Build React Native App (4) - Redux, Jest, and NativeBase

Image
From this blog, typescript feature will be added. There are couple of ways to implement static type checking like; flow from facebook, PropTypes and Typescript. Typescript is well integrated with Visual Studio Code and supports better linter, error messages, and intellisense. Reference site Github Sample Ex4 Currnet version D:\GitRepo\reactnative>npm --version 6.3.0 D:\GitRepo\reactnative>react-native --version react-native-cli: 2.0.1 react-native: n/a - not inside a React Native project directory D:\GitRepo\reactnative>yarn --version 1.9.4 Creating React Native App $ react-native init ex4 If you want to specify the version, add "--version 0.57.3" at the end. Add NativeBase to React Native $ npm install native-base --save ... + native-base@2.8.1 added 71 packages from 42 contributors, removed 50 packages, updated 829 packages and audited 34989 packages in 138.542s found 0 vulnerabilities $ $ yarn yarn install v1.9.4 warning package-lock.json found. You...
1 comment

Automation with Ansible (5) - Change/Manage IP from cloned VM

Change and Manage IP from cloned VM

There is a challenge to manage hosts of cloned copies because template can't assign or change any information.

For this, we are going to do this

  1. Running DHCP from ansible host
  2. Add ssh key to CentOS template to change configuration
  3. Preparing YAML
    • Clone from template
    • Read cloned mac address
    • Add mac address to ansible dhcpconfig and assign ip address with static lease
    • Start cloned copy
    • Update hostname on the cloned copy

1) setup DHCP on ansible host

  • Installing DHCP, sudo yum install dhcp
[ansible@ansible01 test]$ sudo yum install dhcp
Loaded plugins: fastestmirror, langpacks
base                                                                | 3.6 kB  00:00:00     
code                                                                | 2.9 kB  00:00:00     
epel/x86_64/metalink                                                |  12 kB  00:00:00     
epel                                                                | 4.7 kB  00:00:00     
extras                                                              | 3.4 kB  00:00:00     
updates                                                             | 3.4 kB  00:00:00     
(1/3): epel/x86_64/updateinfo                                       | 881 kB  00:00:00     
(2/3): code/primary_db                                              |  44 kB  00:00:00     
(3/3): epel/x86_64/primary_db                                       | 6.2 MB  00:00:02     
Loading mirror speeds from cached hostfile
 * base: centos.les.net
 * epel: muug.ca
 * extras: centos.les.net
 * updates: mirror.esecuredata.com
Resolving Dependencies
--> Running transaction check
---> Package dhcp.x86_64 12:4.2.5-58.el7.centos.1 will be installed
--> Processing Dependency: dhcp-libs(x86-64) = 12:4.2.5-58.el7.centos.1 for package: 12:dhcp-4.2.5-58.el7.centos.1.x86_64
--> Processing Dependency: dhcp-common = 12:4.2.5-58.el7.centos.1 for package: 12:dhcp-4.2.5-58.el7.centos.1.x86_64
--> Running transaction check
---> Package dhcp-common.x86_64 12:4.2.5-58.el7.centos will be updated
--> Processing Dependency: dhcp-common = 12:4.2.5-58.el7.centos for package: 12:dhclient-4.2.5-58.el7.centos.x86_64
---> Package dhcp-common.x86_64 12:4.2.5-58.el7.centos.1 will be an update
---> Package dhcp-libs.x86_64 12:4.2.5-58.el7.centos will be updated
---> Package dhcp-libs.x86_64 12:4.2.5-58.el7.centos.1 will be an update
--> Running transaction check
---> Package dhclient.x86_64 12:4.2.5-58.el7.centos will be updated
---> Package dhclient.x86_64 12:4.2.5-58.el7.centos.1 will be an update
--> Finished Dependency Resolution

Dependencies Resolved

===========================================================================================
 Package             Arch           Version                          Repository       Size
===========================================================================================
Installing:
 dhcp                x86_64         12:4.2.5-58.el7.centos.1         updates         513 k
Updating for dependencies:
 dhclient            x86_64         12:4.2.5-58.el7.centos.1         updates         282 k
 dhcp-common         x86_64         12:4.2.5-58.el7.centos.1         updates         174 k
 dhcp-libs           x86_64         12:4.2.5-58.el7.centos.1         updates         130 k

Transaction Summary
===========================================================================================
Install  1 Package
Upgrade             ( 3 Dependent packages)

Total size: 1.1 M
Total download size: 513 k
Is this ok [y/d/N]: y
Downloading packages:
dhcp-4.2.5-58.el7.centos.1.x86_64.rpm                               | 513 kB  00:00:00     
Running transaction check
Running transaction test
Transaction test succeeded
Running transaction
  Updating   : 12:dhcp-libs-4.2.5-58.el7.centos.1.x86_64                               1/7 
  Updating   : 12:dhcp-common-4.2.5-58.el7.centos.1.x86_64                             2/7 
  Updating   : 12:dhclient-4.2.5-58.el7.centos.1.x86_64                                3/7 
  Installing : 12:dhcp-4.2.5-58.el7.centos.1.x86_64                                    4/7 
  Cleanup    : 12:dhclient-4.2.5-58.el7.centos.x86_64                                  5/7 
  Cleanup    : 12:dhcp-common-4.2.5-58.el7.centos.x86_64                               6/7 
  Cleanup    : 12:dhcp-libs-4.2.5-58.el7.centos.x86_64                                 7/7 
  Verifying  : 12:dhcp-common-4.2.5-58.el7.centos.1.x86_64                             1/7 
  Verifying  : 12:dhcp-libs-4.2.5-58.el7.centos.1.x86_64                               2/7 
  Verifying  : 12:dhclient-4.2.5-58.el7.centos.1.x86_64                                3/7 
  Verifying  : 12:dhcp-4.2.5-58.el7.centos.1.x86_64                                    4/7 
  Verifying  : 12:dhcp-common-4.2.5-58.el7.centos.x86_64                               5/7 
  Verifying  : 12:dhcp-libs-4.2.5-58.el7.centos.x86_64                                 6/7 
  Verifying  : 12:dhclient-4.2.5-58.el7.centos.x86_64                                  7/7 

Installed:
  dhcp.x86_64 12:4.2.5-58.el7.centos.1                                                     

Dependency Updated:
  dhclient.x86_64 12:4.2.5-58.el7.centos.1    dhcp-common.x86_64 12:4.2.5-58.el7.centos.1  
  dhcp-libs.x86_64 12:4.2.5-58.el7.centos.1  

Complete!
  • Check ethernet adaptor name, ifconfig
[ansible@ansible01 test]$ ifconfig
ens160: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet 10.200.0.30  netmask 255.255.255.255  broadcast 10.200.0.30
        inet6 fe80::9079:5fdd:75d8:b9a6  prefixlen 64  scopeid 0x20<link>
        ether 00:50:56:8f:4b:e2  txqueuelen 1000  (Ethernet)
        RX packets 44856  bytes 29756654 (28.3 MiB)
        RX errors 0  dropped 43  overruns 0  frame 0
        TX packets 21088  bytes 3974159 (3.7 MiB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0
  • Add specific interface to /etc/sysconfig/dhcpd
[ansible@ansible01 test]$ cat /etc/sysconfig/dhcpd
# WARNING: This file is NOT used anymore.

# If you are here to restrict what interfaces should dhcpd listen on,
# be aware that dhcpd listens *only* on interfaces for which it finds subnet
# declaration in dhcpd.conf. It means that explicitly enumerating interfaces
# also on command line should not be required in most cases.

# If you still insist on adding some command line options,
# copy dhcpd.service from /lib/systemd/system to /etc/systemd/system and modify
# it there.
# https://fedoraproject.org/wiki/Systemd#How_do_I_customize_a_unit_file.2F_add_a_custom_unit_file.3F

# example:
# $ cp /usr/lib/systemd/system/dhcpd.service /etc/systemd/system/
# $ vi /etc/systemd/system/dhcpd.service
# $ ExecStart=/usr/sbin/dhcpd -f -cf /etc/dhcp/dhcpd.conf -user dhcpd -group dhcpd --no-pid <your_interface_name(s)>
# $ systemctl --system daemon-reload
# $ systemctl restart dhcpd.service
DHCPDARGS=ens160
[ansible@ansible01 test]$
  • configure dhcp on ansible host
[ansible@ansible01 etc]$ sudo cat /etc/dhcp/dhcpd.conf
#
# DHCP Server Configuration file.
#   see /usr/share/doc/dhcp*/dhcpd.conf.example
#   see dhcpd.conf(5) man page
#
option domain-name "test.flair.local";
option domain-name-servers 10.200.0.30, 8.8.8.8;
default-lease-time 3600; 
max-lease-time 7200;
authoritative;

subnet 10.200.0.0 netmask 255.255.255.0 {
option routers                  10.200.0.1;
option subnet-mask              255.255.255.0;
option domain-search            "test.local";
option domain-name-servers      10.200.0.30;
range   10.200.0.100   10.200.0.150;
}
[ansible@ansible01 etc]$

Add ssh key to template

  • Generate and copy key to template. Ansible ip is 10.200.0.30 and template ip is 10.200.0.100 in my case and username is ansible. Before running this script, make sure that .ssh folder is not created under user home directory from the template folder.
[ansible@ansible01 ~]$ ssh-keygen
Generating public/private rsa key pair.
Enter file in which to save the key (/home/ansible/.ssh/id_rsa): 
Created directory '/home/ansible/.ssh'.
Enter passphrase (empty for no passphrase): 
Enter same passphrase again: 
Your identification has been saved in /home/ansible/.ssh/id_rsa.
Your public key has been saved in /home/ansible/.ssh/id_rsa.pub.
The key fingerprint is:
SHA256:tiyy8V8MUu+m9BS8KygKzIt0gceXPyTwAnyBZDacjic ansible@ansible01.flair.local
The key's randomart image is:
+---[RSA 2048]----+
|o=o.             |
|++. .            |
|oo o    .        |
|E.* o .. o       |
| + = =..S +      |
|o . + ++ = o     |
|.+ .o .++ B      |
|o.o .=.oo* .     |
|........o.o      |
+----[SHA256]-----+
[ansible@ansible01 ~]$ ls .ssh/
id_rsa  id_rsa.pub
[ansible@ansible01 ~]$
[ansible@ansible01 ~]$ scp .ssh/id_rsa.pub ansible@10.200.0.100:~/.ssh/authorized_keys
ansible@10.200.0.100's password: 
id_rsa.pub                                               100%  418    75.0KB/s   00:00    
[ansible@ansible01 ~]$ 
[ansible@ansible01 .ssh]$ ssh-copy-id -i ~/.ssh/id_rsa.pub ansible@10.200.0.100
/usr/bin/ssh-copy-id: INFO: Source of key(s) to be installed: "/home/ansible/.ssh/id_rsa.pub"
/usr/bin/ssh-copy-id: INFO: attempting to log in with the new key(s), to filter out any that are already installed
/usr/bin/ssh-copy-id: INFO: 1 key(s) remain to be installed -- if you are prompted now it is to install the new keys
ansible@10.200.0.100's password: 

Number of key(s) added: 1

Now try logging into the machine, with:   "ssh 'ansible@10.200.0.100'"
and check to make sure that only the key(s) you wanted were added.

[ansible@ansible01 .ssh]$ ssh 10.200.0.100
Last login: Wed Feb 14 16:23:31 2018 from 10.200.0.30
[ansible@localhost ~]$

  • Check whether network card is active during boot from /etc/sysconfig/network-scripts/ifcfg-ens160. The valule of ONBOOT should be yes, ONBOOT=yes

  • restart network, systemctl restart network

YAML file

- name: Create VM from Template
  hosts: localhost
  connection: local
  become: yes
  tasks:
  - name: createVM from Template
    vsphere_guest:
      vcenter_hostname: 10.200.0.11
      validate_certs: no
      username: administrator@vsphere.local
      password: vsphere_password
      guest: centostemplate04
      from_template: yes
      template_src: CentOSTemplate
      cluster: FlairCluster
      resource_pool: "/Resources/Docker"
      state: powered_off
      vm_extra_config:
        folder: Docker
  - name: Retrieve Cloned VM
    vsphere_guest:
      vcenter_hostname: 10.200.0.11
      validate_certs: no
      username: administrator@vsphere.local
      password: vsphere_password
      guest: centostemplate04
      vmware_guest_facts: yes
    register: clonedvm
  - name: Update DHCPD Entry
    blockinfile:   
      path: /etc/dhcp/dhcpd.conf
      marker: ""
      state: present
      insertafter: EOF
      block: |
        host centostemplate04 {
            hardware ethernet {{ clonedvm.ansible_facts.hw_eth0.macaddress }};
            fixed-address 10.200.0.151;
        }
  - name: Restart DHCPD from ansible host
    shell: 'sudo systemctl restart dhcpd'
    sudo: yes
    async: 30
    poll: 0
    ignore_errors: true
  # - name: Reboot
  #   shell: ssh {{ clonedvm.ansible_facts.hw_eth0.ipaddresses[0] }} 'sudo reboot'
  #   sudo: yes
  #   async: 30
  #   poll: 0
  #   ignore_errors: true
  - name: Boot Cloned VM
    vsphere_guest:
      vcenter_hostname: 10.200.0.11
      validate_certs: no
      username: administrator@vsphere.local
      password: vsphere_password
      guest: centostemplate04
      state: powered_on
  - debug:
      var: clonedvm

Result

[ansible@ansible01 test]$ ansible-playbook createtemplate.yml --extra-vars "ansible_sudo_pass=rootpassword"
 [WARNING]: Unable to parse /etc/ansible/hosts as an inventory source

 [WARNING]: No inventory was parsed, only implicit localhost is available

 [WARNING]: provided hosts list is empty, only localhost is available. Note that the
implicit localhost does not match 'all'

 [WARNING]: Ignoring invalid attribute: sudo


PLAY [Create VM from Template] ************************************************************

TASK [Gathering Facts] ********************************************************************
ok: [localhost]

TASK [createVM from Template] *************************************************************
changed: [localhost]

TASK [Retrieve Cloned VM] *****************************************************************
ok: [localhost]

TASK [Update DHCPD Entry] *****************************************************************
changed: [localhost]

TASK [Restart DHCPD from ansible host] ****************************************************
changed: [localhost]

TASK [Boot Cloned VM] *********************************************************************
ok: [localhost]

TASK [debug] ******************************************************************************
ok: [localhost] => {
    "clonedvm": {
        "ansible_facts": {
            "hw_eth0": {
                "addresstype": "assigned", 
                "ipaddresses": null, 
                "label": "Network adapter 1", 
                "macaddress": "00:50:56:8f:3e:9a", 
                "macaddress_dash": "00-50-56-8f-3e-9a", 
                "summary": "VM Network"
            }, 
            "hw_guest_full_name": "CentOS 4/5/6/7 (64-bit)", 
            "hw_guest_id": "centos64Guest", 
            "hw_instance_uuid": "500f129e-d580-af9b-0a99-85d794ffe12c", 
            "hw_interfaces": [
                "eth0"
            ], 
            "hw_memtotal_mb": 4096, 
            "hw_name": "centostemplate04", 
            "hw_power_status": "POWERED ON", 
            "hw_processor_count": 1, 
            "hw_product_uuid": "420fcd82-9a66-b389-1029-fab5922d40da", 
            "module_hw": true
        }, 
        "changed": false, 
        "failed": false
    }
}

PLAY RECAP ********************************************************************************
localhost                  : ok=7    changed=3    unreachable=0    failed=0   

[ansible@ansible01 test]$

Summary

From this playbook, we've cloned new VM from template and assigned fixed IP using DHCP function. The tutorial, we will integrate DHCP with DNS and will update hostname.

Comments

Post a Comment

Popular posts from this blog

Build React Native App (4) - Redux, Jest, and NativeBase

Image
From this blog, typescript feature will be added. There are couple of ways to implement static type checking like; flow from facebook, PropTypes and Typescript. Typescript is well integrated with Visual Studio Code and supports better linter, error messages, and intellisense. Reference site Github Sample Ex4 Currnet version D:\GitRepo\reactnative>npm --version 6.3.0 D:\GitRepo\reactnative>react-native --version react-native-cli: 2.0.1 react-native: n/a - not inside a React Native project directory D:\GitRepo\reactnative>yarn --version 1.9.4 Creating React Native App $ react-native init ex4 If you want to specify the version, add "--version 0.57.3" at the end. Add NativeBase to React Native $ npm install native-base --save ... + native-base@2.8.1 added 71 packages from 42 contributors, removed 50 packages, updated 829 packages and audited 34989 packages in 138.542s found 0 vulnerabilities $ $ yarn yarn install v1.9.4 warning package-lock.json found. You...
Read more

Replacing text in PDF file using iTextSharp

ReplacingTextUsingITextSharp title: Replacing text in PDF file using iTextSharp tags: - PDF - Replace Text - iTextSharp date: Nov 11, 2016 Overview I’ve trying to replace text in PDF file and this is most simple way to replace text in PDF files. Before approaching this, I’ve tried to replace text using command toolkit with pdftk, qpdf to decrypt, and sfk181 to replace string with new, but this approach faced couple of issues; 1. font, 2. text area size. After long investigation, this may be easy way to replace text. Put white colored rectangle on top of string and stamp text on the location like erase text using whitner and write on top of it. Tools Visual Studio 2013 C# iTextSharp Code using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Threading.Tasks; using iTextSharp.text.pdf; using iTextSharp.text.pdf.parser; using iTextSharp.text; using System.IO; namespace EMTechnicalDieline { class Program ...
Read more

Using GIT(Bitbucket), Visual Studio Code

Concept of Git Git has two repositories; local and remote. Two different commands type to commit the changes; 1. commit/add: load/save changes to the local repository. 2. push/pull/clone: load/save changes from/to remote repository. How to setup remote git server , bitbucket , with Visual Studio Code To use git, I downloaded it from [git-scm](“ https://git-scm.com/downloads “) and installed with bash mode to keep the comparability for different platform. Set up remote repository * Create project from bitbucket. In this case, I created “blogmarkdown”. Remember the URL for the git repository. To find out the repository, just add “.git” at the end of the URL from bitbucket. For me, it will be “ https://alexjoh@bitbucket.org/alexjoh/blogmarkdown.git ” Link the remote with local folder * Create local folder. In my case, I created d:\gitrepo Initialize git local repo. Change the folder to the gitrepo and run git init If there are existing files from a remote git re...
Read more