feat(bootstrap): FELIS_RELEASE 按指定 release 的附件安装，回滚文档不再把人带回最新版

deploy/bootstrap.sh

@@ -90,6 +90,11 @@
 #   FELIS_GITHUB_TOKEN GitHub token; REQUIRED while the repo is private
 #   FELIS_REF         branch/tag/sha — pins the build, overrides the channel, and forces a
 #                     source build (naming a ref asks for that tree, not a published asset)
+#   FELIS_RELEASE     a published release tag (v1.2.3) the release channel installs, from
+#                     its assets, instead of the newest: the way back to an earlier release.
+#                     Read this script at the same tag. Installers older than this variable
+#                     ignore it and install the newest; for those, FELIS_REF=<tag> builds
+#                     that tag from source
 #   FELIS_IMAGE       control-plane image ref (default:
 #                     registry.felis.svc:5000/felis/felis:<the felis version>, so each
 #                     release has its own tag and `kubectl rollout undo` returns to the
@@ -153,6 +158,8 @@ FELIS_REF="${FELIS_REF:-}"
 # built, so it takes the source path even on the release channel.
 FELIS_REF_PINNED=""
 if [ -n "$FELIS_REF" ]; then FELIS_REF_PINNED=1; fi
+# A published release tag the release channel installs instead of the newest (header).
+FELIS_RELEASE="${FELIS_RELEASE:-}"
 # The directory of release assets to install from (header); empty installs as the channel says.
 FELIS_ARTIFACT_DIR="${FELIS_ARTIFACT_DIR:-}"
 # Set once a prebuilt felis binary is installed at HOST_BIN, by the TUI hand-off, a release
@@ -938,6 +945,18 @@ validate_settings() {
     [ -z "$FELIS_REF_PINNED" ] || die "FELIS_ARTIFACT_DIR and FELIS_REF both name what to install; set one"
     [ -z "${FELIS_SKIP_FETCH:-}" ] || die "FELIS_ARTIFACT_DIR and FELIS_SKIP_FETCH both name what to install; set one"
   fi
+  if [ -n "$FELIS_RELEASE" ]; then
+    [[ "$FELIS_RELEASE" =~ ^v[0-9]+\.[0-9]+\.[0-9]+$ ]] \
+      || die "FELIS_RELEASE must be a release tag like v1.2.3 (got '${FELIS_RELEASE}')"
+    # Each of these names what to install another way and would silently win, installing
+    # something other than the release asked for.
+    [ -z "$FELIS_REF_PINNED" ] || die "FELIS_RELEASE and FELIS_REF both name what to install; set one (FELIS_RELEASE installs a published release's assets, FELIS_REF builds a tree from source)"
+    [ -z "$FELIS_ARTIFACT_DIR" ] || die "FELIS_RELEASE and FELIS_ARTIFACT_DIR both name what to install; set one"
+    [ -z "${FELIS_SKIP_FETCH:-}" ] || die "FELIS_RELEASE and FELIS_SKIP_FETCH both name what to install; set one"
+    [ "$FELIS_VERSION_BOOTSTRAP" = release ] \
+      || die "FELIS_RELEASE names a published release, which the ${FELIS_VERSION_BOOTSTRAP} channel does not install; drop FELIS_VERSION_BOOTSTRAP"
+    ! bootstrap_from_tui || die "FELIS_RELEASE does not reach felis setup's install, which installs the binary it runs as; run the installer one-liner with FELIS_RELEASE instead"
+  fi
   [ "$(heap_megabytes "$FELIS_VELOCITY_XMX")" -ge 256 ] \
     || die "FELIS_VELOCITY_XMX must be a heap size of at least 256M, written <n>M or <n>G (got '${FELIS_VELOCITY_XMX}')"
   case "$FELIS_UPGRADE_DEPS" in
@@ -2567,10 +2586,19 @@ resolve_install_ref() {
   fi
   case "$FELIS_VERSION_BOOTSTRAP" in
     release)
+      if [ -n "$FELIS_RELEASE" ]; then
+        # A named release installs from its own assets, as the newest would: the way back
+        # to an earlier release (docs/troubleshooting.md §16). validate_settings checked
+        # the tag's form; this checks it was published.
+        load_release_json "$FELIS_RELEASE" || die "could not find the published Felis release ${FELIS_RELEASE}.
+  Check the tag against the repository's releases page. If the repository is private, set FELIS_GITHUB_TOKEN to a token with read access to it."
+        FELIS_REF="$FELIS_RELEASE"
+      else
         log "resolving the newest published Felis release"
         FELIS_REF="$(github_latest_tag)" || die "could not resolve the newest Felis release.
   If the repository is private, set FELIS_GITHUB_TOKEN to a token with read access to it.
   If no release has been published yet, set FELIS_VERSION_BOOTSTRAP=dev to build main instead."
+      fi
       # A release IS its tag, so the stamp is final here and stamp_version leaves it be.
       FELIS_VERSION="$FELIS_REF"
       ok "release channel: ${FELIS_REF}"

deploy/bootstrap_test.sh

@@ -3833,6 +3833,57 @@ expect "a FELIS_ARTIFACT_DIR with SHA256SUMS is accepted" "VALID" "$(run_vs "$ad
 expect "FELIS_ARTIFACT_DIR and FELIS_REF together are refused" "DIE: FELIS_ARTIFACT_DIR and FELIS_REF both name what to install" "$(run_vs "$adir" 1)"
 rm -rf "$adir"
 
+# --- FELIS_RELEASE installs one published release, from its assets --------------------------
+# The way back to an earlier release. Without it a rerun resolves the newest release (and
+# migrates again), and FELIS_REF builds from source; anything else that names what to install
+# would silently win over it.
+vrblock="$(awk '/^  if \[ -n "\$FELIS_RELEASE" \]; then$/ { f = 1 } f { print } f && /^  fi$/ { exit }' "$BS")"
+case "$vrblock" in *"FELIS_SKIP_FETCH both"*) ;; *) echo "FAIL: the FELIS_RELEASE checks in validate_settings moved"; exit 1 ;; esac
+run_vr() { # FELIS_RELEASE, with the other settings from the environment
+  FELIS_RELEASE="$1" bash -c 'die() { echo "DIE: $*"; exit 1; }
+bootstrap_from_tui() { [ "${FELIS_BOOTSTRAP_FROM_TUI:-}" = 1 ]; }
+FELIS_REF_PINNED="${FELIS_REF_PINNED:-}" FELIS_ARTIFACT_DIR="${FELIS_ARTIFACT_DIR:-}"
+FELIS_VERSION_BOOTSTRAP="${FELIS_VERSION_BOOTSTRAP:-release}"
+'"$vrblock"'
+echo VALID' 2>&1
+}
+expect "a release tag is accepted" "VALID" "$(run_vr v1.2.3)"
+for bad in 1.2.3 v1.2 main v1.2.3-rc1 'v1.2.3;id'; do
+  expect "FELIS_RELEASE=$bad is refused" "DIE: FELIS_RELEASE must be a release tag like v1.2.3 (got '$bad')" "$(run_vr "$bad")"
+done
+expect "FELIS_RELEASE and FELIS_REF together are refused" "DIE: FELIS_RELEASE and FELIS_REF both name what to install" "$(FELIS_REF_PINNED=1 run_vr v1.2.3)"
+expect "FELIS_RELEASE and FELIS_ARTIFACT_DIR together are refused" "DIE: FELIS_RELEASE and FELIS_ARTIFACT_DIR both name what to install" "$(FELIS_ARTIFACT_DIR=/srv/assets run_vr v1.2.3)"
+expect "FELIS_RELEASE and FELIS_SKIP_FETCH together are refused" "DIE: FELIS_RELEASE and FELIS_SKIP_FETCH both name what to install" "$(FELIS_SKIP_FETCH=1 run_vr v1.2.3)"
+expect "FELIS_RELEASE on the dev channel is refused" "DIE: FELIS_RELEASE names a published release, which the dev channel does not install" "$(FELIS_VERSION_BOOTSTRAP=dev run_vr v1.2.3)"
+expect "FELIS_RELEASE under felis setup is refused" "DIE: FELIS_RELEASE does not reach felis setup's install" "$(FELIS_BOOTSTRAP_FROM_TUI=1 run_vr v1.2.3)"
+
+riblock="$(bsfn resolve_install_ref)"
+[ -n "$riblock" ] && [ "$(printf '%s\n' "$riblock" | wc -l)" -lt 60 ] \
+  || { echo "FAIL: no resolve_install_ref in $BS, or its closing brace moved"; exit 1; }
+urblock="$(bsfn use_release_binary)"
+run_ri() { # FELIS_RELEASE [published tags]
+  FELIS_RELEASE="$1" PUBLISHED="${2:-v1.2.3 v1.4.0}" bash -c 'die() { echo "DIE: $*"; exit 1; }
+log() { :; }
+ok() { echo "OK: $*"; }
+github_latest_tag() { echo "LOOKED UP THE NEWEST" >&2; echo v1.4.0; }
+load_release_json() { case " $PUBLISHED " in *" $1 "*) ;; *) return 1 ;; esac; }
+FELIS_REF="" FELIS_REF_PINNED="" FELIS_VERSION_BOOTSTRAP=release
+'"$riblock"'
+'"$urblock"'
+resolve_install_ref
+use_release_binary && echo "FROM ASSETS" || echo "FROM SOURCE"
+echo "ref=$FELIS_REF version=$FELIS_VERSION"' 2>&1
+}
+out="$(run_ri v1.2.3)"
+expect "a named release is what gets installed" "ref=v1.2.3 version=v1.2.3" "$out"
+expect "from its published assets" "FROM ASSETS" "$out"
+case "$out" in
+  *"LOOKED UP THE NEWEST"*) echo "FAIL a named release still looked up the newest"; fails=$((fails + 1)) ;;
+  *) echo "PASS a named release does not look up the newest" ;;
+esac
+expect "an unpublished release stops the install" "DIE: could not find the published Felis release v1.3.9" "$(run_ri v1.3.9)"
+expect "without one the newest release is installed" "ref=v1.4.0 version=v1.4.0" "$(run_ri "")"
+
 # --- the setup screens' credentials come back from /etc/felis ---------------------------
 # `felis setup` keeps the relay password and the uploads bucket's keys in /etc/felis as
 # well as in their Secrets. A reinstall, or a host rebuilt from a bundle's state/, starts

docs/operations.md

@@ -110,6 +110,10 @@ Installing from the assets is **[VM-VERIFIED]** on CentOS Stream 9 aarch64 throu
 `FELIS_ARTIFACT_DIR`: a fresh install and an upgrade over a release that built on the host
 pulled no image and built nothing, and a rerun imported and uploaded nothing. Downloading them from a
 release is [SH-TESTED] until a release publishes assets.
+The release is the newest one unless `FELIS_RELEASE=<tag>` names an earlier one, which
+installs from that release's assets the same way: the way back after a bad upgrade
+(troubleshooting §16, "Roll back an upgrade that broke the database"), with the installer
+read at that tag.
 
 The installer builds on the host instead, installing Docker for it and stopping Docker once
 the images are in the registry, when:

docs/troubleshooting.md

@@ -2036,8 +2036,28 @@ kubectl -n felis scale deployment felis-api felis-operator --replicas=1
 ```
 
 Do **not** run `felis migrate up` here: the host binary is already the new
-release and would re-apply the migrations you are rolling back. Re-run the
+release and would re-apply the migrations you are rolling back. Bring the host
-older installer version to bring the host binary back in line.
+back in line by installing the earlier release from its own assets, with the
+installer read at that same tag (`v1.2.3` here):
+
+```
+curl -fsSL https://raw.githubusercontent.com/FelisMC/Felis/v1.2.3/deploy/bootstrap.sh \
+  | sudo FELIS_RELEASE=v1.2.3 bash
+```
+
+`FELIS_RELEASE` makes the installer install that release where it would
+otherwise resolve the newest one, which would install the new release again and
+re-apply its migrations. It is refused together with `FELIS_REF`,
+`FELIS_ARTIFACT_DIR`, `FELIS_SKIP_FETCH` or `FELIS_VERSION_BOOTSTRAP=dev`, and
+an unpublished tag stops the install before anything changes. [SH-TESTED]
+
+- An installer older than `FELIS_RELEASE` ignores it and installs the newest.
+  `curl -fsSL <that URL> | grep -c FELIS_RELEASE` prints `0` for one of those;
+  run it with `FELIS_REF=v1.2.3` instead, which builds that tag from source
+  (slower, and it needs the build resources of §15c).
+- While the repository is private, read the installer through the README's
+  token'd form with `?ref=v1.2.3` after `contents/deploy/bootstrap.sh`, and run
+  it as `sudo -E FELIS_RELEASE=v1.2.3 bash`.
 
 ### Whole-host disaster recovery: what comes back, and from where