frostfs-contract/docs/globally-unique-domain-zone.md
Alexander Chuprov 07af5459f7
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[#114] nns: Add docs
Signed-off-by: Alexander Chuprov <a.chuprov@yadro.com>
2024-09-23 13:30:30 +03:00

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# Globally unique domain zone
**Make sure you understand the [basic concepts]((../nns/README.md)) of `NNS`.**
`Globally Unique Domains Zone` (`GUDZ`) is an extension of `NNS` that ensures unique names across multiple domain zones. When this option is enabled, all newly created domains will automatically receive a corresponding alias in the designated global zone. Deleting a domain will also remove its alias from the global zone.
It's important to note that this feature is not retroactive: domains created before this option is enabled will not receive a global alias. Likewise, if the option is later disabled, domains that already have a `GUDZ` alias will retain their records. To fully disable `GUDZ`, all domains must be recreated with the option turned off.
To enable `GUDZ`, add a `cnametgt=$(global domain)` `TXT` record that specifies the global zone.
**Example:**
Domains:
- `poland`
- `sweden`
- `animals.org`
![](img/GUDZ-2.png)
It is necessary to associate the domain zones `.poland` and `.sweden` into the global zone `.animals`.
![](img/GUDZ-1.png)
Create domains:
```
frostfs-adm morph nns register --name="poland" --email="email@email.email" --config /home/achuprov/Documents/work/frostfs-dev-env/frostfs-adm.yml
frostfs-adm morph nns register --name="sweden" --email="email@email.email" --config /home/achuprov/Documents/work/frostfs-dev-env/frostfs-adm.yml
frostfs-adm morph nns register --name="org" --email="email@email.email" --config /home/achuprov/Documents/work/frostfs-dev-env/frostfs-adm.yml
frostfs-adm morph nns register --name="animals.org" --email="email@email.email" --config /home/achuprov/Documents/work/frostfs-dev-env/frostfs-adm.yml
```
Add the `cnametgt` records:
```
frostfs-adm morph nns add-record --name="poland" --data="cnametgt=animals.org" --type="txt" --config /home/achuprov/Documents/work/frostfs-dev-env/frostfs-adm.yml
frostfs-adm morph nns add-record --name="sweden" --data="cnametgt=animals.org" --type="txt" --config /home/achuprov/Documents/work/frostfs-dev-env/frostfs-adm.yml
```
Create a domain with mapping to the global zone:
```
frostfs-adm morph nns register --name="bober.poland" --email="email@email.email" --config /home/achuprov/Documents/work/frostfs-dev-env/frostfs-adm.yml
```
Add any `TXT` record
```
frostfs-adm morph nns add-record --name="bober.poland" --data="CID" --type="txt" --config /home/achuprov/Documents/work/frostfs-dev-env/frostfs-adm.yml
```
Verify that the created domain has alias in the global zone
```
frostfs-adm morph nns tokens -v --config /home/achuprov/Documents/work/frostfs-dev-env/frostfs-adm.yml
balance.frostfs
animals.org
group.frostfs
container
org
container.frostfs
proxy.frostfs
policy.frostfs
alphabet0.frostfs
sweden
frostfsid.frostfs
bober.animals.org (CNAME: bober.sweden)
netmap.frostfs
frostfs
poland
bober.poland
```
Create of a conflicting domain
```
frostfs-adm morph nns register --name="bober.sweden" --email="email@email.email" --config /home/achuprov/Documents/work/frostfs-dev-env/frostfs-adm.yml
unable to register domain: script failed (FAULT state) due to an error: at instruction 1263 (THROW): unhandled exception: "global domain is already taken: bober.animals.org. Domain: bober.sweden
```
**Disable GUDZ**
Delete `cnametgt` records
```
frostfs-adm morph nns delete-records --type=txt --name=poland --config /home/achuprov/Documents/work/frostfs-dev-env/frostfs-adm.yml
```
Create `hamster.poland` and `hamster.sweden`
```
frostfs-adm morph nns register --name="hamster.poland" --email="email@email.email" --config /home/achuprov/Documents/work/frostfs-dev-env/frostfs-adm.yml
frostfs-adm morph nns register --name="hamster.sweden" --email="email@email.email" --config /home/achuprov/Documents/work/frostfs-dev-env/frostfs-adm.yml
```
`hamster.poland` and `hamster.sweden` does not have alias
```
frostfs-adm morph nns tokens -v --config /home/achuprov/Documents/work/frostfs-dev-env/frostfs-adm.yml
balance.frostfs
animals.org
group.frostfs
container
org
container.frostfs
proxy.frostfs
policy.frostfs
alphabet0.frostfs
sweden
frostfsid.frostfs
bober.animals.org (CNAME: bober.poland)
netmap.frostfs
frostfs
poland
bober.poland
hamster.poland
```
Delete global alias of `bober.poland`
```
frostfs-adm morph nns delete-records --name="bober.poland" --type="txt" --config /home/achuprov/Documents/work/frostfs-dev-env/frostfs-adm.yml
```
```
frostfs-adm morph nns tokens -v --config /home/achuprov/Documents/work/frostfs-dev-env/frostfs-adm.yml
balance.frostfs
animals.org
group.frostfs
container
org
container.frostfs
proxy.frostfs
policy.frostfs
alphabet0.frostfs
sweden
frostfsid.frostfs
netmap.frostfs
frostfs
poland
bober.poland
hamster.poland
```
Delete `bober.poland`
```
frostfs-adm morph nns delete --name="bober.poland" --config /home/achuprov/Documents/work/frostfs-dev-env/frostfs-adm.yml
```
```
frostfs-adm morph nns tokens -v --config /home/achuprov/Documents/work/frostfs-dev-env/frostfs-adm.yml
balance.frostfs
animals.org
group.frostfs
container
org
container.frostfs
proxy.frostfs
policy.frostfs
alphabet0.frostfs
sweden
frostfsid.frostfs
netmap.frostfs
frostfs
poland
hamster.poland
```