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Brza implementacija vm ESXi sa Terraformom

Pozdrav svima, moje ime je Ivan i ja sam alkoholičar sistem administrator (OPS).

Želeo bih da vam kažem kako postavljam virtuelne mašine na ESXi bez vCenter koristeći Terraform.

Često morate implementirati/rekreirati virtuelne mašine kako biste testirali ovu ili onu aplikaciju. Zbog lijenosti sam razmišljao o automatizaciji procesa. Moja potraga dovela me je do predivnog proizvoda kompanije hashicorp, teraform.

Mislim da mnogi ljudi znaju šta je Terraform, a ko ne zna, ovo je aplikacija za upravljanje bilo kojim oblakom, infrastrukturom ili uslugom koristeći IasC koncept (Infrastruktura kao kod).

Koristim ESXi kao okruženje za virtuelizaciju. Prilično jednostavno, praktično i pouzdano.
Predviđam pitanje.

Zašto terraform kada možete koristiti vCenter Server?

Možete naravno, ali. Prvo, ovo je dodatna licenca, drugo, ovaj proizvod je jako intenzivan i jednostavno ne stane na moj kućni server, i treće, mogućnost nadogradnje vještina.

Intel NUC platforma djeluje kao server:

CPU: 2 CPUs x Intel(R) Core(TM) i3-4010U CPU @ 1.70GHz
RAM: 8Gb
HDD: 500Gb
ESXi version: ESXi-6.5.0-4564106-standard (VMware, Inc.)

I tako, prvo prvo.

Za sada, podesimo esxi, odnosno otvorimo VNC port u postavkama zaštitnog zida.

Podrazumevano, datoteka je zaštićena od pisanja. Vršimo sljedeće manipulacije:

chmod 644 /etc/vmware/firewall/service.xml
chmod +t /etc/vmware/firewall/service.xml
vi /etc/vmware/firewall/service.xml

dodajte sljedeći blok na kraj datoteke:

<service id="1000">
  <id>packer-vnc</id>
  <rule id="0000">
    <direction>inbound</direction>
    <protocol>tcp</protocol>
    <porttype>dst</porttype>
    <port>
      <begin>5900</begin>
      <end>6000</end>
    </port>
  </rule>
  <enabled>true</enabled>
  <required>true</required>
</service>

Izađi, sačuvaj. Vratite prava i ponovo pokrenite uslugu:

chmod 444 /etc/vmware/firewall/service.xml
esxcli network firewall refresh

Stvarno dok se host ne pokrene ponovo. Nakon toga, ova manipulacija će se morati ponoviti.

Dalje, sav posao ću obavljati u virtuelnoj mašini na istom serveru.

Specifikacije proizvoda:

OS: Centos 7 x86_64 minimal
RAM: 1GB
HDD: 20GB
Selinux: disable
firewalld: disable

Sledeće, trebamo paker, takođe proizvod HashiCorp-a.

Potrebno je za automatsko sklapanje "zlatne" slike. koje ćemo koristiti u budućnosti.

yum install unzip git -y
curl -O https://releases.hashicorp.com/packer/1.5.5/packer_1.5.5_linux_amd64.zip
unzip packer_1.5.5_linux_amd64.zip -d /usr/bin && rm -rf packer_1.5.5_linux_amd64.zip
packer version
Packer v1.5.5

U pokretu packer verzija može doći do greške, jer RedHat baziran može sadržavati paket sa istim imenom.

which -a packer
/usr/sbin/packer

Za rješenje možete kreirati simboličku vezu ili koristiti apsolutnu putanju /usr/bin/packer.

Sada nam treba ovftool download link. Preuzmite, stavite na server i instalirajte:

chmod +x VMware-ovftool-4.4.0-15722219-lin.x86_64.bundle
./VMware-ovftool-4.4.0-15722219-lin.x86_64.bundle
Extracting VMware Installer...done.
You must accept the VMware OVF Tool component for Linux End User
License Agreement to continue.  Press Enter to proceed.
VMWARE END USER LICENSE AGREEMENT
Do you agree? [yes/no]:yes
The product is ready to be installed.  Press Enter to begin
installation or Ctrl-C to cancel. 
Installing VMware OVF Tool component for Linux 4.4.0
    Configuring...
[######################################################################] 100%
Installation was successful.

Idemo dalje.

Na githu sam pripremio sve što vam treba. 

git clone https://github.com/letnab/create-and-deploy-esxi.git && cd create-and-deploy-esxi

U folder iso morate staviti distributivni komplet operativnog sistema. U mom slučaju, ovo je centos 7.

Također morate urediti datoteku. centos-7-base.json:

variables: указать свои данные для подключения
iso_urls: указать актуальный
iso_checksum: чексумма вашего образа

Nakon svih izmjena, pokrenite sklop:

/usr/bin/packer build centos-7-base.json

Ako je sve ispravno konfigurirano i navedeno, tada ćete vidjeti sliku automatske instalacije operativnog sistema. Ovaj proces mi traje 7-8 minuta.

Nakon uspješnog završetka u folderu output-packer-centos7-x86_64 ova fajl će biti lociran.

Instalirajte Terraform:

curl -O https://releases.hashicorp.com/terraform/0.12.24/terraform_0.12.24_linux_amd64.zip
unzip terraform_0.12.24_linux_amd64.zip -d /usr/bin/ && rm -rf terraform_0.12.24_linux_amd64.zip
terraform version
Terraform v0.12.24

Pošto Terraform nema provajdera za ESXi, morate ga napraviti.

Stavljamo:

cd /tmp
curl -O https://dl.google.com/go/go1.14.2.linux-amd64.tar.gz
tar -C /usr/local -xzf go1.14.2.linux-amd64.tar.gz && rm -rf go1.14.2.linux-amd64.tar.gz
export PATH=$PATH:/usr/local/go/bin
go version
go version go1.14.2 linux/amd64

Zatim prikupljamo provajdera:

go get -u -v golang.org/x/crypto/ssh
go get -u -v github.com/hashicorp/terraform
go get -u -v github.com/josenk/terraform-provider-esxi
export GOPATH="$HOME/go"
cd $GOPATH/src/github.com/josenk/terraform-provider-esxi
CGO_ENABLED=0 GOOS=linux GOARCH=amd64 go build -a -ldflags '-w -extldflags "-static"' -o terraform-provider-esxi_`cat version`
cp terraform-provider-esxi_`cat version` /usr/bin

Na cilju smo. Hajde da izbacimo našu sliku.

Idemo u folder:

cd /root/create-and-deploy-esxi/centos7

Prije svega, uredite datoteku varijable.tf. Morate navesti vezu sa ESXi serverom.

U fajlu network_config.cfg sadrže mrežne postavke buduće virtuelne mašine. Promijenite prema svojim potrebama i pokrenite jednoliner:

sed -i -e '2d' -e '3i "network": "'$(gzip < network_config.cfg| base64 | tr -d 'n')'",' metadata.json

Pa, u dosijeu main.tf promijenite putanju do ova datoteke u svoju, ako je drugačija.

Trenutak istine.

terraform init
Initializing the backend...

Initializing provider plugins...

The following providers do not have any version constraints in configuration,
so the latest version was installed.

To prevent automatic upgrades to new major versions that may contain breaking
changes, it is recommended to add version = "..." constraints to the
corresponding provider blocks in configuration, with the constraint strings
suggested below.

* provider.esxi: version = "~> 1.6"
* provider.template: version = "~> 2.1"

Terraform has been successfully initialized!

You may now begin working with Terraform. Try running "terraform plan" to see
any changes that are required for your infrastructure. All Terraform commands
should now work.

If you ever set or change modules or backend configuration for Terraform,
rerun this command to reinitialize your working directory. If you forget, other
commands will detect it and remind you to do so if necessary.

terraform plan
Refreshing Terraform state in-memory prior to plan...
The refreshed state will be used to calculate this plan, but will not be
persisted to local or remote state storage.

data.template_file.Default: Refreshing state...
data.template_file.network_config: Refreshing state...

------------------------------------------------------------------------

An execution plan has been generated and is shown below.
Resource actions are indicated with the following symbols:
  + create

Terraform will perform the following actions:

  # esxi_guest.Default will be created
  + resource "esxi_guest" "Default" {
      + boot_disk_size         = (known after apply)
      + disk_store             = "datastore1"
      + guest_name             = "centos7-test"
      + guest_shutdown_timeout = (known after apply)
      + guest_startup_timeout  = (known after apply)
      + guestinfo              = {
          + "metadata"          = "base64text"
          + "metadata.encoding" = "gzip+base64"
          + "userdata"          = "base64text"
          + "userdata.encoding" = "gzip+base64"
        }
      + guestos                = (known after apply)
      + id                     = (known after apply)
      + ip_address             = (known after apply)
      + memsize                = "1024"
      + notes                  = (known after apply)
      + numvcpus               = (known after apply)
      + ovf_properties_timer   = (known after apply)
      + ovf_source             = "/root/create-and-deploy-esxi/output-packer-centos7-x86_64/packer-centos7-x86_64.ova"
      + power                  = "on"
      + resource_pool_name     = (known after apply)
      + virthwver              = (known after apply)

      + network_interfaces {
          + mac_address     = (known after apply)
          + nic_type        = (known after apply)
          + virtual_network = "VM Network"
        }
    }

Plan: 1 to add, 0 to change, 0 to destroy.

------------------------------------------------------------------------

Note: You didn't specify an "-out" parameter to save this plan, so Terraform
can't guarantee that exactly these actions will be performed if
"terraform apply" is subsequently run.

završiti:

terraform apply

Ako je sve urađeno kako treba, za 2-3 minute će se postaviti nova virtualna mašina sa prethodno napravljene slike.

Upotreba za sve ovo ograničena je samo vašom maštom.

Samo sam želio podijeliti najbolje prakse i pokazati glavne točke u radu s ovim proizvodima.

Hvala na pažnji!

PS: Bit će mi drago konstruktivnoj kritici.

izvor: www.habr.com

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