portainer: reopen Portainer's admin-init window when it has closed

Portainer stops accepting POST /api/users/admin/init a few minutes after start
and answers 303 with Redirect-Reason: AdminInitTimeout. Any transient failure
during that window therefore made the module permanently un-bootstrappable.
update.sh now restarts the container to reset the timer, waits for the API and
retries once, re-reading the setup token because a fresh one is minted at every
start.

Also splits the OIDC precondition: the single condition reported the secrets env
as missing whenever the admin session was absent, which is what sent the first
debugging pass down the wrong path.

src/containers/portainer/update.sh

@@ -142,18 +142,40 @@ portainer_jwt() {
         -d '{\"Username\":\"admin\",\"Password\":\"${ADMIN_PW}\"}'" 2>/dev/null | jq -r '.jwt // empty'
 }
 
+wait_for_api() {
+    local code
+    for _ in $(seq 1 24); do
+        code="$(vm "curl -fsk -o /dev/null -w '%{http_code}' https://localhost:9443/api/status 2>/dev/null" || echo 000)"
+        [[ "${code}" == "200" ]] && return 0
+        sleep 5
+    done
+    return 1
+}
+
+# Echoes the HTTP status of an admin-init attempt. The setup token is minted
+# afresh at every container start, so re-read it each time.
+init_admin() {
+    local tok hdr=""
+    tok="$(vm "sudo podman logs ${CONTAINER} 2>&1 | grep setup_token | grep -oE '[0-9a-f]{64}' | tail -1" | tr -d '\r')"
+    [[ -n "${tok}" ]] && hdr="-H 'X-Setup-Token: ${tok}'"
+    vm "curl -sk -o /dev/null -w '%{http_code}' -X POST https://localhost:9443/api/users/admin/init \
+        -H 'Content-Type: application/json' ${hdr} \
+        -d '{\"Username\":\"admin\",\"Password\":\"${ADMIN_PW}\"}'" 2>/dev/null || echo 000
+}
+
 JWT="$(portainer_jwt)"
 if [[ -z "${JWT}" ]]; then
     info "  Bootstrapping the break-glass admin account..."
-    # Portainer >= 2.39 prints a one-time setup token at startup and refuses
-    # admin creation without it (HTTP 403). The log line wraps the value in ANSI
-    # colour codes, so match the 64-hex token rather than "setup_token=<value>".
-    SETUP_TOKEN="$(vm "sudo podman logs ${CONTAINER} 2>&1 | grep setup_token | grep -oE '[0-9a-f]{64}' | tail -1" | tr -d '\r')"
-    TOKEN_HDR=""
-    [[ -n "${SETUP_TOKEN}" ]] && TOKEN_HDR="-H 'X-Setup-Token: ${SETUP_TOKEN}'"
-    init_code="$(vm "curl -sk -o /dev/null -w '%{http_code}' -X POST https://localhost:9443/api/users/admin/init \
-        -H 'Content-Type: application/json' ${TOKEN_HDR} \
-        -d '{\"Username\":\"admin\",\"Password\":\"${ADMIN_PW}\"}'" || echo 000)"
+    init_code="$(init_admin)"
+    if [[ "${init_code}" == "303" ]]; then
+        # Portainer closes the admin-init window a few minutes after start
+        # (Redirect-Reason: AdminInitTimeout). Without this the module can never
+        # be bootstrapped again after any transient failure — restarting resets
+        # the timer and mints a new setup token.
+        info "  admin-init window had closed — restarting ${CONTAINER} to reopen it"
+        vm "sudo podman restart ${CONTAINER} >/dev/null" || warn "  restart failed"
+        wait_for_api && init_code="$(init_admin)"
+    fi
     case "${init_code}" in
         200|204) info "  admin created (password in ${ADMIN_SECRET} on the VM)" ;;
         409)     warn "  an admin exists but ${ADMIN_SECRET} does not match it — reset it by hand" ;;
@@ -167,7 +189,11 @@ fi
 # ── 5. Point Portainer at TAPPaaS identity (OIDC) ────────────────────
 # identity:identity wrote these three values; if they are missing the module is
 # still usable with the local admin, so warn rather than fail.
-if [[ -n "${JWT:-}" ]] && vm "sudo test -s ${SECRETS_ENV}" 2>/dev/null; then
+if [[ -z "${JWT:-}" ]]; then
+    warn "  no admin session — skipping OIDC configuration (see the admin init warning above)"
+elif ! vm "sudo test -s ${SECRETS_ENV}" 2>/dev/null; then
+    warn "  ${SECRETS_ENV} missing — is identity:identity in dependsOn?"
+else
     info "  Configuring OIDC login against Authentik..."
     CLIENT_ID="$(vm "sudo sh -c '. ${SECRETS_ENV}; printf %s \"\$OIDC_CLIENT_ID\"'" | tr -d '\r')"
     CLIENT_SECRET="$(vm "sudo sh -c '. ${SECRETS_ENV}; printf %s \"\$OIDC_CLIENT_SECRET\"'" | tr -d '\r')"
@@ -213,8 +239,6 @@ if [[ -n "${JWT:-}" ]] && vm "sudo test -s ${SECRETS_ENV}" 2>/dev/null; then
     else
         warn "  ${SECRETS_ENV} did not carry all three OIDC values — skipping OIDC configuration"
     fi
-else
-    warn "  ${SECRETS_ENV} missing — is identity:identity in dependsOn? Local admin login still works."
 fi
 
 echo ""