1.Elastic Stack分布式数据采集搜索引擎基础入门介绍

# (1) 禁用交换,以提高对性能和节点稳定性
sudo swapoff -a
sysctl -w vm.swappiness=1

tee -a /etc/profile <<'EOF'
swapoff -a
sysctl -w vm.swappiness=1
EOF

tee -a /etc/security/limits.conf <<'EOF'
# 在启动 Elasticsearch 之前将 memlock 设置为无限制
elk soft memlock unlimited
elk hard memlock unlimited
EOF

tee -a /etc/sysctl.conf <<'EOF'
sysctl -w vm.swappiness=1
EOF

curl -X GET "localhost:9200/_nodes?filter_path=**.mlockall&pretty"
# 在 Windows 上，可以通过系统属性 → 高级 → 性能 → 高级 → 虚拟内存完全禁用分页文件来实现。


# (2) 增加文件描述符数量的限制,例如设置elk用户可打开数量为 65,536 或 更高.
# (3) 增加线程数，ES使用多个线程池来进行不同类型的操作,确保 ES 用户可以创建的线程数为 至少 4096 或者更高。 
ulimit -HSn 65535 && ulimit -HSu 65535
tee -a /etc/profile <<'EOF'
ulimit -HSn 65535
ulimit -HSu 65535
EOF

tee -a /etc/security/limits.conf <<'EOF'
elk soft nofile 65535
elk hard nofile 65535
elk soft nproc 65535
elk hard nproc 65535
EOF

curl -X GET "localhost:9200/_nodes/stats/process?filter_path=**.max_file_descriptors&pretty"


# Elasticsearch 默认使用 mmapfs 目录来存储其索引。操作系统对 mmap 计数的默认限制可能太低，这可能会导致内存不足异常,所以确保足够的虚拟内存。 
sysctl -w vm.max_map_count=262144
tee -a /etc/sysctl.conf <<'EOF'
sysctl -w vm.max_map_count=262144
EOF

# JVM DNS 缓存设置
es.networkaddress.cache.ttl=60
es.networkaddress.cache.negative.ttl=10

# ES使用 Java Native Access (JNA) 库来执行一些 平台相关的本机代码,没有挂载的临时目录(tmp) noexec , 防止 JVM 进程能够将此代码映射为可执行文件
# 必须将 JNA 使用的临时目录重新挂载到不安装 noexec. 
dd if=/dev/zero of=/dev/estemp bs=1M count=1000
mke2fs -t ext4 /dev/estemp
tee -a /etc/fstab <<'EOF'
/dev/estemp /usr/local/elasticsearch-7.15.0/temp ext4 rw,noexec,nosuid,nodev  0 0
EOF
mount -a
mount | egrep --color -w '/dev/estemp'
  # /dev/estemp on /usr/local/elasticsearch-7.15.0/temp type ext4 (rw,nosuid,nodev,noexec,relatime)
export ES_TMPDIR = "/usr/local/elasticsearch-7.15.0/temp"
-Djna.tmpdir="/usr/local/elasticsearch-7.15.0/temp"

# TCP重传超时, 大多数 Linux 发行版默认重新传输任何丢失的数据包 15 次，为了高可用集群(每个ES节点通过TCP连接进行通信)必须能够及时发现节点故障，我们将最大 TCP 重传次数减少到 5。
sysctl -w net.ipv4.tcp_retries2=5
tee -a /etc/sysctl.conf <<'EOF'
sysctl -w net.ipv4.tcp_retries2=5
EOF

$ ls /usr/local/elasticsearch-7.15.0/
bin  config  jdk  lib  LICENSE.txt  logs  modules  NOTICE.txt  plugins  README.asciidoc

# Liunx 主机以及发行版
$ cat /etc/issue.net && uname -a
Ubuntu 20.04.2 LTS
Linux elk1 5.4.0-78-generic #87-Ubuntu SMP Fri Jun 18 16:29:09 UTC 2021 x86_64 x86_64 x86_64 GNU/Linux

$ hostname
elk1

# ES 相关套件版本
$ elasticsearch : 7.15.0
$ elasticsearch jdk : openjdk 16
$ Kibana : 7.15.0

# (1) 使用ES前重要系统配置(临时&永久)
sudo swapoff -a
ulimit -HSn 65535
ulimit -HSu 65535
sysctl -w vm.swappiness=1
sysctl -w vm.max_map_count=262144
sysctl -w net.ipv4.tcp_retries2=5

# 系统启动配置
if [[ $(grep -c "ulimit" /etc/profile) -ne 2 ]];then
tee -a /etc/profile <<'EOF'
swapoff -a
ulimit -HSn 65535
#ulimit -HSu 65535
EOF
fi
# 系统资源限制配置
if [[ $(grep -E -c "^elk" /etc/security/limits.conf) -eq 0 ]];then
tee -a /etc/security/limits.conf <<'EOF'
# 在启动 Elasticsearch 之前将 memlock 设置为无限制
elk soft memlock unlimited
elk hard memlock unlimited
# 文件描述符数量与线程数
elk soft nofile 65535
elk hard nofile 65535
elk soft nproc 65535
elk hard nproc 65535
EOF
fi
# 系统内核参数配置&生效设置
tee -a /etc/sysctl.conf <<'EOF'
# 禁用 swap
vm.swappiness=1
# 确保足够的虚拟内存 
vm.max_map_count=262144
# TCP重传超时次数
net.ipv4.tcp_retries2=5
EOF
sysctl -p

# (2) 下载并安装适用于 Linux 的elasticsearch
export ES_VERSION="7.15.0"
wget -L https://artifacts.elastic.co/downloads/elasticsearch/elasticsearch-${ES_VERSION}-linux-x86_64.tar.gz
wget -L https://artifacts.elastic.co/downloads/elasticsearch/elasticsearch-${ES_VERSION}-linux-x86_64.tar.gz.sha512
shasum -a 512 -c elasticsearch-${ES_VERSION}-linux-x86_64.tar.gz.sha512 
if [ $? -eq 0 ];then
  sudo tar -xzf elasticsearch-${ES_VERSION}-linux-x86_64.tar.gz -C /usr/local
  cd /usr/local/elasticsearch-${ES_VERSION}/
else
  echo -e "\e[31m[*] check shasum elasticsearch-${ES_VERSION}-linux-x86_64.tar.gz failed! \e[0m"
  exit 1
fi
# 自定义 JDK 版本使用
# wget -L https://download.java.net/openjdk/jdk11/ri/openjdk-11+28_linux-x64_bin.tar.gz -O openjdk-11.tar.gz
# tar -zxf openjdk-11.tar.gz -C /usr/local/
# cd /usr/local/openjdk


# (3) jdk 与 elasticsearch 环境变量配置
if [[ $(grep -c "ES_HOME" /etc/profile) -eq 0 ]];then
tee -a /etc/profile <<'EOF'
ES_VERSION="7.15.0"
ES_HOME="/usr/local/elasticsearch-${ES_VERSION}"
ES_JAVA_HOME="${ES_HOME}/jdk"
PATH=${ES_JAVA_HOME}/bin:${ES_HOME}/bin:$PATH
export ES_VERSION ES_HOME ES_JAVA_HOME PATH
EOF
else
  echo -e "\e[31[*] melasticsearch environment failed! \e[0m"
  exit 1
fi
source /etc/profile
echo $PATH
  # /usr/local/elasticsearch-7.15.0/jdk/bin:/usr/local/elasticsearch-7.15.0/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games:/snap/bin

# (4) 创建运行 elasticsearch 用户与权限设置
groupadd elk && useradd elk -g elk
chown -R elk:elk /usr/local/elasticsearch-${ES_VERSION}

# (5) 环境验证
java --version
  # openjdk 16.0.2 2021-07-20
  # OpenJDK Runtime Environment Temurin-16.0.2+7 (build 16.0.2+7)
  # OpenJDK 64-Bit Server VM Temurin-16.0.2+7 (build 16.0.2+7, mixed mode, sharing)
setsid sudo -u elk /usr/local/elasticsearch-7.15.0/bin/elasticsearch  -version  # 此处采用elk用户进行执行elasticsearch
  # Version: 7.15.0, Build: default/tar/79d65f6e357953a5b3cbcc5e2c7c21073d89aa29/2021-09-16T03:05:29.143308416Z, JVM: 16.0.2

# (6) 自启动服务创建
sudo tee /usr/lib/systemd/system/elasticsearch.service <<'EOF'
[Unit]
Description=Elasticsearch Server Systemd
Documentation=https://elastic.co
After=network.target
Wants=network.target

[Service]
Type=simple
User=elk
Group=elk
LimitNOFILE=65536
LimitNPROC=65536
LimitMEMLOCK=infinity
WorkingDirectory=/usr/local/elasticsearch-7.15.0
ExecStart=/usr/local/elasticsearch-7.15.0/bin/elasticsearch
ExecReload=/bin/kill -HUP $MAINPID
KillMode=process
Restart=no

[Install]
WantedBy=multi-user.target
EOF

# 以默认得elastic.yml配置文件进行启动ES 
sudo systemctl daemon-reload && systemctl start elasticsearch.service

# (1) 查看以elk启动得elasticsearch进程
$ systemctl status elasticsearch.service
  # ● elasticsearch.service - Elasticsearch Server Systemd
  #      Loaded: loaded (/lib/systemd/system/elasticsearch.service; disabled; vendor preset: enabled)
  #      Active: inactive (dead) since Sun 2021-09-26 20:14:46 CST; 9min ago
  #        Docs: https://elastic.co
  #    Main PID: 5538 (code=exited, status=0/SUCCESS)
  #       Tasks: 62 (limit: 2244)
  #      Memory: 1.3G
  #      CGroup: /system.slice/elasticsearch.service
  #              ├─5724 /usr/local/elasticsearch-7.15.0/jdk/bin/java -Xshare:auto -Des.networkaddress.cache.ttl=60 -Des.networkaddress.cac>
  #              └─5749 /usr/local/elasticsearch-7.15.0/modules/x-pack-ml/platform/linux-x86_64/bin/controller
$ ps uax | grep "elasticsearch"
  # elk         1976  113 60.7 4370648 1218980 ?     Sl   19:51   0:18 /usr/local/elasticsearch-7.15.0/jdk/bin/java -Xshare:auto -Des.networkaddress.cache.ttl=60 -Des.networkaddress.cache.negative.ttl=10 -XX:+AlwaysPreTouch -Xss1m -Djava.awt.headless=true -Dfile.encoding=UTF-8 -Djna.nosys=true -XX:-OmitStackTraceInFastThrow -XX:+ShowCodeDetailsInExceptionMessages -Dio.netty.noUnsafe=true -Dio.netty.noKeySetOptimization=true -Dio.netty.recycler.maxCapacityPerThread=0 -Dio.netty.allocator.numDirectArenas=0 -Dlog4j.shutdownHookEnabled=false -Dlog4j2.disable.jmx=true -Djava.locale.providers=SPI,COMPAT --add-opens=java.base/java.io=ALL-UNNAMED -XX:+UseG1GC -Djava.io.tmpdir=/tmp/elasticsearch-6557889709816638897 -XX:+HeapDumpOnOutOfMemoryError -XX:HeapDumpPath=data -XX:ErrorFile=logs/hs_err_pid%p.log -Xlog:gc*,gc+age=trace,safepoint:file=logs/gc.log:utctime,pid,tags:filecount=32,filesize=64m -Xms979m -Xmx979m -XX:MaxDirectMemorySize=513802240 -XX:G1HeapRegionSize=4m -XX:InitiatingHeapOccupancyPercent=30 -XX:G1ReservePercent=15 -Des.path.home=/usr/local/elasticsearch-7.15.0 -Des.path.conf=/usr/local/elasticsearch-7.15.0/config -Des.distribution.flavor=default -Des.distribution.type=tar -Des.bundled_jdk=true -cp /usr/local/elasticsearch-7.15.0/lib/* org.elasticsearch.bootstrap.Elasticsearch -d
  # elk         2005  0.0  0.3 108404  7532 ?        Sl   19:51   0:00 /usr/local/elasticsearch-7.15.0/modules/x-pack-ml/platform/linux-x86_64/bin/controller

# (2) 默认得elasticsearch.yml,只能本地回环地址访问。
curl http://127.0.0.1:9200/
  # {
  #   "name" : "elk1",
  #   "cluster_name" : "elasticsearch",
  #   "cluster_uuid" : "R8kofupCROGCAt6WrXT8bQ",
  #   "version" : {
  #     "number" : "7.15.0",
  #     "build_flavor" : "default",
  #     "build_type" : "tar",
  #     "build_hash" : "79d65f6e357953a5b3cbcc5e2c7c21073d89aa29",
  #     "build_date" : "2021-09-16T03:05:29.143308416Z",
  #     "build_snapshot" : false,
  #     "lucene_version" : "8.9.0",
  #     "minimum_wire_compatibility_version" : "6.8.0",
  #     "minimum_index_compatibility_version" : "6.0.0-beta1"
  #   },
  #   "tagline" : "You Know, for Search"
  # }
curl http://10.10.107.225:9200/
  # curl: (7) Failed to connect to 10.10.107.225 port 9200: Connection refused

# (3) elasticsearch.yml 单实例配置
tee ${ES_HOME}/config/elasticsearch.yml <<'EOF'
# ======================== Elasticsearch Configuration =========================
# Please consult the documentation for further information on configuration options:
# https://www.elastic.co/guide/en/elasticsearch/reference/index.html
# Use a descriptive name for the node:
node.name: elk
# Add custom attributes to the node:
node.attr.type: single
# Lock the memory on startup:
bootstrap.memory_lock: true

# By default Elasticsearch is only accessible on localhost. Set a different
# address here to expose this node on the network:
network.host: 10.10.107.225

# By default Elasticsearch listens for HTTP traffic on the first free port it
# finds starting at 9200. Set a specific HTTP port here:
http.port: 9200


# Discovery
discovery.type: single-node

# Security configuration
xpack.security.enabled: true
xpack.security.transport.ssl.enabled: true

# Plugins
http.cors.enabled: true 
http.cors.allow-origin: "*"
http.cors.allow-headers: Authorization,X-Requested-With,Content-Type,Content-Length
EOF

# (4) elastic 认证之配置内置用户的密码
elk@elk1:$ ${ES_HOME}/bin/elasticsearch-setup-passwords interactive
  # Initiating the setup of passwords for reserved users elastic,apm_system,kibana,kibana_system,logstash_system,beats_system,remote_monitoring_user.
  # You will be prompted to enter passwords as the process progresses. Please confirm that you would like to continue [y/N]Y

  # Enter password for [elastic]:
  # Reenter password for [elastic]:
 ....
  # Enter password for [remote_monitoring_user]:
  # Reenter password for [remote_monitoring_user]:
  # Changed password for user [apm_system]
  # Changed password for user [kibana_system]
  # Changed password for user [kibana]
  # Changed password for user [logstash_system]
  # Changed password for user [beats_system]
  # Changed password for user [remote_monitoring_user]
  # Changed password for user [elastic]
# 上面过程中我们需要设置多个默认用户的信息，每个内置用户负责不同的内容。

# (5) 外部客户端通过浏览器访问 http://10.10.107.225:9200/ 或者以下方法
curl -I -H "Content-Type:application/json" -X GET -u elastic:weiyigeek -p 'http://10.10.107.225:9200'
  HTTP/1.1 200 OK
  X-elastic-product: Elasticsearch
  content-type: application/json; charset=UTF-8
  content-length: 532

# (6) 修改elastic用户密码为weiyi123456。
curl -H "Content-Type:application/json" -X POST -u elastic 'http://10.10.107.225:9200/_xpack/security/user/elastic/_password' -d '{ "password" : "weiyi123456" }'
  # Enter host password for user 'elastic':
  # {}





# 使用修改后的密码查看ES健康状态
curl -H "Content-Type:application/json" -X GET -u elastic:weiyi123456 'http://10.10.107.225:9200/_cluster/health?pretty'
  # {
  #   "cluster_name" : "elasticsearch",
  #   "status" : "green",
  #   "timed_out" : false,
  #   "number_of_nodes" : 1,
  #   "number_of_data_nodes" : 1,
  #   "active_primary_shards" : 2,
  #   "active_shards" : 2,
  #   "relocating_shards" : 0,
  #   "initializing_shards" : 0,
  #   "unassigned_shards" : 0,
  #   "delayed_unassigned_shards" : 0,
  #   "number_of_pending_tasks" : 0,
  #   "number_of_in_flight_fetch" : 0,
  #   "task_max_waiting_in_queue_millis" : 0,
  #   "active_shards_percent_as_number" : 100.0
  # }

# Use elk To run Elasticsearch as a daemon, specify -d on the command line, and record the process ID in a file using the -p option
setsid sudo -u elk /usr/local/elasticsearch-7.15.0/bin/elasticsearch -d -p /usr/local/elasticsearch-7.15.0/es.pid

# To shut down Elasticsearch, kill the process ID recorded in the pid file:
pkill -F /usr/local/elasticsearch-7.15.0//es.pid

mkdir -vp /app/{elastic,kibana}/data
docker run --rm --name elastic docker.elastic.co/elasticsearch/elasticsearch:7.13.1
docker run --rm --name kibana docker.elastic.co/kibana/kibana:7.13.1
docker cp elastic:/usr/share/elasticsearch/config/elasticsearch.yml /app/elastic/
docker cp kibana:/usr/share/kibana/config/kibana.yml /app/kibana/

tee /app/elastic/elasticsearch.yml <<'EOF'
cluster.name: "docker-cluster"
node.name: "elastic-single"
network.host: 0.0.0.0
xpack.security.enabled: true
xpack.security.transport.ssl.enabled: true
# 插件跨域配置
http.cors.enabled: true 
http.cors.allow-origin: "*"
http.cors.allow-headers: Authorization,X-Requested-With,Content-Type,Content-Length
EOF

tee /app/kibana/kibana.yml <<'EOF'
# Default Kibana configuration for docker target
server.name: "kibana"
server.host: "0.0.0.0"
server.publicBaseUrl: http://log.weiyigeek.top
elasticsearch.hosts: [ "http://elastic:9200" ]
elasticsearch.username: "kibana_system"
elasticsearch.password: "weiyigeek"
monitoring.ui.container.elasticsearch.enabled: true
# change locale zh-CN
i18n.locale: zh-CN
EOF

docker network create elastic
docker run -d --name elastic \
  --network elastic \
  -p 9200:9200 -p 9300:9300 \
  -e "node.name=elastic-node-1" \
  -e "discovery.type=single-node" \
  -v /app/elastic/data:/usr/share/elasticsearch/data \
  -v /app/elastic/elasticsearch.yml:/usr/share/elasticsearch/config/elasticsearch.yml \
  --privileged=true \
  docker.elastic.co/elasticsearch/elasticsearch:7.14.1

docker run -d --name kibana \
  --network elastic \
  -p 5601:5601 \
  -e "ELASTICSEARCH_HOSTS=http://elastic:9200" \
  -v /app/kibana/kibana.yml:/usr/share/kibana/config/kibana.yml \
  -v /app/kibana/data:/usr/share/elasticsearch/data \
  --privileged=true \
  docker.elastic.co/kibana/kibana:7.14.1

# -e "ES_JAVA_OPTS=-Xms1024m -Xmx1024m" \
# 容器启动状态查看
$ docker stats kibana elastic
CONTAINER ID        NAME                CPU %               MEM USAGE / LIMIT     MEM %               NET I/O             BLOCK I/O           PIDS
e01fa7403823        kibana              0.14%               263.8MiB / 15.64GiB   1.65%               232kB / 3.43MB      0B / 0B             19
9f90fe28213c        elastic             0.00%               1.427GiB / 15.64GiB   9.13%               3.18MB / 219kB      0B / 12MB           90

$ docker exec -it elastic bash
[root@9f90fe28213c elasticsearch]# bin/elasticsearch-setup-passwords interactive
Initiating the setup of passwords for reserved users elastic,apm_system,kibana,kibana_system,logstash_system,beats_system,remote_monitoring_user.
You will be prompted to enter passwords as the process progresses.
Please confirm that you would like to continue [y/N]y
Enter password for [elastic]: # weiyigeek 此处测试我们全部设置为相同的
Reenter password for [elastic]:
.....
Enter password for [remote_monitoring_user]:
Reenter password for [remote_monitoring_user]:
Changed password for user [apm_system]
.....
Changed password for user [elastic]

curl -O https://artifacts.elastic.co/downloads/kibana/kibana-7.15.0-linux-x86_64.tar.gz
curl https://artifacts.elastic.co/downloads/kibana/kibana-7.15.0-linux-x86_64.tar.gz.sha512 | shasum -a 512 -c - 
sudo tar -xzf kibana-7.15.0-linux-x86_64.tar.gz -C /usr/local
mv /usr/local/kibana-7.15.0-linux-x86_64 /usr/local/kibana-7.15.0
sudo chown -R elk:elk /usr/local/kibana-7.15.0
cd /usr/local/kibana-7.15.0
/usr/local/kibana-7.15.0$ ls
  # bin  config  data  LICENSE.txt  node  node_modules  NOTICE.txt  package.json  plugins  README.txt  src  x-pack

elk@elk1:/usr/local/kibana-7.15.0/config$ grep -E -v "^#|^$" kibana.yml
server.port: 5601
server.host: "0.0.0.0"
server.name: "ES-kibana"
elasticsearch.hosts: ["http://10.10.107.225:9200"]
kibana.index: ".kibana"
elasticsearch.username: "kibana_system"
elasticsearch.password: "weiyigeek"
elasticsearch.pingTimeout: 1500
i18n.locale: "zh-CN"

elk@elk1:/usr/local/kibana-7.15.0/bin$ ./kibana
  # log   [21:24:15.074] [info][plugins-service] Plugin "metricsEntities" is disabled.
  # log   [21:24:15.142] [info][server][Preboot][http] http server running at http://0.0.0.0:5601
  # log   [21:24:15.328] [warning][config][deprecation] plugins.scanDirs is deprecated and is no longer used
elk@elk1:/usr/local/kibana-7.15.0/bin$ ps aux | grep "kibana"
  # elk        12505  4.3 10.0 1247832 402708 pts/0  Sl+  21:23   0:30 /usr/local/kibana-7.15.0/node/bin/node --preserve-symlinks-main --preserve-symlinks /usr/local/kibana-7.15.0/src/cli/dist

elasticsearch-head : https://github.com/mobz/elasticsearch-head/archive/master.zip
Node.js : https://npmmirror.com/mirrors/node/latest-v16.x/node-v16.10.0-linux-x64.tar.gz

# 下载解压
wget -L https://npmmirror.com/mirrors/node/latest-v16.x/node-v16.10.0-linux-x64.tar.gz
wget -L https://github.com/mobz/elasticsearch-head/archive/master.zip
sudo tar -zxf node-v16.10.0-linux-x64.tar.gz -C /usr/local/
sudo mv /usr/local/node-v16.10.0-linux-x64 /usr/local/node-v16.10.0
sudo unzip master.zip -d /usr/local/elasticsearch-7.15.0/
sudo ls -alh /usr/local/

# 配置环境变量
vim /etc/profile
NODE_HOME=/usr/local/node-v16.10.0
NODE_PATH=${NODE_HOME}/lib/node_modules
PATH=$PATH:$NODE_HOME/bin
export NODE_HOME NODE_PATH PATH

# 配置生效
source /etc/profile

# 权限设置
sudo chown -R elk:elk /usr/local/elasticsearch-7.15.0
sudo chown -R elk:elk /usr/local/node-v16.10.0

# 验证Node.js
node --version
v16.10.0
npm --version
7.24.0

# 切换到elk用户
su - elk
cd /usr/local/elasticsearch-7.15.0/elasticsearch-head-master/

# 在head 插件目录中执行npm进行安装。
elk@elk1:/usr/local/elasticsearch-7.15.0/elasticsearch-head-master/$ npm install -g grunt --registry=https://registry.npmmirror.com
elk@elk1:/usr/local/elasticsearch-7.15.0/elasticsearch-head-master/$ npm install -g grunt-contrib-clean --registry=https://registry.npmmirror.com

# 检测是否安装成功，如果执行命令后出现版本号就表明成功
grunt -version
  # grunt-cli v1.4.3
  # grunt v1.4.1

vi /usr/local/elasticsearch-7.15.0/elasticsearch-head-master/Gruntfile.js
# 在 97 行中添加一个HOSTNAME。
options: {
  hostname: '10.10.107.225',
  port: 9100,
  base: '.',
  keepalive: true
}

$ grunt server
Running "connect:server" (connect) task
Waiting forever...
Started connect web server on http://10.10.107.225:9100

$ ps aux | grep "grunt"
elk        11938  0.2  1.6 668504 65376 pts/0    Sl   21:04   0:00 grunt

# 如需要后台执行可以执行如下命令 nohup grunt server &

grunt server
>> Local Npm module "grunt-contrib-clean" not found. Is it installed?
>> Local Npm module "grunt-contrib-concat" not found. Is it installed?
>> Local Npm module "grunt-contrib-watch" not found. Is it installed?
>> Local Npm module "grunt-contrib-connect" not found. Is it installed?
>> Local Npm module "grunt-contrib-copy" not found. Is it installed?
>> Local Npm module "grunt-contrib-jasmine" not found. Is it installed?
Warning: Task "connect:server" not found. Use --force to continue.