Allow configuration of logrorate in GCE

cluster/common.sh

@@ -759,7 +759,9 @@ EOF
 
     for var_name in ${PROVIDER_VARS}; do
       eval "local var_value=\$(yaml-quote \${${var_name}})"
-      echo "${var_name}: ${var_value}" >>$file
+      cat >>$file <<EOF
+${var_name}: ${var_value}
+EOF
     done
   fi
 

cluster/gce/config-default.sh

@@ -229,7 +229,7 @@ if [ ${ENABLE_IP_ALIASES} = true ]; then
   # the subnet and is the range used for node instance IPs.
   NODE_IP_RANGE="$(get-node-ip-range)"
   # Add to the provider custom variables.
-  PROVIDER_VARS="${PROVIDER_VARS} ENABLE_IP_ALIASES"
+  PROVIDER_VARS="${PROVIDER_VARS:-} ENABLE_IP_ALIASES"
 fi
 
 # Admission Controllers to invoke prior to persisting objects in cluster
@@ -278,3 +278,10 @@ SOFTLOCKUP_PANIC="${SOFTLOCKUP_PANIC:-false}" # true, false
 METADATA_CLOBBERS_CONFIG="${METADATA_CLOBBERS_CONFIG:-false}"
 
 ENABLE_BIG_CLUSTER_SUBNETS="${ENABLE_BIG_CLUSTER_SUBNETS:-false}"
+
+if [[ -n "${LOGROTATE_FILES_MAX_COUNT:-}" ]]; then
+  PROVIDER_VARS="${PROVIDER_VARS:-} LOGROTATE_FILES_MAX_COUNT"
+fi
+if [[ -n "${LOGROTATE_MAX_SIZE:-}" ]]; then
+  PROVIDER_VARS="${PROVIDER_VARS:-} LOGROTATE_MAX_SIZE"
+fi

cluster/gce/config-test.sh

@@ -263,7 +263,7 @@ if [ ${ENABLE_IP_ALIASES} = true ]; then
   # the subnet and is the range used for node instance IPs.
   NODE_IP_RANGE="${NODE_IP_RANGE:-10.40.0.0/22}"
   # Add to the provider custom variables.
-  PROVIDER_VARS="${PROVIDER_VARS} ENABLE_IP_ALIASES"
+  PROVIDER_VARS="${PROVIDER_VARS:-} ENABLE_IP_ALIASES"
 fi
 
 # If we included ResourceQuota, we should keep it at the end of the list to prevent incrementing quota usage prematurely.
@@ -327,3 +327,10 @@ if [[ "${ENABLE_APISERVER_ADVANCED_AUDIT}" == "true" ]]; then
 fi
 
 ENABLE_BIG_CLUSTER_SUBNETS="${ENABLE_BIG_CLUSTER_SUBNETS:-false}"
+
+if [[ -n "${LOGROTATE_FILES_MAX_COUNT:-}" ]]; then
+  PROVIDER_VARS="${PROVIDER_VARS:-} LOGROTATE_FILES_MAX_COUNT"
+fi
+if [[ -n "${LOGROTATE_MAX_SIZE:-}" ]]; then
+  PROVIDER_VARS="${PROVIDER_VARS:-} LOGROTATE_MAX_SIZE"
+fi

cluster/gce/gci/configure-helper.sh

@@ -163,12 +163,12 @@ function setup-logrotate() {
   # * keep only 5 old (rotated) logs, and will discard older logs.
   cat > /etc/logrotate.d/allvarlogs <<EOF
 /var/log/*.log {
-    rotate 5
+    rotate ${LOGROTATE_FILES_MAX_COUNT:-5}
     copytruncate
     missingok
     notifempty
     compress
-    maxsize 100M
+    maxsize ${LOGROTATE_MAX_SIZE:-100M}
     daily
     dateext
     dateformat -%Y%m%d-%s