PMM-7883 Add PMM single line installer. (#732)

* PMM-7883 Add PMM single line installer.

* PMM-7883 Add/fix comments..

* PMM-7883 Fix url.

* PMM-7883 Add more log. Supress some errors.

* PMM-7883 Fix comment and parsing args.

* PMM-7883 Simplify gathering info.

* PMM-7883 Align output suppresing with posix. Use ip for ubuntu.

* PMM-7883 Supress error in if. Fix IP parsing for ubuntu 16.04.

* PMM-7883 Group messages. Fix syntax.

get-pmm.sh

@@ -0,0 +1,257 @@
+#!/usr/bin/env bash
+#
+# ###############################
+# Script to run PMM 2.
+# If docker is not installed, this script will try to install it as root user.
+#
+# Usage example:
+# curl -fsSL https://raw.githubusercontent.com/percona/pmm/PMM-2.0/get-pmm.sh -o get-pmm2.sh; chmod +x get-pmm2.sh; ./get-pmm2.sh
+#
+#################################
+
+set -Eeuo pipefail
+trap cleanup SIGINT SIGTERM ERR EXIT
+
+# Set defaults.
+tag=${PMM_TAG:-"latest"}
+repo=${PMM_REPO:-"percona/pmm-server"}
+port=${PMM_PORT:-443}
+container_name=${CONTAINER_NAME:-"pmm-server"}
+interactive=0
+root_is_needed='no'
+
+#######################################
+# Show script usage info.
+#######################################
+usage() {
+  cat <<EOF
+Usage: $(basename "${BASH_SOURCE[0]}") [-h] [-v] [-i] [-t] [-n] [-p]
+
+Script description here.
+
+Available options:
+
+-h, --help          Print this help and exit
+-v, --verbose       Print script debug info
+-i, --interactive   Run script in inteactive mode
+
+-t, --tag="$tag"
+       PMM server container tag (default: latest - PMM server version)
+
+-r, --repo="$repo"
+       PMM server container repo (default percona/pmm-server)
+
+-p, --port=${port}
+      Port number to start PMM server on (default: 443)
+
+-n, --name=${container_name}
+      PMM server container name (default: pmm-server)
+EOF
+  exit
+}
+
+#######################################
+# Clean up setup if interrupt.
+#######################################
+cleanup() {
+  trap - SIGINT SIGTERM ERR EXIT
+}
+
+#######################################
+# Defines colours for output messages.
+#######################################
+setup_colors() {
+  if [[ -t 2 ]] && [[ -z "${NO_COLOR-}" ]] && [[ "${TERM-}" != "dumb" ]]; then
+    NOFORMAT='\033[0m' RED='\033[0;31m' GREEN='\033[0;32m' ORANGE='\033[0;33m'
+    BLUE='\033[0;34m' PURPLE='\033[0;35m' CYAN='\033[0;36m' YELLOW='\033[1;33m'
+  else
+    NOFORMAT='' RED='' GREEN='' ORANGE='' BLUE='' PURPLE='' CYAN='' YELLOW=''
+  fi
+}
+
+#######################################
+# Prints message to stderr with new line at the end.
+#######################################
+msg() {
+  echo >&2 -e "${1-}"
+}
+
+#######################################
+# Prints message and exit with code.
+# Arguments:
+#   message string;
+#   exit code.
+# Outputs:
+#   writes message to stderr.
+#######################################
+die() {
+  local msg=$1
+  local code=${2-1} # default exit status 1
+  msg "$msg"
+  exit "$code"
+}
+
+#######################################
+# Accept and parse script's params.
+#######################################
+parse_params() {
+  while :; do
+    case "${1-}" in
+    -h | --help) usage ;;
+    -v | --verbose) set -x ;;
+    --no-color) NO_COLOR=1 ;;
+    -i | --interactive) interactive=1 ;;
+    -t | --tag)
+      tag="${2-}"
+      shift
+      ;;
+    -r | --repo)
+      repo="${2-}"
+      shift
+      ;;
+    -p | --port)
+      port="${2-}"
+      shift
+      ;;
+    -?*) die "Unknown option: $1" ;;
+    *) break ;;
+    esac
+    shift
+  done
+
+  args=("$@")
+
+  return 0
+}
+
+#######################################
+# Gathers PMM setup param in interactive mode.
+#######################################
+gather_info() {
+  msg "${GREEN}PMM Server Wizard Install${NOFORMAT}"
+  read -p "  Port Number to start PMM Server on (default: 443): " port
+  read -p "  PMM Server Container Name (default: pmm-server): " container_name
+  read -p "  Override specific version (container tag) (default: latest in 2.x series) format: 2.x.y: " tag
+}
+
+check_command() {
+  command -v "$@" 1>/dev/null
+}
+
+#######################################
+# Runs command as root.
+#######################################
+run_root() {
+  sh='sh -c'
+  if [ "$(id -un)" != 'root' ]; then
+    if check_command sudo; then
+      sh='sudo -E sh -c'
+    elif check_command su; then
+      sh='su -c'
+    else
+      die "${RED}ERROR: root rights needed to run "$*" command${NOFORMAT}"
+    fi
+  fi
+  ${sh} "$@"
+}
+
+#######################################
+# Installs docker if needed.
+#######################################
+install_docker() {
+  printf "Checking docker installation"
+  if ! check_command docker; then
+    printf " - not installed. Installing...\n\n"
+    curl -fsSL get.docker.com -o /tmp/get-docker.sh ||
+      wget -qO /tmp/get-docker.sh get.docker.com
+    sh /tmp/get-docker.sh
+    run_root 'service docker start' || :
+  else 
+    printf " - installed.\n\n"
+  fi
+
+  if ! docker ps 1>/dev/null; then
+    root_is_needed='yes'
+    if ! run_root 'docker ps > /dev/null'; then
+      die "${RED}ERROR: cannot run "docker ps" command${NOFORMAT}"
+    fi
+  fi
+}
+
+#######################################
+# Runs docker command as root if required.
+#######################################
+run_docker() {
+  if [ "${root_is_needed}" = 'yes' ]; then
+    run_root "docker $*"
+  else
+    sh -c "docker $*"
+  fi
+}
+
+#######################################
+# Starts PMM server container with give repo, tag, name and port.
+# If any PMM server instance is run - stop and backup it.
+#######################################
+start_pmm() {
+  msg "Starting PMM server..."
+  run_docker "pull $repo:$tag 1> /dev/null"
+
+  if ! run_docker "inspect pmm-data 1> /dev/null 2> /dev/null"; then
+    run_docker "create -v /srv/ --name pmm-data percona/pmm-server:$tag /bin/true 1> /dev/null"
+    msg "Created PMM Data Volume: pmm-data"
+  fi
+
+  if run_docker "inspect pmm-server 1> /dev/null 2> /dev/null"; then
+    pmm_archive="pmm-server-$(date "+%F-%H%M%S")"
+    msg "\tExisting PMM Server found, renaming to $pmm_archive\n"
+    run_docker 'stop pmm-server' || :
+    run_docker "rename pmm-server $pmm_archive\n"
+  fi
+  run_pmm="run -d -p $port:443 --volumes-from pmm-data --name $container_name --restart always $repo:$tag"
+
+  run_docker "$run_pmm 1> /dev/null"
+  msg "Created PMM Server: $container_name"
+  msg "\tUse the following command if you ever need to update your container by hand:"
+  msg "\tdocker $run_pmm \n"
+}
+
+#######################################
+# Shows final message.
+# Shows a list of addresses on which PMM server available.
+#######################################
+show_message() {
+  msg "PMM Server has been successfully setup on this system!\n"
+
+  if check_command ifconfig; then
+    ips=$(ifconfig | awk  '/inet / {print $2}' | sed 's/addr://')
+  elif check_command ip; then
+    ips=$(ip -f inet a | awk -F"[/ ]+" '/inet / {print $3}')
+  else
+    die "${RED}ERROR: cannot detect PMM server address${NOFORMAT}"
+  fi
+
+  msg "You can access your new server using the one of following web addresses:"
+  for ip in $ips; do
+    msg "\t${BLUE}https://$ip:$port/${NOFORMAT}"
+  done
+  msg "\nThe default username is '${PURPLE}admin${NOFORMAT}' and the password is '${PURPLE}admin${NOFORMAT}' :)"
+  msg "Note: Some browsers may not trust the default SSL certificate when you first open one of the urls above."
+  msg "If this is the case, Chrome users may want to type '${PURPLE}thisisunsafe${NOFORMAT}' to bypass the warning.\n"
+}
+
+main() {
+  setup_colors
+  if [[ $interactive == 1 ]]; then
+    gather_info
+  fi
+  msg "Gathering/downloading required components, this may take a moment\n"
+  install_docker
+  start_pmm
+  show_message
+}
+
+parse_params "$@"
+
+main
+die "Enjoy Percona Monitoring and Management!" 0