Fall back to other managers for untethered images

An untethered or uncompressed diskless boot downloaded the root image
only from the deployment server and retried it forever when that server
failed. Try the other managers that answered discovery as well, as the
tethered urlmount already does.

urlmount limits each small range request to 10 seconds, but the single
whole-image download cannot take a total limit. Give up on a connect
after 10 seconds and on a transfer that stalls for 30 seconds instead,
so a hung server moves on to the next one.

confluent_osdeploy/el10-diskless/profiles/default/scripts/imageboot.sh

@@ -13,7 +13,8 @@ fi
 set_selinux_context system_u:object_r:bin_t:s0 /opt/confluent/bin/urlmount
 if [ "untethered" = "$imagemethod" -o "uncompressed" = "$imagemethod" ]; then
     mount -t tmpfs untethered /mnt/remoteimg
-    while ! curl -f https://$confluent_whost/confluent-public/os/$confluent_profile/rootimg.sfs -o /mnt/remoteimg/rootimg.sfs; do
+    # Fall back to the other managers when the deployment server fails
+    while ! for url in https://$confluent_whost/confluent-public/os/$confluent_profile/rootimg.sfs $confluent_urls; do curl -f --connect-timeout 10 --speed-limit 1 --speed-time 30 $url -o /mnt/remoteimg/rootimg.sfs && break; done; do
         echo "Failed downloading image, retrying..."
 	sleep $((RANDOM%3)).$((RANDOM))
     done

confluent_osdeploy/el7-diskless/profiles/default/scripts/imageboot.sh

@@ -2,7 +2,8 @@
 mkdir -p /mnt/remoteimg /mnt/remote /mnt/overlay
 if [ "untethered" = "$(getarg confluent_imagemethod)" ]; then
     mount -t tmpfs untethered /mnt/remoteimg
-    while ! curl -f https://$confluent_mgr/confluent-public/os/$confluent_profile/rootimg.sfs -o /mnt/remoteimg/rootimg.sfs; do
+    # Fall back to the other managers when the deployment server fails
+    while ! for url in https://$confluent_mgr/confluent-public/os/$confluent_profile/rootimg.sfs $confluent_urls; do curl -f --connect-timeout 10 --speed-limit 1 --speed-time 30 $url -o /mnt/remoteimg/rootimg.sfs && break; done; do
         echo "Failed downloading image, retrying..."
 	sleep $((RANDOM%3)).$((RANDOM))
     done

confluent_osdeploy/el8-diskless/profiles/default/scripts/imageboot.sh

@@ -7,7 +7,8 @@ mkdir -p /mnt/remoteimg /mnt/remote /mnt/overlay
 TETHERED=0
 if [ "untethered" = "$(getarg confluent_imagemethod)" ]; then
     mount -t tmpfs untethered /mnt/remoteimg
-    while ! curl -f https://$confluent_whost/confluent-public/os/$confluent_profile/rootimg.sfs -o /mnt/remoteimg/rootimg.sfs; do
+    # Fall back to the other managers when the deployment server fails
+    while ! for url in https://$confluent_whost/confluent-public/os/$confluent_profile/rootimg.sfs $confluent_urls; do curl -f --connect-timeout 10 --speed-limit 1 --speed-time 30 $url -o /mnt/remoteimg/rootimg.sfs && break; done; do
         echo "Failed downloading image, retrying..."
 	sleep $((RANDOM%3)).$((RANDOM))
     done

confluent_osdeploy/el9-diskless/profiles/default/scripts/imageboot.sh

@@ -12,7 +12,8 @@ if grep installtodisk /proc/cmdline > /dev/null; then
 fi
 if [ "untethered" = "$imagemethod" -o "uncompressed" = "$imagemethod" ]; then
     mount -t tmpfs untethered /mnt/remoteimg
-    while ! curl -f https://$confluent_whost/confluent-public/os/$confluent_profile/rootimg.sfs -o /mnt/remoteimg/rootimg.sfs; do
+    # Fall back to the other managers when the deployment server fails
+    while ! for url in https://$confluent_whost/confluent-public/os/$confluent_profile/rootimg.sfs $confluent_urls; do curl -f --connect-timeout 10 --speed-limit 1 --speed-time 30 $url -o /mnt/remoteimg/rootimg.sfs && break; done; do
         echo "Failed downloading image, retrying..."
 	sleep $((RANDOM%3)).$((RANDOM))
     done

confluent_osdeploy/suse15-diskless/profiles/default/scripts/imageboot.sh

@@ -2,7 +2,8 @@
 mkdir -p /mnt/remoteimg /mnt/remote /mnt/overlay
 if [ "untethered" = "$(getarg confluent_imagemethod)" ]; then
     mount -t tmpfs untethered /mnt/remoteimg
-    while ! curl -f https://$confluent_mgr/confluent-public/os/$confluent_profile/rootimg.sfs -o /mnt/remoteimg/rootimg.sfs; do
+    # Fall back to the other managers when the deployment server fails
+    while ! for url in https://$confluent_mgr/confluent-public/os/$confluent_profile/rootimg.sfs $confluent_urls; do curl -f --connect-timeout 10 --speed-limit 1 --speed-time 30 $url -o /mnt/remoteimg/rootimg.sfs && break; done; do
         echo "Failed downloading image, retrying..."
 	sleep $((RANDOM%3)).$((RANDOM))
     done

confluent_osdeploy/suse16-diskless/profiles/default/scripts/imageboot.sh

@@ -2,7 +2,8 @@
 mkdir -p /mnt/remoteimg /mnt/remote /mnt/overlay
 if [ "untethered" = "$(getarg confluent_imagemethod)" ]; then
     mount -t tmpfs untethered /mnt/remoteimg
-    while ! curl -f https://$confluent_mgr/confluent-public/os/$confluent_profile/rootimg.sfs -o /mnt/remoteimg/rootimg.sfs; do
+    # Fall back to the other managers when the deployment server fails
+    while ! for url in https://$confluent_mgr/confluent-public/os/$confluent_profile/rootimg.sfs $confluent_urls; do curl -f --connect-timeout 10 --speed-limit 1 --speed-time 30 $url -o /mnt/remoteimg/rootimg.sfs && break; done; do
         echo "Failed downloading image, retrying..."
 	sleep $((RANDOM%3)).$((RANDOM))
     done

confluent_osdeploy/ubuntu20.04-diskless/profiles/default/scripts/imageboot.sh

@@ -34,7 +34,8 @@ TETHERED=1
 if [ "$imagemethod" != tethered ]; then
     TETHERED=0
     mount -t tmpfs untethered /mnt/remoteimg
-    while ! curl -f https://$confluent_mgr/confluent-public/os/$confluent_profile/rootimg.sfs -o /mnt/remoteimg/rootimg.sfs; do
+    # Fall back to the other managers when the deployment server fails
+    while ! for url in https://$confluent_mgr/confluent-public/os/$confluent_profile/rootimg.sfs $confluent_urls; do curl -f --connect-timeout 10 --speed-limit 1 --speed-time 30 $url -o /mnt/remoteimg/rootimg.sfs && break; done; do
         echo "Failed downloading image, retrying..."
 	sleep $((RANDOM%3)).$((RANDOM))
     done