[GitHub] [apisix] monkeyDluffy6017 commented on a diff in pull request #7869: fix: reload once when log rotate

[GitBox <gi...@apache.org>]

monkeyDluffy6017 commented on code in PR #7869:
URL: https://github.com/apache/apisix/pull/7869#discussion_r964429386


##########
apisix/plugins/log-rotate.lua:
##########
@@ -218,25 +221,42 @@ local function file_size(file)
 end
 
 
-local function rotate_file(files, now_time, max_kept)
+local function rotate_file(files, now_time, max_kept, wait_time)
+    if isempty(files) then
+        return
+    end
+
+    local new_files = new_tab(2, 0)
+    -- rename the log files
     for _, file in ipairs(files) do
         local now_date = os_date("%Y-%m-%d_%H-%M-%S", now_time)
         local new_file = rename_file(default_logs[file], now_date)
         if not new_file then
             return
         end
 
-        local pid = process.get_master_pid()
-        core.log.warn("send USR1 signal to master process [", pid, "] for reopening log file")
-        local ok, err = signal.kill(pid, signal.signum("USR1"))
-        if not ok then
-            core.log.error("failed to send USR1 signal for reopening log file: ", err)
-        end
+        tab_insert(new_files, new_file)
+    end
+
+    -- send signal to reopen log files
+    local pid = process.get_master_pid()
+    core.log.warn("send USR1 signal to master process [", pid, "] for reopening log file")
+    local ok, err = signal.kill(pid, signal.signum("USR1"))
+    if not ok then
+        core.log.error("failed to send USR1 signal for reopening log file: ", err)
+    end
+
+    if enable_compression then
+        -- Waiting for nginx reopen files
+        -- to avoid losing logs during compression
+        ngx_sleep(wait_time)

Review Comment:
   `wait_time` is just 0.5s by default. rotation time is much lager than 0.5s, right?



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