Agent version rollback

[bdfama]

Provide safe rollback controls for deployed agent versions to recover quickly from regressions.

[mrezael6798-commits]

cat < /etc/security/limits.conf
root hard nofile 1048576
root soft nofile 1048576

• hard nofile 1048576
• soft nofile 1048576
  root hard nproc unlimited
  root soft nproc unlimited
• hard nproc unlimited
• soft nproc unlimited
  root hard memlock unlimited
  root soft memlock unlimited
• hard memlock unlimited
• soft memlock unlimited
  EOT
  cat < /etc/systemd/system.conf
  [Manager]
  DefaultTasksMax=infinity
  DefaultLimitNOFILE=infinity
  DefaultLimitNPROC=infinity
  DefaultLimitMEMLOCK=infinity
  DefaultLimitLOCKS=infinity
  EOT
  cat < /etc/systemd/user.conf
  [Manager]
  DefaultTasksMax=infinity
  DefaultLimitNOFILE=infinity
  DefaultLimitNPROC=infinity
  DefaultLimitMEMLOCK=infinity
  DefaultLimitLOCKS=infinity
  EOT

cat < /etc/systemd/system/amadeusd.service
[Unit]
Description=AmadeusD
After=network-online.target

[Service]
Type=forking
LimitNOFILE=1048576
KillMode=control-group
Restart=always
RestartSec=3
User=root
WorkingDirectory=/root/
Environment="AUTOUPDATE=true"
ExecStart=/usr/bin/screen -UdmS amadeusd bash -c './amadeusd'

[Install]
WantedBy=default.target
EOT

systemctl enable amadeusd
systemctl start amadeusd

screen -rd amadeusd

[mrezael6798-commits]

WorkingDirectory=/home/youruser
User=youruser

[mrezael6798-commits]

cat < /etc/sysctl.conf
#buff up the UDP stack for 1gbps
net.core.wmem_max = 268435456
net.core.rmem_default = 212992
net.core.rmem_max = 268435456
net.core.netdev_max_backlog = 300000
net.core.optmem_max = 16777216
net.ipv4.udp_mem = 3060432 4080578 6120864

for normal networks: block spoofed UDP packets

net.ipv4.conf.all.rp_filter=1
net.ipv4.conf.default.rp_filter=1
EOT