYSTEMD_UNIT} root root 644
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wait_key
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activate_server
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}
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remove_server() {
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if ! ask_yn "Do you really want to deinstall $SERVICE_NAME?"; then
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return
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fi
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deactivate_server
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rm "${SERVICE_SYSTEMD_UNIT}"
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}
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activate_server () {
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rst_title "Activate $SERVICE_NAME (service)" section
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tee_stderr <<EOF | bash 2>&1 | prefix_stdout
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systemctl enable $SERVICE_NAME.service
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systemctl restart $SERVICE_NAME.service
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EOF
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tee_stderr <<EOF | bash 2>&1 | prefix_stdout
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systemctl status $SERVICE_NAME.service
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EOF
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wait_key
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}
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deactivate_server () {
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rst_title "De-Activate $SERVICE_NAME (service)" section
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echo
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tee_stderr <<EOF | bash 2>&1 | prefix_stdout
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systemctl stop $SERVICE_NAME.service
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systemctl disable $SERVICE_NAME.service
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EOF
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wait_key
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}
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assert_user() {
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rst_title "user $SERVICE_USER" section
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echo
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tee_stderr 1 <<EOF | bash | prefix_stdout
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sudo -H adduser --shell /bin/bash --system --home $SERVICE_HOME --group --gecos 'Filtron' $SERVICE_USER
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sudo -H usermod -a -G shadow $SERVICE_USER
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groups $SERVICE_USER
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EOF
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SERVICE_HOME="$(sudo -i -u "$SERVICE_USER" echo \$HOME)"
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export SERVICE_HOME
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echo "export SERVICE_HOME=$SERVICE_HOME"
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cat > "$GO_ENV" <<EOF
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export GOPATH=\$HOME/go-apps
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export PATH=\$PATH:\$HOME/local/go/bin:\$GOPATH/bin
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EOF
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echo "Environment $GO_ENV has been setup."
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tee_stderr <<EOF | sudo -i -u $SERVICE_USER
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grep -qFs -- 'source $GO_ENV' ~/.profile || echo 'source $GO_ENV' >> ~/.profile
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EOF
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}
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remove_user() {
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rst_title "Drop $SERVICE_USER HOME" section
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if ask_yn "Do you really want to drop $SERVICE_USER home folder?"; then
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userdel -r -f "$SERVICE_USER"
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else
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rst_para "Leave HOME folder $(du -sh "$SERVICE_HOME") unchanged."
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fi
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}
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interactive_shell(){
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echo "// exit with STRG-D"
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sudo -H -u ${SERVICE_USER} -i
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}
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_service_prefix="$SERVICE_USER@$(hostname) -->| "
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install_go(){
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rst_title "Install Go in user's HOME" section
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rst_para "download and install go binary .."
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cache_download "${GO_PKG_URL}" "${GO_TAR}"
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tee_stderr 0.1 <<EOF | sudo -i -u "$SERVICE_USER" | prefix_stdout "$_service_prefix"
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echo \$PATH
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echo \$GOPATH
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mkdir -p \$HOME/local
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rm -rf \$HOME/local/go
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tar -C \$HOME/local -xzf ${CACHE}/${GO_TAR}
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EOF
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echo
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sudo -i -u "$SERVICE_USER" <<EOF | prefix_stdout
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! which go >/dev/null && echo "Go Installation not found in PATH!?!"
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which go >/dev/null && go version && echo "congratulations -- Go installation OK :)"
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EOF
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wait_key
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}
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install_filtron() {
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tee_stderr <<EOF | sudo -i -u "$SERVICE_USER" | prefix_stdout "$_service_prefix"
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go get -v -u github.com/asciimoo/filtron 2>&1
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EOF
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install_template "$FILTRON_ETC/rules.json" root root 644
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}
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# ----------------------------------------------------------------------------
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main "$@"
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# ----------------------------------------------------------------------------
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12
utils/lib.sh
12
utils/lib.sh
@ -19,7 +19,7 @@ if [[ -z "$CACHE" ]]; then
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fi
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if [[ -z "$SYSTEMD_UNITS" ]]; then
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SYSTEMD_UNITS="/lib/systemd/system/"
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SYSTEMD_UNITS="/lib/systemd/system"
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fi
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sudo_or_exit() {
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@ -253,9 +253,9 @@ install_template() {
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#
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# install_template --no-eval /etc/updatedb.conf root root 644
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local do_eval=0
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local do_eval=1
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if [[ "$1" == "--no-eval" ]]; then
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do_eval=1; shift
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do_eval=0; shift
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fi
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local dst="${1}"
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local owner=${2-$(id -un)}
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@ -286,6 +286,8 @@ install_template() {
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fi
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fi
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mkdir -p "$(dirname "${dst}")"
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if [[ -f "${dst}" ]] ; then
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info_msg "file ${dst} allready exists on this host"
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choose_one _reply "choose next step with file $dst" \
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@ -296,7 +298,7 @@ install_template() {
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"replace file")
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info_msg "install: ${template_file}"
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sudo -H install -v -o "${owner}" -g "${group}" -m "${chmod}" \
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"${template_file}" "${dst}"
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"${template_file}" "${dst}" | prefix_stdout
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;;
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"leave file unchanged")
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;;
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@ -309,7 +311,7 @@ install_template() {
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else
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info_msg "install: ${template_file}"
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sudo -H install -v -o "${owner}" -g "${group}" -m "${chmod}" \
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"${template_file}" "${dst}"
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"${template_file}" "${dst}" | prefix_stdout
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fi
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}
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56
utils/templates/etc/filtron/rules.json
Normal file
56
utils/templates/etc/filtron/rules.json
Normal file
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[
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{
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"name": "api limit",
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"interval": 60,
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"limit": 1000,
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"filters": ["Path=^/api"],
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"aggregations": ["Path"],
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"actions": [
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{"name": "block"}
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],
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"subrules": [
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{
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"name": "drop put",
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"interval": 60,
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"limit": 100,
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"filters": ["Method=PUT"],
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"aggregations": ["Header:X-Forwarded-For"],
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"actions": [
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{"name": "shell",
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"params": {"cmd": "iptables -A INPUT -s %v -j DROP", "args": ["Header:X-Forwarded-For"]}}
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]
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}
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]
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},
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{
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"name": "log'n'block rss",
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"interval": 300,
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"limit": 2500,
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"filters": ["Path=^/$", "GET:format=rss"],
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"actions": [
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{"name": "log"},
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{"name": "block"}
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]
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},
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{
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"name": "log rule",
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"filters": ["Path=/"],
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"actions": [ {"name": "log"} ],
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"subrules": [
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{
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"name": "block missing accept-language",
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"filters": ["!Header:Accept-Language"],
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"actions": [
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{"name": "block"}
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]
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},
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{
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"name": "block curl",
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"filters": ["Header:User-Agent=[Cc]url"],
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"actions": [
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{"name": "block"}
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]
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}
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]
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}
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]
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29
utils/templates/lib/systemd/system/filtron.service
Normal file
29
utils/templates/lib/systemd/system/filtron.service
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@ -0,0 +1,29 @@
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[Unit]
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Description=${SERVICE_NAME}
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After=syslog.target
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After=network.target
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[Service]
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Type=simple
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User=${SERVICE_USER}
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Group=${SERVICE_GROUP}
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WorkingDirectory=${SERVICE_HOME}
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ExecStart=${SERVICE_HOME}/go-apps/bin/filtron -rules ${FILTRON_RULES}
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Restart=always
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Environment=USER=${SERVICE_USER} HOME=${SERVICE_HOME}
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# Some distributions may not support these hardening directives. If you cannot
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# start the service due to an unknown option, comment out the ones not supported
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# by your version of systemd.
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ProtectSystem=full
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PrivateDevices=yes
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PrivateTmp=yes
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NoNewPrivileges=true
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[Install]
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WantedBy=multi-user.target
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