NCM::sysctl - NCM sysctl configuration component


Add/modify variables into sysctl configuration file.


  • /software/components/ncm-sysctl/command : string (required)

    Command to use to update sysctl configuration.

    Default : /sbin/sysctl

  • /software/components/ncm-sysctl/compat-v1 : boolean (required)

    This property is a boolean making sysctl accept variable definitions according to v1 of this component. This is deprecated. If you rely on this, you are advised to convert your configuration to v2 schema.

    Default : false

  • /software/components/ncm-sysctl/confFile : string (required)

    String defining sysctl configuration file. If this value contains a / character then it will be treated as an absolute path to a file which is modified in place, and a backup made.

    If the value does not contain a / then it will be treated as the name of a file to be created in /etc/sysctl.d. The existing contents of the file will be overwritten.

    Default : /etc/sysctl.conf

  • /software/components/ncm-sysctl/variables : nlist (optional)

    A nlist of key/value defining sysctl variables. There is no check that the key matches a valid key, so be cautious to use appropriate variable names. Key names must begin with a letter or an underscore. Values containing whitespace must include quotes, the component will not add them.

    Default : none.


"/software/components/sysctl/variables/kernel.shmmni" = "4096";
"/software/components/sysctl/variables/kernel.shmall" = "2097152";
"/software/components/sysctl/variables/net.ipv4.ip_local_port_range" = "1024 65000";
"/software/components/sysctl/variables/fs.file-max" = "65536";
"/software/components/sysctl/variables/fs.aio-max-size" = "1048576";
"/software/components/sysctl/variables/net.core.rmem_default" = "262144";
"/software/components/sysctl/variables/net.core.wmem_default" = "262144";