pat-s
0c86b2692d
## Problem
`tofu plan` after importing the middleware script shows:
```
~ resource "bunnynet_pullzone" "cran_rpkgs_com" {
~ cache_vary_headers = [
- "User-Agent",
]
```
The zone carries `cache_vary_headers = ["User-Agent"]`, set before this configuration existed. `cdn.tf` never declared it, so the first apply of the managed middleware would remove it — as a side effect of an unrelated change, with no decision recorded anywhere.
## What this changes
Declares the attribute with its current value, so the pull zone is a no-op in that plan.
## Why keep it rather than let it go
On paper the router makes it redundant. The only UA-dependent responses it produces are redirects, and those carry `Cache-Control: no-store`; their targets are concrete per-slot, per-minor URLs whose content depends only on the path. Dropping the vary would also be a genuine win, since otherwise every distinct R version string (`R (4.5.3 x86_64-pc-linux-musl …)`) keys its own copy of every tarball.
It stays anyway, for now:
- it is the second line of defence against the one failure mode that would be quiet and confusing — an R 4.6 client served the 4.5 index
- Bunny honouring `no-store` on an edge-script response has been confirmed for today's redirects (`cdn-cache: BYPASS` on `max-age=0`), but not for the new script in production
- keeping it is the status quo, so it cannot regress anything
Removing it is worth doing on its own, once per-minor routing is confirmed live and the redirects can be observed bypassing cache — not as a side effect of enabling that routing.
## Verification
`tofu validate` passes. Re-planning after this merges should leave `bunnynet_pullzone.cran_rpkgs_com` unchanged, reducing the plan to the script `content` update and the new `UNION_SLOTS` variable.
Reviewed-on: #156
156 lines
4.7 KiB
HCL
156 lines
4.7 KiB
HCL
# https://registry.terraform.io/providers/BunnyWay/bunnynet/latest/docs/resources/pullzone
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# terraform import bunnynet_pullzone.devxy-r-binaries cran
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# resource "bunnynet_pullzone" "devxy-r-binaries" {
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# name = "cran"
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# origin {
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# type = "OriginUrl"
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# url = "https://devxy-rpkgs-binaries.s3.eu-central-003.backblazeb2.com"
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# }
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# routing {
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# tier = "Standard"
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# }
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# s3_auth_enabled = true
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# s3_auth_key = var.B2_S3_ACCESS_KEY
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# s3_auth_secret = var.B2_S3_SECRET_KEY
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# s3_auth_region = "eu-central-003"
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# cache_enabled = true
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# cache_errors = true
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# request_coalescing_enabled = true
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# block_post_requests = true
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# limit_requests = 500
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# limit_connections = 50
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# safehop_enabled = true
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# add_canonical_header = true
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# cache_stale = ["offline", "updating"]
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# use_background_update = true
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# block_ips = var.cdn_block_ips
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# # 50 TB
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# limit_bandwidth = 50000000000000
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# permacache_storagezone = bunnynet_storage_zone.devxy-r-binaries.id
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# # rec from docs: https://www.backblaze.com/docs/cloud-storage-integrate-bunnynet-with-backblaze-b2
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# block_root_path = true
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# }
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# resource "bunnynet_pullzone_hostname" "devxy-r-binaries" {
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# pullzone = bunnynet_pullzone.devxy-r-binaries.id
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# name = "cran.devxy.io"
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# force_ssl = true
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# tls_enabled = true
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# }
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### cran.rpkgs.com
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# The edge middleware that resolves the bare cran.rpkgs.com form to an
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# <arch>/<os> slot and routes PACKAGES* to the per-R-minor slot. The source of
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# truth is edge/rpkgs-router.ts; `tofu apply` publishes a new release.
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#
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# The script pre-dates this configuration, so it is adopted rather than created:
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# tofu import bunnynet_compute_script.rpkgs_router 29277
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resource "bunnynet_compute_script" "rpkgs_router" {
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type = "middleware"
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name = "rpkgs-router"
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content = file("${path.module}/edge/rpkgs-router.ts")
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}
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# Slots ("<arch>/<os>", comma separated) whose per-minor index bincraft has
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# already republished as a union of the per-minor and flat slots. Routing to a
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# slot that is not listed here would hide every package the per-minor index does
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# not carry, so this stays empty until a slot has been backfilled.
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resource "bunnynet_compute_script_variable" "rpkgs_router_union_slots" {
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script = bunnynet_compute_script.rpkgs_router.id
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name = "UNION_SLOTS"
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default_value = ""
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required = false
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}
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resource "bunnynet_pullzone" "cran_rpkgs_com" {
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name = "cran-rpkgs"
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cache_errors = false
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cache_expiration_time = 31919000
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websockets_enabled = false
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errorpage_whitelabel = true
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origin {
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type = "OriginUrl"
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url = "https://devxy-rpkgs-binaries.s3.eu-central-003.backblazeb2.com"
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middleware_script = bunnynet_compute_script.rpkgs_router.id
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}
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routing {
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filters = [
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"scripting",
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]
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}
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s3_auth_enabled = true
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s3_auth_key = var.B2_S3_ACCESS_KEY
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s3_auth_secret = var.B2_S3_SECRET_KEY
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s3_auth_region = "eu-central-003"
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cache_enabled = true
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request_coalescing_enabled = true
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block_post_requests = true
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# Set on the zone since before this configuration existed; declared here so
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# `tofu apply` stops silently removing it.
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#
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# The router makes it redundant on paper: the only UA-dependent responses it
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# produces are redirects, and those carry `Cache-Control: no-store`, while
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# their targets are concrete per-slot, per-minor URLs whose content depends
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# only on the path. Dropping it would also be a real win, because otherwise
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# every distinct R version string keys its own copy of every tarball.
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#
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# It stays for now anyway: it is the second line of defence against the one
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# failure that would be quiet and confusing (an R 4.6 client served the 4.5
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# index), and removing it is worth doing on its own once per-minor routing is
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# confirmed live, not as a side effect of enabling that routing.
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cache_vary_headers = ["User-Agent"]
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limit_requests = 5000
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limit_connections = 1000
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safehop_enabled = true
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add_canonical_header = true
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cache_stale = ["offline", "updating"]
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block_ips = var.cdn_block_ips
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# 50 TB
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limit_bandwidth = 50000000000000
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# permacache_storagezone = bunnynet_storage_zone.devxy-r-binaries.id
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# rec from docs: https://www.backblaze.com/docs/cloud-storage-integrate-bunnynet-with-backblaze-b2
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block_root_path = true
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}
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resource "bunnynet_pullzone_hostname" "cran_rpkgs_com" {
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pullzone = bunnynet_pullzone.cran_rpkgs_com.id
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name = "cran.rpkgs.com"
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force_ssl = true
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tls_enabled = true
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}
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# resource "bunnynet_storage_zone" "devxy-r-binaries" {
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# name = "devxy-r-binaries-storage"
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# region = "DE"
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# zone_tier = "Standard"
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# # Los Angeles and Singapore
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# replication_regions = ["LA", "SG"]
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# }
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