healthcheck for rpc task (#15)

Author: baabeetaa

rpc/healthcheck.sh

@@ -0,0 +1,36 @@
+#!/bin/bash
+
+BLOCKCHAIN_TIME=$(curl --silent --max-time 3 "http://localhost/status" |jq -r .result.sync_info.latest_block_time)
+
+if [[ ${BLOCKCHAIN_TIME} == "null" ]]; then
+  echo Status: 502
+  echo Content-type:text/plain
+  echo
+  echo The node is currently not responding.
+  exit 0
+fi
+
+if [[ ! -z  "$BLOCKCHAIN_TIME" ]]; then
+  BLOCKCHAIN_SECS=`date -d $BLOCKCHAIN_TIME +%s`
+  CURRENT_SECS=`date +%s`
+
+  # if within 60 seconds of current time, call it synced and report healthy
+  BLOCK_AGE=$((${CURRENT_SECS} - ${BLOCKCHAIN_SECS}))
+
+  if [[ ${BLOCK_AGE} -le 60 ]]; then
+    echo Status: 200
+    echo Content-type:text/plain
+    echo
+    echo latest_block_time is less than 60 seconds, this node is considered healthy.
+  else
+    echo Status: 503
+    echo Content-type:text/plain
+    echo
+    echo latest_block_time is higher than 60 seconds, this node is responding but not synced
+  fi
+else
+  echo Status: 502
+  echo Content-type:text/plain
+  echo
+  echo The node is currently not responding.
+fi

rpc/nginx.conf

@@ -0,0 +1,70 @@
+
+#user http;
+worker_processes  1;
+
+#error_log  logs/error.log;
+#error_log  logs/error.log  notice;
+#error_log  logs/error.log  info;
+
+#pid        logs/nginx.pid;
+
+
+events {
+    worker_connections  1024;
+}
+
+
+http {
+    include       mime.types;
+    default_type  application/octet-stream;
+
+    #log_format  main  '$remote_addr - $remote_user [$time_local] "$request" '
+    #                  '$status $body_bytes_sent "$http_referer" '
+    #                  '"$http_user_agent" "$http_x_forwarded_for"';
+
+    #access_log  logs/access.log  main;
+
+    sendfile        on;
+    #tcp_nopush     on;
+
+    #keepalive_timeout  0;
+    keepalive_timeout  65;
+
+    #gzip  on;
+
+    resolver 127.0.0.11  valid=30s;   # Docker's DNS server
+
+    server {
+        listen       80;
+        server_name  localhost;
+        #charset koi8-r;
+
+        #access_log  logs/host.access.log  main;
+
+        location / {
+            proxy_http_version 1.1;
+            proxy_set_header Upgrade $http_upgrade;
+            proxy_set_header Connection "upgrade";
+            proxy_set_header X-Real-IP $remote_addr;
+            proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
+            proxy_set_header Host $http_host;
+            proxy_set_header X-NginX-Proxy true;
+
+            proxy_pass http://localhost:26657/;
+        }
+
+        location /healthcheck {
+            fastcgi_param SCRIPT_FILENAME /usr/share/nginx/html/healthcheck.sh;
+            fastcgi_pass unix:/var/run/fcgiwrap.socket;
+        }
+
+        #error_page  404              /404.html;
+
+        # redirect server error pages to the static page /50x.html
+        #
+        error_page   500 502 503 504  /50x.html;
+        location = /50x.html {
+            root   /usr/share/nginx/html;
+        }
+    }
+}

rpc/quicksync.sh

@@ -52,7 +52,7 @@ then
   exit
 fi
 
-pacman -Syu --noconfirm go git base-devel wget jq $pacman_pkgs
+pacman -Syu --noconfirm go git base-devel wget jq nginx spawn-fcgi fcgiwrap $pacman_pkgs
 
 echo "#################################################################################################################"
 echo "build from source:"
@@ -242,5 +242,14 @@ fi
 echo "download addrbook..."
 curl -Ls  $proxy_cache_url$addrbook_url > $node_home/config/addrbook.json
 
-# start chain
+echo "#################################################################################################################"
+echo "start nginx..."
+curl -Ls "https://raw.githubusercontent.com/baabeetaa/cosmosia/main/rpc/nginx.conf" > /etc/nginx/nginx.conf
+curl -Ls "https://raw.githubusercontent.com/baabeetaa/cosmosia/main/rpc/healthcheck.sh" > /usr/share/nginx/html/healthcheck.sh
+chmod +x /usr/share/nginx/html/healthcheck.sh
+spawn-fcgi -s /var/run/fcgiwrap.socket -M 766 /usr/sbin/fcgiwrap
+/usr/sbin/nginx
+
+echo "#################################################################################################################"
+echo "start chain..."
 $HOME/go/bin/$daemon_name start $start_flags