space-separated hosts don't work anymore

howto/upgrades.md

@@ -435,24 +435,24 @@ This routine should be able to reboot all hosts with a `rebootPolicy`
 defined to `justdoit` or `rotation`:
 
     echo "rebooting 'justdoit' hosts with a 10-minute delay, every 2 minutes...."
-    fab -H $(ssh db.torproject.org 'ldapsearch -H ldap://db.torproject.org -x -ZZ -b ou=hosts,dc=torproject,dc=org -LLL "(rebootPolicy=justdoit)" hostname | awk "\$1 == \"hostname:\" {print \$2}" | sort -R') reboot-host --delay-shutdown=10 --delay-hosts=120
+    fab -H $(ssh db.torproject.org 'ldapsearch -H ldap://db.torproject.org -x -ZZ -b ou=hosts,dc=torproject,dc=org -LLL "(rebootPolicy=justdoit)" hostname | awk "\$1 == \"hostname:\" {print \$2}" | sort -R' | sed 's/ /,/g') reboot-host --delay-shutdown=10 --delay-hosts=120
 
     echo "rebooting 'rotation' hosts with a 10-minute delay, every 30 minutes...."
-    fab -H $(ssh db.torproject.org 'ldapsearch -H ldap://db.torproject.org -x -ZZ -b ou=hosts,dc=torproject,dc=org -LLL "(rebootPolicy=rotation)" hostname | awk "\$1 == \"hostname:\" {print \$2}" | sort -R') reboot-host --delay-shutdown=10 --delay-hosts=1800
+    fab -H $(ssh db.torproject.org 'ldapsearch -H ldap://db.torproject.org -x -ZZ -b ou=hosts,dc=torproject,dc=org -LLL "(rebootPolicy=rotation)" hostname | awk "\$1 == \"hostname:\" {print \$2}" | sort -R' | sed 's/ /,/g') reboot-host --delay-shutdown=10 --delay-hosts=1800
 
 Another example, this will reboot all hosts running Debian `bookworm`,
 in random order:
 
-    fab -H $(ssh puppetdb-01.torproject.org "curl -s -G http://localhost:8080/pdb/query/v4 --data-urlencode 'query=inventory[certname] { facts.os.distro.codename = \"bookworm\" }'" | jq -r '.[].certname' | sort -R)
+    fab -H $(ssh puppetdb-01.torproject.org "curl -s -G http://localhost:8080/pdb/query/v4 --data-urlencode 'query=inventory[certname] { facts.os.distro.codename = \"bookworm\" }'" | jq -r '.[].certname' | sort -R | sed 's/ /,/g')
 
 And this will reboot all hosts with a pending kernel upgrade (updates
 only when puppet agent runs), again in random order:
 
-    fab -H $(ssh puppetdb-01.torproject.org "curl -s -G http://localhost:8080/pdb/query/v4 --data-urlencode 'query=inventory[certname] { facts.apt_reboot_required = true }'" | jq -r '.[].certname' | sort -R)
+    fab -H $(ssh puppetdb-01.torproject.org "curl -s -G http://localhost:8080/pdb/query/v4 --data-urlencode 'query=inventory[certname] { facts.apt_reboot_required = true }'" | jq -r '.[].certname' | sort -R | sed 's/ /,/g')
 
 And this is the list of all *physical* hosts with a pending upgrade, alphabetically:
 
-    fab -H $(ssh puppetdb-01.torproject.org "curl -s -G http://localhost:8080/pdb/query/v4 --data-urlencode 'query=inventory[certname] { facts.apt_reboot_required = true and facts.virtual = \"physical\" }'" | jq -r '.[].certname'  | sort)
+    fab -H $(ssh puppetdb-01.torproject.org "curl -s -G http://localhost:8080/pdb/query/v4 --data-urlencode 'query=inventory[certname] { facts.apt_reboot_required = true and facts.virtual = \"physical\" }'" | jq -r '.[].certname'  | sort | sed 's/ /,/g')
 
 ## Rebooting Ganeti nodes