add coding sect

README.md

@@ -1,5 +1,5 @@
 # rskio
 
-## brief
+## Brief
 
 a mkdocs site for rskio.com

mkdocs/docs/coding/r53-ddns.md

@@ -0,0 +1,103 @@
+# r53-ddns
+
+[https://github.com/rskntroot/r53-ddns](https://github.com/rskntroot/r53-ddns)
+
+Route53 Dynamic DNS
+
+## Brief
+
+Submits a Route53 `ChangeRequest` for updating `A` or `AAAA` records when PublicIP drift is detected.
+
+Drift detection is determined by comparing http request to `icanhazip.com` and a DNS lookup to `cloudflare`.
+
+This is intended to be installed on a public-facing loadbalancer.
+
+## Assumptions
+
+1. Your ISP randomly changes your PublicIP and that pisses you off.
+1. You just want something that will curl `ipv4.icanhazip.com`, check 3rd-party dns, and update Route53.
+1. Your Name records only contain a single IP. (future update maybe).
+
+If so, this is for you.
+
+## Setup
+
+1. setup `Route53AllowRecordUpdate.policy`
+    ```zsh
+    DNS_ZONE_ID=YOURZONEIDHERE \
+    envsubst < aws.policy > Route53AllowRecordUpdate.policy
+    ```
+1. in aws, create IAM user, attach policy, generate access keys for automated service
+1. log into aws cli with the account you created above
+    ```
+    aws configure
+    ```
+1. setup link in `/usr/bin`
+    ``` zsh
+    ln -sf ~/r53-ddns/target/release/r53-ddns /usr/bin/r53-ddns
+    ```
+1. setup systemd service and then install as normal
+    ```zsh
+    DNS_ZONE_ID=YOURZONEIDHERE \
+    DOMAIN_NAME=your.domain.com. \
+    envsubst < r53-ddns.service | sudo tee -a /etc/systemd/system/r53-ddns.service
+    ```
+
+## CLI Usage
+
+```
+$ r53-ddns -h
+A CLI tool for correcting drift between your PublicIP and Route53 DNS A RECORD
+
+Usage: r53-ddns --dns-zone-id <DNS_ZONE_ID> --domain-name <DOMAIN_NAME>
+
+Options:
+  -z, --dns-zone-id <DNS_ZONE_ID>  DNS ZONE ID  (see AWS Console Route53)
+  -d, --domain-name <DOMAIN_NAME>  DOMAIN NAME  (ex. 'docs.rskio.com.')
+  -h, --help                       Print help
+```
+
+### Service
+
+``` zsh
+export DNS_ZONE_ID=YOUR-DNS-ZONE-ID
+export DOMAIN_NAME=YOUR-DOMAIN-NAME
+export USER=$(whoami)
+```
+
+``` zsh
+envsubst < r53-ddns.service | sudo tee -a /etc/systemd/system/r53-ddns.service
+sudo systemctl daemon-reload
+sudo systemctl start r53-ddns.service
+sudo systemctl status r53-ddns.service
+```
+
+```
+$ systemctl status r53-ddns.service
+● r53-ddns.service - Route53 Dynamic DNS Service
+     Loaded: loaded (/etc/systemd/system/r53-ddns.service; enabled; vendor preset: enabled)
+     Active: active (running) since Mon 2024-07-29 09:03:40 UTC; 7min ago
+   Main PID: 215630 (r53-ddns)
+      Tasks: 6 (limit: 18886)
+     Memory: 3.6M
+        CPU: 389ms
+     CGroup: /system.slice/r53-ddns.service
+             └─215630 /usr/bin/r53-ddns -z [##TRUNCATED##] -d rskio.com.
+
+Jul 29 09:03:40 hostname systemd[1]: Started Route53 Dynamic DNS Service.
+Jul 29 09:03:40 hostname r53-ddns[215630]: [2024-07-29T09:03:40Z INFO  r53_ddns] starting with options: -z [##TRUNCATED##] -d rskio.com.
+Jul 29 09:09:41 hostname r53-ddns[215630]: [2024-07-29T09:09:41Z INFO  r53_ddns::dns] dynamic ip drift detected: 10.0.0.1 -> 71.211.88.219
+Jul 29 09:09:41 hostname r53-ddns[215630]: [2024-07-29T09:09:41Z INFO  r53_ddns::route53] requesting update to route53 record for A rskio.com. -> 71.211.88.219
+Jul 29 09:09:41 hostname r53-ddns[215630]: [2024-07-29T09:09:41Z INFO  r53_ddns::route53] change_id: /change/C02168177BNS6R50C32Q has status: Pending
+Jul 29 09:10:41 hostname r53-ddns[215630]: [2024-07-29T09:09:41Z INFO  r53_ddns::route53] change_id: /change/C02168177BNS6R50C32Q has status: Insync
+```
+
+## Q&A
+
+> Why did you do create this monster in rust?
+
+To be able to handle errors in the future.
+
+> wen IPv6?
+
+It should work with IPv6.

mkdocs/docs/coding/test.md

@@ -1,13 +1,14 @@
 
-# Rust
+# IPADDR
 
-## Env::args()
+## Brief
 
-### Brief
+A naive attempt at optimizing an ipv4 address with only std::env
 
-A naive attempt at optimizing a simple ipv4 address checker using env::args() 
+Note, using `strace` to judge efficacy not a valid approach.
+ I ended up trying a couple different tests, but need to work on better methodology.
 
-#### Assumptions
+## Assumptions
 
 === "Cargo.tml"
 
@@ -21,7 +22,9 @@ A naive attempt at optimizing a simple ipv4 address checker using env::args()
   panic = "abort"
   ```
 
-#### Unoptimized
+## Code
+
+### Unoptimized
 
 - Stores args as an immutable (imut) string vector
 - Stores `ip_addr` as imut string then shadows as imut string slice vector
@@ -87,7 +90,7 @@ A naive attempt at optimizing a simple ipv4 address checker using env::args()
     ```
 
 
-#### Optimized
+### Optimized
 
 - Needs some cleanup
 - Needs break for args after index 1