correct typo modify comment (#16492)

Signed-off-by: NJohn Luo <jiehua.luo@zilliz.com>

deployments/docker/cluster-distributed-deployment/ansible.cfg

+[defaults]
+host_key_checking = False
+inventory = inventory.ini
+private_key_file=~/.my_ssh_keys/gpc_sshkey

deployments/docker/cluster-distributed-deployment/deploy-docker.yml

+---
+- name: setup pre-requisites #Install prerequisite
+  hosts: all
+  become: yes
+  become_user: root
+  roles:
+    - install-modules
+    - configure-hosts-file
+
+- name: install docker
+  become: yes
+  become_user: root
+  hosts: dockernodes
+  roles:
+    - docker-installation
+    
\ No newline at end of file

deployments/docker/cluster-distributed-deployment/deploy-milvus.yml

+---
+# Milvus dependent, before running this playbook, modify the Inventory to make sure
+# correct IP address and Host name are in place.
+- name: Create milvus-etcd, minio, pulsar 
+  hosts: dependencies
+  become: yes
+  become_user: root
+  tags: docker
+  roles:
+    - deploy-etcd
+    - deploy-minio
+    - deploy-pulsar
+
+# Deploy all 3 nodes on the same host can be benefitial from I/O optimized disk, and it's easier
+# to have additional host running a set of milvus nodes.
+- name: Create milvus nodes 
+  hosts: nodes
+  become: yes
+  become_user: root
+  tags: docker
+  roles:
+    - deploy-datanode
+    - deploy-indexnode
+    - deploy-querynode
+
+#Deploy all Coordinators and Proxy on the same host will reduce time to traffic on network.
+- name: Create milvus coords 
+  hosts: coords
+  become: yes
+  become_user: root
+  tags: docker
+  roles:
+    - deploy-rootcoord
+    - deploy-indexcoord
+    - deploy-datacoord
+    - deploy-querycoord
+    - deploy-proxy

deployments/docker/cluster-distributed-deployment/inventory.ini

+[dockernodes]
+dockernode01
+dockernode02
+dockernode03
+
+[admin]
+ansible-controller
+
+[coords]
+; Take note the IP of this host VM, and replace 10.170.0.17 with it.
+dockernode01
+
+[nodes]
+dockernode02
+
+[dependencies]
+; dependencies node will host etcd, minio, pulsar, these 3 roles are the foundation of Milvus. 
+; Take note the IP of this host VM, and replace 10.170.0.19 with it.
+dockernode03
+
+[docker:children]
+dockernodes
+coords
+nodes
+dependencies
+
+[docker:vars]
+ansible_python_interpreter= /usr/bin/python3
+StrictHostKeyChecking= no
+
+; Setup variables to controll what type of network to use when creating containers.
+dependencies_network= host
+nodes_network= host
+
+; Setup varibale to controll what version of Milvus image to use.
+image= milvusdb/milvus-dev:master-20220412-4781db8a
+
+; Setup static IP addresses of the docker hosts as variable for container environment variable config.
+; Before running the playbook, below 4 IP addresses need to be replaced with the IP of your host VM
+; on which the etcd, minio, pulsar, coordinators will be hosted.
+etcd_ip= 10.170.0.19
+minio_ip= 10.170.0.19
+pulsar_ip= 10.170.0.19
+coords_ip= 10.170.0.17
+
+; Setup container environment which later will be used in container creation.
+ETCD_ENDPOINTS= {{etcd_ip}}:2379 
+MINIO_ADDRESS= {{minio_ip}}:9000
+PULSAR_ADDRESS= pulsar://{{pulsar_ip}}:6650
+QUERY_COORD_ADDRESS= {{coords_ip}}:19531
+DATA_COORD_ADDRESS= {{coords_ip}}:13333
+ROOT_COORD_ADDRESS= {{coords_ip}}:53100
+INDEX_COORD_ADDRESS= {{coords_ip}}:31000

deployments/docker/cluster-distributed-deployment/roles/configure-hosts-file/tasks/main.yml

+---
+- name: Configure Hosts File
+  lineinfile: path=/etc/hosts regexp='.*{{ item }}$' line="{{ hostvars[item].ansible_default_ipv4.address }} {{item}}" state=present
+  when: hostvars[item].ansible_default_ipv4.address is defined
+  with_items: "{{ groups['docker'] }}"

deployments/docker/cluster-distributed-deployment/roles/deploy-datacoord/tasks/main.yml

+- name: datacoord
+  docker_container: 
+    name: datacoord
+    image: "{{image}}"
+    command: ["milvus", "run", "datacoord"]
+    env:
+      ETCD_ENDPOINTS: "{{ETCD_ENDPOINTS}}"
+      MINIO_ADDRESS: "{{MINIO_ADDRESS}}"
+      PULSAR_ADDRESS: "{{PULSAR_ADDRESS}}"
+      DATA_COORD_ADDRESS: "{{DATA_COORD_ADDRESS}}"
+      METRICS_PORT: "9095"
+    network_mode: "{{nodes_network}}" #Use the network which defined as variable in Inventory.
\ No newline at end of file

deployments/docker/cluster-distributed-deployment/roles/deploy-datanode/tasks/main.yml

+- name: datanode
+  docker_container: 
+    name: datanode
+    image: "{{image}}"
+    command: "milvus run datanode"
+    env:
+      ETCD_ENDPOINTS: "{{ETCD_ENDPOINTS}}"
+      MINIO_ADDRESS: "{{MINIO_ADDRESS}}"
+      PULSAR_ADDRESS: "{{PULSAR_ADDRESS}}"
+      METRICS_PORT: "9092"
+    network_mode: "{{nodes_network}}" #Use the network which defined as variable in Inventory.
\ No newline at end of file

deployments/docker/cluster-distributed-deployment/roles/deploy-etcd/tasks/main.yml

+- name: etcd
+  docker_container: 
+    name: etcd
+    image: quay.io/coreos/etcd:v3.5.0
+    command: "etcd -listen-peer-urls=http://{{etcd_ip}}:2380 -advertise-client-urls=http://{{etcd_ip}}:2379 -listen-client-urls http://0.0.0.0:2379,http://0.0.0.0:4001 -initial-advertise-peer-urls=http://{{etcd_ip}}:2380 --listen-metrics-urls=http://{{etcd_ip}}:2381 --initial-cluster default=http://{{etcd_ip}}:2380 --data-dir /etcd"
+    healthcheck:
+      test: ["CMD", "wget", "-q", "--tries=1", "--spider", "http://etcd_ip:/health"]
+      interval: 30s
+      timeout: 20s
+      retries: 3
+    env:
+      ETCD_AUTO_COMPACTION_MODE: revision
+      ETCD_AUTO_COMPACTION_RETENTION: "1000"
+      ETCD_QUOTA_BACKEND_BYTES: "4294967296"
+    # volumes:
+    #   - ${DOCKER_VOLUME_DIRECTORY:-.}/volumes/etcd:/etcd
+    network_mode: "{{dependencies_network}}" #Use the network which defined as variable in Inventory.
\ No newline at end of file

deployments/docker/cluster-distributed-deployment/roles/deploy-indexcoord/tasks/main.yml

+- name: indexcoord
+  docker_container: 
+    name: indexcoord
+    image: "{{image}}"
+    command: ["milvus", "run", "indexcoord"]
+    env:
+      ETCD_ENDPOINTS: "{{ETCD_ENDPOINTS}}"
+      MINIO_ADDRESS: "{{MINIO_ADDRESS}}"
+      PULSAR_ADDRESS: "{{PULSAR_ADDRESS}}"
+      INDEX_COORD_ADDRESS: "{{INDEX_COORD_ADDRESS}}"
+      METRICS_PORT: "9097"
+    network_mode: "{{nodes_network}}" #Use the network which defined as variable in Inventory.
\ No newline at end of file

deployments/docker/cluster-distributed-deployment/roles/deploy-indexnode/tasks/main.yml

+- name: indexnode
+  docker_container: 
+    name: indexnode
+    image: "{{image}}"
+    command: "milvus run indexnode"
+    env:
+      ETCD_ENDPOINTS: "{{ETCD_ENDPOINTS}}"
+      MINIO_ADDRESS: "{{MINIO_ADDRESS}}"
+      PULSAR_ADDRESS: "{{PULSAR_ADDRESS}}"
+      INDEX_COORD_ADDRESS: "{{INDEX_COORD_ADDRESS}}"
+      METRICS_PORT: "9093"
+    network_mode: "{{nodes_network}}" #Use the network which defined as variable in Inventory.
\ No newline at end of file

deployments/docker/cluster-distributed-deployment/roles/deploy-minio/tasks/main.yml

+- name: "minio"
+  docker_container:
+    name: minio
+    image: minio/minio:RELEASE.2022-03-17T06-34-49Z
+    env:
+      MINIO_ACCESS_KEY: minioadmin
+      MINIO_SECRET_KEY: minioadmin
+    command: "minio server /minio_data"
+    # volumes:
+    #   - ${DOCKER_VOLUME_DIRECTORY:-.}/volumes/minio:/minio_data
+    healthcheck:
+      test: ["CMD", "curl", "-f", "http://127.0.0.1:9000/minio/health/live"]
+      interval: 30s
+      timeout: 20s
+      retries: 3
+    network_mode: "{{dependencies_network}}" #Use the network which defined as variable in Inventory.
\ No newline at end of file

deployments/docker/cluster-distributed-deployment/roles/deploy-proxy/tasks/main.yml

+- name: "proxy"
+  docker_container: 
+    name: proxy
+    image: "{{image}}"
+    command: "milvus run proxy"
+    env:
+      ETCD_ENDPOINTS: "{{ETCD_ENDPOINTS}}"
+      MINIO_ADDRESS: "{{MINIO_ADDRESS}}"
+      PULSAR_ADDRESS: "{{PULSAR_ADDRESS}}"
+      METRICS_PORT: "9098"
+    network_mode: "{{nodes_network}}" #Use the network which defined as variable in Inventory.

deployments/docker/cluster-distributed-deployment/roles/deploy-pulsar/tasks/main.yml

+- name: "pulsar"
+  docker_container:
+    name: pulsar
+    image: apachepulsar/pulsar:2.8.2
+    env:
+      # bin/apply-config-from-env.py script will modify the configuration file based on the environment variables
+      # nettyMaxFrameSizeBytes must be calculated from maxMessageSize + 10240 (padding)
+      nettyMaxFrameSizeBytes: "104867840" # this is 104857600 + 10240 (padding)
+      defaultRetentionTimeInMinutes: "10080"
+      defaultRetentionSizeInMB: "8192"
+      # maxMessageSize is missing from standalone.conf, must use PULSAR_PREFIX_ to get it configured
+      PULSAR_PREFIX_maxMessageSize: "104857600"
+      PULSAR_GC: -XX:+UseG1GC
+    command: "bin/pulsar standalone --no-functions-worker --no-stream-storage" #/bin/bash -c bin/apply-config-from-env.py conf/standalone.conf &&
+    network_mode: "{{dependencies_network}}" #Use the network which defined as variable in Inventory.

deployments/docker/cluster-distributed-deployment/roles/deploy-querycoord/tasks/main.yml

+- name: querycoord
+  docker_container:
+    name: querycoord
+    image: "{{image}}"
+    command: "milvus run querycoord"
+    env:
+      ETCD_ENDPOINTS: "{{ETCD_ENDPOINTS}}"
+      MINIO_ADDRESS: "{{MINIO_ADDRESS}}"
+      PULSAR_ADDRESS: "{{PULSAR_ADDRESS}}"
+      QUERY_COORD_ADDRESS: "{{QUERY_COORD_ADDRESS}}"
+      METRICS_PORT: "9096"
+    network_mode: "{{nodes_network}}" #Use the network which defined as variable in Inventory.
\ No newline at end of file

deployments/docker/cluster-distributed-deployment/roles/deploy-querynode/tasks/main.yml

+- name: querynode
+  docker_container:
+    name: querynode
+    image: "{{image}}"
+    command: "milvus run querynode"
+    env:
+      ETCD_ENDPOINTS: "{{ETCD_ENDPOINTS}}"
+      MINIO_ADDRESS: "{{MINIO_ADDRESS}}"
+      PULSAR_ADDRESS: "{{PULSAR_ADDRESS}}"
+      METRICS_PORT: "9091"
+    network_mode: "{{nodes_network}}" #Use the network which defined as variable in Inventory.
\ No newline at end of file

deployments/docker/cluster-distributed-deployment/roles/deploy-rootcoord/tasks/main.yml

+- name: rootcoord
+  docker_container: 
+    name: rootcoord
+    image: "{{image}}"
+    command: ["milvus", "run", "rootcoord"]
+    env:
+      ETCD_ENDPOINTS: "{{ETCD_ENDPOINTS}}"
+      MINIO_ADDRESS: "{{MINIO_ADDRESS}}"
+      PULSAR_ADDRESS: "{{PULSAR_ADDRESS}}"
+      QUERY_COORD_ADDRESS: "{{QUERY_COORD_ADDRESS}}"
+      METRICS_PORT: "9094"
+    network_mode: "{{nodes_network}}" #Use the network which defined as variable in Inventory.

deployments/docker/cluster-distributed-deployment/roles/docker-installation/tasks/main.yml

+---
+- name: Install Docker Dependencies 
+  apt: name={{ item }} state=latest update_cache=yes
+  with_items:
+    - apt-transport-https
+    - ca-certificates
+    - software-properties-common 
+  tags: docker
+
+- name: Get Docker key
+  apt_key:
+    url: https://download.docker.com/linux/ubuntu/gpg
+    state: present
+  tags: docker
+
+- name: Add Docker packages to Repository
+  apt_repository:
+    repo: deb [arch=amd64] https://download.docker.com/linux/ubuntu {{ ansible_lsb.codename|lower }} stable
+  tags: docker
+
+- name: Install Docker-CE
+  apt: name="docker-ce" state=latest update_cache=yes
+  tags: docker
+
+- name: Install python3-docker
+  apt: name="python3-docker" state=latest update_cache=yes
+  tags: docker
+
+- name: Install docker-compose python3 library
+  command: "pip3 install docker-compose"

deployments/docker/cluster-distributed-deployment/roles/install-modules/tasks/main.yml

+---
+- name: Install Packages 
+  apt: name={{ item }} state=latest update_cache=yes
+  with_items:
+    - ntp
+    - python3
+    - tcpdump
+    - wget
+    - openssl
+    - curl
+    - python3-pip
+
+