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# It's not recommended to modify this file in-place, because it will be
# overwritten during upgrades. If you want to customize, the best
# way is to use the "systemctl edit" command to create an override unit.
# For example, to pass additional options, create an override unit
# (as is done by systemctl edit) and enter the following:
# [Service]
# Environment=OPTIONS="-l 127.0.0.1,::1"
[Unit]
Description=memcached daemon
After=network.target
[Service]
EnvironmentFile=/etc/sysconfig/memcached
ExecStart=/usr/bin/memcached -p ${PORT} -u ${USER} -m ${CACHESIZE} -c ${MAXCONN} $OPTIONS
# Set up a new file system namespace and mounts private /tmp and /var/tmp directories
# so this service cannot access the global directories and other processes cannot
# access this service's directories.
PrivateTmp=true
# Mounts the /usr, /boot, and /etc directories read-only for processes invoked by this unit.
ProtectSystem=full
# Ensures that the service process and all its children can never gain new privileges
NoNewPrivileges=true
# Sets up a new /dev namespace for the executed processes and only adds API pseudo devices
# such as /dev/null, /dev/zero or /dev/random (as well as the pseudo TTY subsystem) to it,
# but no physical devices such as /dev/sda.
PrivateDevices=true
# Required for dropping privileges and running as a different user
CapabilityBoundingSet=CAP_SETGID CAP_SETUID CAP_SYS_RESOURCE
# Attempts to create memory mappings that are writable and executable at the same time,
# or to change existing memory mappings to become executable are prohibited.
MemoryDenyWriteExecute=true
# Explicit module loading will be denied. This allows to turn off module load and unload
# operations on modular kernels. It is recommended to turn this on for most services that
# do not need special file systems or extra kernel modules to work.
ProtectKernelModules=true
# Kernel variables accessible through /proc/sys, /sys, /proc/sysrq-trigger, /proc/latency_stats,
# /proc/acpi, /proc/timer_stats, /proc/fs and /proc/irq will be made read-only to all processes
# of the unit. Usually, tunable kernel variables should only be written at boot-time, with the
# sysctl.d(5) mechanism. Almost no services need to write to these at runtime; it is hence
# recommended to turn this on for most services.
ProtectKernelTunables=true
# The Linux Control Groups (cgroups(7)) hierarchies accessible through /sys/fs/cgroup will be
# made read-only to all processes of the unit. Except for container managers no services should
# require write access to the control groups hierarchies; it is hence recommended to turn this on
# for most services
ProtectControlGroups=true
# Any attempts to enable realtime scheduling in a process of the unit are refused.
RestrictRealtime=true
# Restricts the set of socket address families accessible to the processes of this unit.
# Protects against vulnerabilities such as CVE-2016-8655
RestrictAddressFamilies=AF_INET AF_INET6 AF_UNIX
# Takes away the ability to create or manage any kind of namespace
RestrictNamespaces=true
[Install]
WantedBy=multi-user.target
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