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annotate files/fbhyve.in @ 474:57f253106ed6

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Implement fbhyve, a management system that runs bhyve virtual machines within tmux sessions
author Franz Glasner <fzglas.hg@dom66.de>
date Tue, 27 Aug 2024 21:47:57 +0200
parents 6ecd16725818
children 827371176fec
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1 #!/bin/sh
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2 # -*- indent-tabs-mode: nil -*-
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3
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4 # PROVIDE: fbhyve
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5 # REQUIRE: LOGIN FILESYSTEMS
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6 # KEYWORD: shutdown nojail
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7 #
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8
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9 # @(#)%%SIMPLEVERSIONTAG%%
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10
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11 #
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12 # Add the following lines to /etc/rc.conf to enable bhyve:
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13 #
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14 # fbhyve_enable (bool): Set to "NO" by default.
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15 # Acts as default for all listed VMs.
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16 # Set it to "YES" to enable bhyve.
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17 # fbhyve_list (str): Set to "" by default.
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18 # Define the names of your VMs here.
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19 # fbhyve_tmux_session_prefix (str): All tmux session names will have this
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20 # prefix string.
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21 # fbhyve_configdir (str): Where by default config files for all VMs live.
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22 # Default: $PREFIX/etc/fbhyve
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23 #
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24 #
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25 # fbhyve_<vm>_enable (bool): Allow to enable or disable a specific VM.
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26 # Set to $fbhyve_enable by default.
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27 # fbhyve_<vm>_config (str): The bhyve configuration file to use to.
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28 # The default is $fbhyve_configdir/<vm>.conf
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29 #
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31 . /etc/rc.subr
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32
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33 name="fbhyve"
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34 desc="Manage system bhyve virtual machines"
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35 rcvar="fbhyve_enable"
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36
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37 start_precmd="fbhyve_pre_start"
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38 stop_postcmd="fbhyve_post_stop"
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39 status_cmd="fbhyve_status"
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42 load_rc_config $name
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43
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44 : ${fbhyve_enable:="NO"}
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45 : ${fbhyve_list=}
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46 : ${fbhyve_tmux_session_prefix:="${name}_"}
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47 : ${fbhyve_configdir:="%%FBHYVE_ETCDIR%%"}
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49
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50 _fbhyve_vm_exists() {
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51 local _p
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52 for _p in ${fbhyve_list}; do
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53 [ "${_p}" = "$1" ] && return 0;
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54 done
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55 return 1
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56 }
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57
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58
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59 if [ $# -eq 2 ]; then
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60 _vm="$2"
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61 if ! _fbhyve_vm_exists "${_vm}"; then
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62 echo "ERROR: no VM named \`${_vm}' in \`fbhyve_list'" 1>&2
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63 exit 1
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64 fi
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65 echo "-- VM: ${_vm} --"
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66 _session="${fbhyve_tmux_session_prefix}${_vm}"
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67 _window="${_session}_console"
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68 eval fbhyve_enable="\${fbhyve_${_vm}_enable:-${fbhyve_enable}}"
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69 eval fbhyve_config="\${fbhyve_${_vm}_config:-\"${fbhyve_configdir}/${_vm}.conf\"}"
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70 else
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71 _ec=0
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72 _swap=$*; shift; _vmarglist=$*
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73 _vmlist=${_vmarglist:-${fbhyve_list}}
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74 set -- ${_swap}
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75 for _vm in ${_vmlist}; do
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76 "$0" "$1" "${_vm}"
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77 _vmec=$?
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78 if [ ${_vmec} -gt ${_ec} ]; then
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79 _ec=${_vmec}
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80 fi
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81 done
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82 exit ${_ec}
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83 fi
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84
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85 _rundir="%%FBHYVE_RUNDIR%%"
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86 pidfile="${_rundir}/${_vm}.pid"
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87 procname="bhyve:" # something like bhyve: <vmname> (bhyve)
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88
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89 required_dirs="${_rundir}"
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90 required_files="${fbhyve_config}"
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91
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92 command="%%LOCALBASE%%/bin/tmux"
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93
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94 command_args="new-session -ds ${_session} -n ${_window} \"sh -c 'echo \\\$\\\$ >\\\"${pidfile}\\\"; /usr/sbin/bhyve -k \\\"${fbhyve_config}\\\" \\\"${_vm}\\\"'\""
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95
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96
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97 fbhyve_status()
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98 {
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99 local _pid _rc
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100
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101 _rc=0
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102 _pid=$(check_pidfile "$pidfile" "$procname")
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103 if [ -n "${_pid}" ]; then
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104 echo "VM ${_vm} is running as pid $_pid."
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105 else
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106 echo "VM ${_vm} is not running."
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107 _rc=1
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108 fi
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109
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110 if ${command} has-session -t ${_session} 2>/dev/null; then
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111 echo "tmux session ${_session} exists."
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112 if [ ${_rc} -gt 0 ]; then
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113 _rc=2
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114 fi
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115 else
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116 echo "tmux session ${_session} does not exist."
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117 if [ ${_rc} -gt 0 ]; then
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118 _rc=2
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119 fi
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120 fi
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121 return ${_rc}
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122 }
464
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123
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124
474
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125 fbhyve_pre_start() {
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126 if ! load_kld -m vmm vmm.ko; then
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127 echo "ERROR: Cannot load kernel module \`vmm'" 1>&2
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128 return 1
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129 fi
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130 if [ -e "/dev/vmm/${_vm}" ]; then
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131 echo "ERROR: VM \`${_vm}' already created in the VM monitor" 1>&2
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132 return 1
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133 fi
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134 if ${command} has-session -t "${_session}" 2>/dev/null; then
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135 echo "ERROR: tmux session \`${_session}' already exists" 1>&2
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136 return 1
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137 fi
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138 return 0
464
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139 }
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140
474
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141
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142 fbhyve_post_stop() {
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143 if [ -e "/dev/vmm/${_vm}" ]; then
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144 /usr/sbin/bhyvectl --vm="${_vm}" --destroy
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145 fi
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146 if ${command} has-session -t "${_session}" 2>/dev/null; then
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147 ${command} kill-session -t "${_session}"
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148 fi
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149 rm -f "${pidfile}"
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150 return 0
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151 }
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152
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153
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154 run_rc_command "$1"