Bug: Small CPU spikes every 5 seconds

Is this urgent?

Host OS

Manjaro Linux

CPU arch

x86_64

VPN service provider

ProtonVPN

What are you using to run the container

docker-compose

What is the version of Gluetun

2022-02-26T23:00:01.006Z (commit 006b218)

What's the problem 🤔

Every 5 seconds I get a small CPU spike of 3% to 6% for less than a second. Even when the proxy should be completely idle.

I suspect that this could be the health check or another network call. With each spike docker stats says that ~0.3 kb are being uploaded and downloaded.

I would prefer an option for the container to not make frequent network calls and avoid regular CPU spikes.

Share your logs

Running version latest built on 2022-02-26T23:00:01.006Z (commit 006b218)

🔧 Need help? https://github.com/qdm12/gluetun/discussions/new
🐛 Bug? https://github.com/qdm12/gluetun/issues/new
✨ New feature? https://github.com/qdm12/gluetun/issues/new
☕ Discussion? https://github.com/qdm12/gluetun/discussions/new
💻 Email? quentin.mcgaw@gmail.com
💰 Help me? https://www.paypal.me/qmcgaw https://github.com/sponsors/qdm12
2022/03/04 22:23:59 INFO routing: default route found: interface eth0, gateway 172.24.0.1
2022/03/04 22:23:59 INFO routing: local ethernet link found: eth0
2022/03/04 22:23:59 INFO routing: local ipnet found: 172.24.0.0/16
2022/03/04 22:23:59 INFO firewall: enabling...
2022/03/04 22:23:59 INFO firewall: enabled successfully
2022/03/04 22:23:59 INFO storage: merging by most recent 11096 hardcoded servers and 11096 servers read from /gluetun/servers.json
2022/03/04 22:23:59 INFO Alpine version: 3.15.0
2022/03/04 22:23:59 INFO OpenVPN 2.4 version: 2.4.11
2022/03/04 22:23:59 INFO OpenVPN 2.5 version: 2.5.4
2022/03/04 22:23:59 INFO Unbound version: 1.13.2
2022/03/04 22:23:59 INFO IPtables version: v1.8.7
2022/03/04 22:23:59 INFO Settings summary:
├── VPN settings:
|   ├── VPN provider settings:
|   |   ├── Name: protonvpn
|   |   └── Server selection settings:
|   |       ├── VPN type: openvpn
|   |       ├── Countries: germany
|   |       └── OpenVPN server selection settings:
|   |           └── Protocol: UDP
|   └── OpenVPN settings:
|       ├── OpenVPN version: 2.5
|       ├── User: [set]
|       ├── Password: [set]
|       ├── Tunnel IPv6: no
|       ├── Network interface: tun0
|       ├── Run OpenVPN as: root
|       └── Verbosity level: 1
├── DNS settings:
|   ├── DNS server address to use: 127.0.0.1
|   ├── Keep existing nameserver(s): no
|   └── DNS over TLS settings:
|       └── Enabled: no
├── Firewall settings:
|   └── Enabled: yes
├── Log settings:
|   └── Log level: INFO
├── Health settings:
|   ├── Server listening address: 127.0.0.1:9999
|   ├── Address to ping: github.com
|   └── VPN wait durations:
|       ├── Initial duration: 5s
|       └── Additional duration: 5s
├── Shadowsocks server settings:
|   └── Enabled: no
├── HTTP proxy settings:
|   ├── Enabled: yes
|   ├── Listening address: :8888
|   ├── User: 
|   ├── Password: [not set]
|   ├── Stealth mode: no
|   └── Log: no
├── Control server settings:
|   ├── Listening address: :8000
|   └── Logging: no
├── OS Alpine settings:
|   ├── Process UID: 1000
|   └── Process GID: 1000
├── Public IP settings:
|   ├── Fetching: every 12h0m0s
|   └── IP file path: /tmp/gluetun/ip
└── Version settings:
    └── Enabled: yes
2022/03/04 22:23:59 INFO routing: default route found: interface eth0, gateway 172.24.0.1
2022/03/04 22:23:59 INFO routing: adding route for 0.0.0.0/0
2022/03/04 22:23:59 INFO firewall: setting allowed subnets...
2022/03/04 22:23:59 INFO routing: default route found: interface eth0, gateway 172.24.0.1
2022/03/04 22:23:59 INFO TUN device is not available: open /dev/net/tun: no such file or directory; creating it...
2022/03/04 22:23:59 INFO pprof http server listening on [::]:6060
2022/03/04 22:23:59 INFO dns over tls: using plaintext DNS at address 1.1.1.1
2022/03/04 22:23:59 INFO healthcheck: listening on 127.0.0.1:9999
2022/03/04 22:23:59 INFO http proxy: listening on :8888
2022/03/04 22:23:59 INFO firewall: allowing VPN connection...
2022/03/04 22:23:59 INFO http server: listening on :8000
2022/03/04 22:23:59 INFO openvpn: OpenVPN 2.5.4 x86_64-alpine-linux-musl [SSL (OpenSSL)] [LZO] [LZ4] [EPOLL] [MH/PKTINFO] [AEAD] built on Nov 15 2021
2022/03/04 22:23:59 INFO openvpn: library versions: OpenSSL 1.1.1l  24 Aug 2021, LZO 2.10
2022/03/04 22:23:59 INFO openvpn: TCP/UDP: Preserving recently used remote address: [AF_INET]185.159.158.157:1194
2022/03/04 22:23:59 INFO openvpn: UDP link local: (not bound)
2022/03/04 22:23:59 INFO openvpn: UDP link remote: [AF_INET]185.159.158.157:1194
2022/03/04 22:24:00 WARN openvpn: 'link-mtu' is used inconsistently, local='link-mtu 1633', remote='link-mtu 1634'
2022/03/04 22:24:00 WARN openvpn: 'comp-lzo' is present in remote config but missing in local config, remote='comp-lzo'
2022/03/04 22:24:00 INFO openvpn: [lxc-de-11.protonvpn.com] Peer Connection Initiated with [AF_INET]185.159.158.157:1194
2022/03/04 22:24:01 INFO openvpn: setsockopt TCP_NODELAY=1 failed
2022/03/04 22:24:01 INFO openvpn: TUN/TAP device tun0 opened
2022/03/04 22:24:01 INFO openvpn: /sbin/ip link set dev tun0 up mtu 1500
2022/03/04 22:24:01 INFO openvpn: /sbin/ip link set dev tun0 up
2022/03/04 22:24:01 INFO openvpn: /sbin/ip addr add dev tun0 10.31.0.3/16
2022/03/04 22:24:01 INFO openvpn: UID set to nonrootuser
2022/03/04 22:24:01 INFO openvpn: Initialization Sequence Completed
2022/03/04 22:24:07 INFO healthcheck: healthy!
2022/03/04 22:24:07 INFO vpn: You are running on the bleeding edge of latest!
2022/03/04 22:24:07 INFO ip getter: Public IP address is xx.xx.xx.xx (Germany, xx, xx)

Share your configuration

version: "3"
services:
  gluetun:
    image: qmcgaw/gluetun
    cap_add:
      - NET_ADMIN
    environment:
      - VPN_SERVICE_PROVIDER=protonvpn
      - OPENVPN_USER=xxxx
      - OPENVPN_PASSWORD=xxxx
      - SERVER_COUNTRIES=Germany
      - HTTPPROXY=on
      - DOT=off
      - HTTP_CONTROL_SERVER_LOG=off
    ports:
      - 8889:8888

qdm12 / gluetun

Bug: Small CPU spikes every 5 seconds #879