misc: vpptop makefile target

Type: feature

Added make target to install VPPTop - real-time
viewer of VPP metrics.

New targets in /extras/vpptop/Makefile:
* make start - starts the installed VPPTop binary
* make install - does the installation using the local VPP API
* make cleanup - removes the VPPTop local directory
* make help - prints the VPPTop help info

Signed-off-by: Vladimir Lavor <vlavor@cisco.com>
Change-Id: I1b93eaf67214e1fe0567d43409763882caea6416

3 files changed, 276 insertions, 0 deletions

diff --git a/extras/vpptop/Makefile b/extras/vpptop/Makefile
new file mode 100644
index 00000000000..49e4e0fc056
--- /dev/null
+++ b/extras/vpptop/Makefile
@@ -0,0 +1,18 @@
+# Manage VPPTop
+
+.PHONY: install
+install:
+	@ cd ../../ && $(MAKE) json-api-files
+	@./vpptop.sh install
+
+.PHONY: start
+start:
+	@./vpptop.sh start
+
+.PHONY: cleanup
+cleanup:
+	@./vpptop.sh cleanup
+
+.PHONY: help
+help:
+	@./vpptop.sh help
\ No newline at end of file
diff --git a/extras/vpptop/README.md b/extras/vpptop/README.md
new file mode 100644
index 00000000000..215f7df29b2
--- /dev/null
+++ b/extras/vpptop/README.md
@@ -0,0 +1,27 @@
+## VPPTop installer
+
+[VPPTop]((https://github.com/PANTHEONtech/vpptop)) is a real-time data viewer for VPP interfaces and metrics displayed in dynamic terminal user interface, written in GO.
+
+Following make targets are available:
+
+**install** downloads and installs VPPTop including all external dependencies, binary API generator and latest version of GO. Running `make install-dep` (from the VPP top-level Makefile)
+is recommended.
+
+**cleanup** removes VPPTop repository from the target directory (/build-root/vpptop)
+
+**start** runs the VPPTop if installed
+
+**help** shows information about available commands
+
+The VPPTop is installed to be compatible with the given VPP version and may not work with other versions with different API. In that case, the VPPTop has to be re-installed.
+
+### GO variables management
+
+The installer depends on Golang environment variables GOROOT (for the GO installation) and GOPATH (for other binaries). Those variables are read from the environment and set to following values if not found:
+
+GOROOT=/root/.go/
+GOPATH=/root/go/
+
+If you have the GO already installed and have to run the installer with `sudo`, use the `-E` switch to provide those variables to the installer.
+
+
diff --git a/extras/vpptop/vpptop.sh b/extras/vpptop/vpptop.sh
new file mode 100755
index 00000000000..0d079429749
--- /dev/null
+++ b/extras/vpptop/vpptop.sh
@@ -0,0 +1,231 @@
+#!/bin/bash
+
+# A simple script that installs VPPTop utility including
+# all requirements. The binary API is built from the local
+# vpp data. 'make install-dep' is recommended to call first.
+
+set -eo pipefail
+
+OPT_ARG=${1:-}
+
+SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+cd "${SCRIPT_DIR}"/../../
+VPP_DIR=$(pwd)
+BUILD_DIR=${VPP_DIR}/extras/vpptop/build
+
+GOROOT=${GOROOT:-}
+GOPATH=${GOPATH:-}
+
+[ -z "${GOROOT}" ] && GOROOT="${HOME}/.go"
+[ -z "${GOPATH}" ] && GOPATH="${HOME}/go"
+
+function dep_install() {
+  echo "Installing VPPTop dependencies"
+  apt-get update
+  apt-get install git wget curl -y
+}
+
+# Install latest GO version
+function go_install() {
+  local TMP="/tmp"
+
+  # Search for existing golang installation
+  echo "Looking for pre-installed GO.."
+  local installed_ver installed_ver_fmt
+  if [[ -f "${GOROOT}/bin/go" ]]; then
+    installed_ver=$(cd ${GOROOT}/bin && ./go version)
+    installed_ver_fmt=${installed_ver#"go version go"}
+    export PATH=$GOROOT/bin:$PATH
+    export PATH=$GOPATH/bin:$PATH
+    echo "Found installed version ${installed_ver_fmt}"
+    return
+  fi
+
+  # install golang when missing
+  echo ".. none was found. Installing the latest one"
+  mkdir -p "${GOROOT}"
+  mkdir -p "${GOPATH}/"{src,pkg,bin}
+
+  wget "https://dl.google.com/go/$(curl https://golang.org/VERSION?m=text).linux-amd64.tar.gz" -O "${TMP}/go.tar.gz"
+  tar -C "$GOROOT" --strip-components=1 -xzf "${TMP}/go.tar.gz"
+
+  rm -f "${TMP}/go.tar.gz"
+
+  # export for current session so the VPPTop can be installed
+  export GOROOT=${GOROOT}
+  export GOPATH=$GOPATH
+  export PATH=$GOROOT/bin:$PATH
+  export PATH=$GOPATH/bin:$PATH
+
+  cat << EOF
+Installed $(go version)
+Note: following variables were exported for the current session:
+GOROOT=${GOROOT}
+GOPATH=${GOPATH}
+Both were added to PATH
+EOF
+}
+
+# Install GoVPP binary API generator. GoLang required
+# to be installed in version 1.13 or higher
+function install_binapi_gen() {
+  echo "Installing GoVPP binary API generator"
+
+  export GO111MODULE=on
+  # master required for latest VPPTop
+  if [[ ! -f "${GOROOT}/bin/go" ]]; then
+    echo "GO is not installed"
+    exit 1
+  fi
+  cd ${GOROOT}/bin && ./go get git.fd.io/govpp.git/cmd/binapi-generator@master
+
+  local installed_ver installed_ver_fmt
+  installed_ver=$(cd ${GOPATH}/bin && ./binapi-generator -version)
+  installed_ver_fmt=${installed_ver#"govpp "}
+  echo "Binary API generator ${installed_ver_fmt} installed"
+}
+
+# Generate binary API files in the VPPTop directory using
+# the local VPP sources
+function generate_binary_api() {
+  # note: build-root dir is planned to be removed, update the path by then
+  local api_dir=${VPP_DIR}/build-root/install-vpp-native/vpp/share/vpp/api
+  local out_dir=${BUILD_DIR}/vpptop/stats/local/binapi
+
+  if [[ ! -f "${GOPATH}/bin/binapi-generator" ]]; then
+    install_binapi_gen
+  fi
+  if [ ! -d "${BUILD_DIR}" ]; then
+    echo "VPPTop directory does not exist"
+    exit 1
+  elif [ ! -d "${out_dir}" ]; then
+    mkdir -p "${out_dir}"
+  fi
+  if [ ! -d "${api_dir}" ]; then
+    echo "JSON API files missing, call 'make json-api-files' first"
+    exit 1
+  fi
+
+  echo "Generating API"
+  cd ${GOPATH}/bin && ./binapi-generator --output-dir="${out_dir}" -input-dir="${api_dir}" \
+    "${api_dir}"/plugins/dhcp.api.json \
+    "${api_dir}"/core/interface.api.json \
+    "${api_dir}"/core/ip.api.json \
+    "${api_dir}"/core/vpe.api.json
+}
+
+# Retrieve VPPTop repository
+function get_vpptop() {
+  echo "Fetching VPPTop"
+  if [ ! -d "${BUILD_DIR}/vpptop" ]; then
+    mkdir "${BUILD_DIR}"
+    cd "${BUILD_DIR}" && git clone https://github.com/PANTHEONtech/vpptop.git
+  else
+    echo "VPPTop directory already exists"
+  fi
+}
+
+# Resolve VPPTop dependencies and install the binary
+function vpptop_install() {
+  get_vpptop
+  generate_binary_api
+
+  echo "Installing VPPTop"
+  if [ ! -d "${BUILD_DIR}" ]; then
+    echo "VPPTop directory does not exist"
+    exit 1
+  fi
+
+  gopath=${GOROOT}/bin/go
+
+  cd "${BUILD_DIR}"/vpptop && go mod download
+  cd "${BUILD_DIR}"/vpptop && make install
+
+  if [[ ! -x "$(command -v vpptop)" ]] && [[ ! -f "${GOPATH}/bin/vpptop" ]] ; then
+    echo "VPPTop was not successfully installed"
+    exit 1
+  fi
+  if [[ ! -x "$(command -v vpptop)" ]] ; then
+    echo "VPPTop was installed to ${GOPATH}/bin/vpptop"
+  fi
+
+    cat << EOF
+-----
+$(vpptop --help)
+-----
+
+Following binaries were installed:
+${GOPATH}/bin/binapi-generator
+${GOPATH}/bin/vpptop
+EOF
+}
+
+# Starts the vpptop binary
+function vpptop_start() {
+  if [[ -f "${GOPATH}/bin/vpptop"  ]] ; then
+    cd ${GOPATH}/bin && ./vpptop
+    return
+  fi
+
+  echo "VPPTop is not installed, use 'make vpptop-install' first"
+}
+
+# Remove VPPTop repository from extras
+function cleanup() {
+  echo "Cleaning up VPPTop"
+  rm -rf "${BUILD_DIR}"
+}
+
+# Show available commands
+function help() {
+  cat <<__EOF__
+  VPPTop installer
+
+  Run 'make install-dep' before the installation
+
+  <install>:
+  Installs VPPTop requirements (latest GO, GoVPP binary API generator),
+  retrieves VPPTop repository, generates binary API and installs the
+  VPPTop binary.
+
+  <cleanup>:
+  Removes VPPTop repository
+
+  <start>:
+  Runs vpptop binary
+
+__EOF__
+}
+
+# Resolve chosen option and call appropriate functions
+function resolve_option() {
+  local option=$1
+  case ${option} in
+  "start")
+    vpptop_start
+    ;;
+  "install")
+    dep_install
+    go_install
+    vpptop_install
+    ;;
+  "cleanup")
+    cleanup
+    ;;
+  "help")
+    help
+    ;;
+  *) echo invalid option ;;
+  esac
+}
+
+if [[ -n ${OPT_ARG} ]]; then
+  resolve_option "${OPT_ARG}"
+else
+  PS3="--> "
+  options=("install" "cleanup" "help")
+  select option in "${options[@]}"; do
+    resolve_option "${option}"
+    break
+  done
+fi