Привет, Jail это chroot плюс опционально виртуализированный сетевой стек плюс запрет руту из клетки влиять на хост. Не виртуальная машина даже близко, для этого bhyve. Чуть больше: процессы работают в собственном jailspace назовем его так, которые грохаются вместе с jail affinity Limit the number of commands from exec.* Следующие sysctl'ки дают приблизительный обзор ограничений:
security.bsd.see_jail_proc: 1 security.jail.mount_tmpfs_allowed: 0 security.jail.mount_zfs_allowed: 0 security.jail.mount_procfs_allowed: 0 security.jail.mount_devfs_allowed: 0 security.jail.param.sysvshm.: 0 security.jail.param.sysvsem.: 0 security.jail.param.sysvmsg.: 0 security.jail.param.allow.mount.tmpfs: 0 security.jail.param.allow.mount.zfs: 0 security.jail.param.allow.mount.procfs: 0 security.jail.param.allow.mount.devfs: 0 security.jail.param.allow.mount.: 0 security.jail.param.allow.suser: 0 security.jail.param.allow.unprivileged_proc_debug: 0 security.jail.param.allow.read_msgbuf: 0 security.jail.param.allow.reserved_ports: 0 security.jail.param.allow.mlock: 0 security.jail.param.allow.socket_af: 0 security.jail.param.allow.quotas: 0 security.jail.param.allow.chflags: 0 security.jail.param.allow.raw_sockets: 0 security.jail.param.allow.sysvipc: 0 security.jail.param.allow.set_hostname: 0 security.jail.param.ip6.saddrsel: 0 security.jail.param.ip6.: 0 security.jail.param.ip4.saddrsel: 0 security.jail.param.ip4.: 0 security.jail.param.cpuset.id: 0 security.jail.param.host.hostid: 0 security.jail.param.host.hostuuid: 64 security.jail.param.host.domainname: 256 security.jail.param.host.hostname: 256 security.jail.param.host.: 0 security.jail.param.children.max: 0 security.jail.param.children.cur: 0 security.jail.param.dying: 0 security.jail.param.vnet: 0 security.jail.param.persist: 0 security.jail.param.devfs_ruleset: 0 security.jail.param.enforce_statfs: 0 security.jail.param.osrelease: 32 security.jail.param.osreldate: 0 security.jail.param.securelevel: 0 security.jail.param.path: 1024 security.jail.param.name: 256 security.jail.param.parent: 0 security.jail.param.jid: 0 security.jail.devfs_ruleset: 0 security.jail.enforce_statfs: 2 security.jail.mount_allowed: 0 security.jail.chflags_allowed: 0 security.jail.allow_raw_sockets: 0 security.jail.sysvipc_allowed: 0 security.jail.socket_unixiproute_only: 1 security.jail.set_hostname_allowed: 1 security.jail.jail_max_af_ips: 255 security.jail.vnet: 0
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