Browse code

Merge "Revert "Build retry loop for screen sessions""

Jenkins authored on 2014/06/29 01:00:33
Showing 1 changed files
... ...
@@ -1058,100 +1058,44 @@ function run_process {
1058 1058
     echo $!
1059 1059
 }
1060 1060
 
1061
-function _start_in_screen {
1062
-    local service=$1
1063
-    local cmd=$2
1064
-    local screen_name=${SCREEN_NAME:-stack}
1065
-    local status_dir=${SERVICE_DIR:-${DEST}/status}
1066
-    local service_dir="$status_dir/$screen_name"
1067
-    local pid="$service_dir/$service.pid"
1068
-    local failure="$service_dir/$service.failure"
1069
-
1070
-    if [[ -n ${SCREEN_LOGDIR} ]]; then
1071
-        local logfile=${SCREEN_LOGDIR}/screen-${service}.${CURRENT_LOG_TIME}.log
1072
-        local shortlog=${SCREEN_LOGDIR}/screen-${service}.log
1073
-        # this whole dance is done because of slow nodes
1074
-        screen -S $screen_name -p $service -X logfile ${logfile}
1075
-        screen -S $screen_name -p $service -X log on
1076
-        ln -sf ${logfile} ${shortlog}
1077
-    fi
1078
-
1079
-    NL=`echo -ne '\015'`
1080
-    # This fun command does the following:
1081
-    # - the passed server command is backgrounded
1082
-    # - the pid of the background process is saved in the usual place
1083
-    # - the server process is brought back to the foreground
1084
-    # - if the server process exits prematurely the fg command errors
1085
-    #   and a message is written to stdout and the service failure file
1086
-    # The pid saved can be used in screen_stop() as a process group
1087
-    # id to kill off all child processes
1088
-    echo "Running: $cmd & echo \$! >$pid; fg || echo \"$service failed to start\" | tee \"$failure\"$NL"
1089
-    screen -S $screen_name -p $service -X stuff "$cmd & echo \$! >$pid; fg || echo \"$service failed to start\" | tee \"$failure\"$NL"
1090
-}
1091
-
1092
-
1093
-function _is_running_in_screen {
1094
-    local service=$1
1095
-    local screen_name=${SCREEN_NAME:-stack}
1096
-    local status_dir=${SERVICE_DIR:-${DEST}/status}
1097
-    local service_dir="$status_dir/$screen_name"
1098
-    local pid="$service_dir/$service.pid"
1099
-    local failure="$service_dir/$service.failure"
1100
-    if [[ ! -e "$pid" && ! -e "$failure" ]]; then
1101
-        # if we don't have a pid or a failure for why, the command may not
1102
-        # have stuffed in there
1103
-        echo "Warning: neither $pid nor $failure exist, $service didn't seem to start"
1104
-        return 1
1105
-    fi
1106
-    if [[ -n ${SCREEN_LOGDIR} ]]; then
1107
-        # if we should be logging, but we don't have a log file, something is wrong
1108
-        local logfile=${SCREEN_LOGDIR}/screen-${service}.${CURRENT_LOG_TIME}.log
1109
-        if [[ ! -e "$logfile" ]]; then
1110
-            echo "Warning: expected logfile $logfile not found, something wrong with starting $service"
1111
-            return 1
1112
-        fi
1113
-    fi
1114
-    return 0
1115
-}
1116
-
1117 1061
 # Helper to launch a service in a named screen
1118 1062
 # screen_it service "command-line"
1119 1063
 function screen_it {
1120
-    local service=$1
1121
-    local cmd=$2
1122
-    local screen_name=${SCREEN_NAME:-stack}
1123
-    local status_dir=${SERVICE_DIR:-${DEST}/status}
1124
-    local service_dir="$status_dir/$screen_name"
1125
-    local use_screen=$(trueorfalse True $USE_SCREEN)
1126
-    local pid="$service_dir/$service.pid"
1064
+    SCREEN_NAME=${SCREEN_NAME:-stack}
1065
+    SERVICE_DIR=${SERVICE_DIR:-${DEST}/status}
1066
+    USE_SCREEN=$(trueorfalse True $USE_SCREEN)
1127 1067
 
1128 1068
     if is_service_enabled $1; then
1129 1069
         # Append the service to the screen rc file
1130
-        screen_rc "$service" "$cmd"
1131
-
1132
-        if [[ "$use_screen" = "True" ]]; then
1133
-            screen -S $screen_name -X screen -t $service
1134
-
1135
-            # this retry loop brought to you by slow compute nodes, screen raciness,
1136
-            # and frustration in upgrading.
1137
-            local screen_tries=0
1138
-            while [ "$screen_tries" -lt 10 ]; do
1139
-                _start_in_screen "$service" "$cmd"
1140
-                if _is_running_in_screen $service; then
1141
-                    screen_tries=10
1142
-                else
1143
-                    screen_tries=$[screen_tries + 1]
1144
-                    echo "Failed to start service after $screen_tries attempt(s), retrying"
1145
-                    if [[ "$screen_tries" -eq 10 ]]; then
1146
-                        echo "Too many retries, giving up"
1147
-                        exit 1
1148
-                    fi
1149
-                    sleep 1
1150
-                fi
1151
-            done
1070
+        screen_rc "$1" "$2"
1071
+
1072
+        if [[ "$USE_SCREEN" = "True" ]]; then
1073
+            screen -S $SCREEN_NAME -X screen -t $1
1074
+
1075
+            if [[ -n ${SCREEN_LOGDIR} ]]; then
1076
+                screen -S $SCREEN_NAME -p $1 -X logfile ${SCREEN_LOGDIR}/screen-${1}.${CURRENT_LOG_TIME}.log
1077
+                screen -S $SCREEN_NAME -p $1 -X log on
1078
+                ln -sf ${SCREEN_LOGDIR}/screen-${1}.${CURRENT_LOG_TIME}.log ${SCREEN_LOGDIR}/screen-${1}.log
1079
+            fi
1080
+
1081
+            # sleep to allow bash to be ready to be send the command - we are
1082
+            # creating a new window in screen and then sends characters, so if
1083
+            # bash isn't running by the time we send the command, nothing happens
1084
+            sleep 3
1085
+
1086
+            NL=`echo -ne '\015'`
1087
+            # This fun command does the following:
1088
+            # - the passed server command is backgrounded
1089
+            # - the pid of the background process is saved in the usual place
1090
+            # - the server process is brought back to the foreground
1091
+            # - if the server process exits prematurely the fg command errors
1092
+            #   and a message is written to stdout and the service failure file
1093
+            # The pid saved can be used in screen_stop() as a process group
1094
+            # id to kill off all child processes
1095
+            screen -S $SCREEN_NAME -p $1 -X stuff "$2 & echo \$! >$SERVICE_DIR/$SCREEN_NAME/$1.pid; fg || echo \"$1 failed to start\" | tee \"$SERVICE_DIR/$SCREEN_NAME/$1.failure\"$NL"
1152 1096
         else
1153 1097
             # Spawn directly without screen
1154
-            run_process "$service" "$cmd" >$pid
1098
+            run_process "$1" "$2" >$SERVICE_DIR/$SCREEN_NAME/$1.pid
1155 1099
         fi
1156 1100
     fi
1157 1101
 }