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|
local SL = require("scriptlee")
local newHttpClient = SL.newHttpClient
local newShellcmd = SL.newShellcmd
local newSqlite = SL.newSqlite
local objectSeal = SL.objectSeal
local parseJSON = SL.parseJSON
local startOrExecute = SL.reactor.startOrExecute
SL = nil
local log = io.stdout
function printHelp()
io.write("\n"
.." WARN: This is experimental.\n"
.." \n"
.." Options:\n"
.." --backendHost <inaddr> (eg \"localhost\")\n"
.." --backendPort <int> (eg 80)\n"
.." --sshPort <int> (eg 22)\n"
.." --sshUser <str> (eg \"eddieuser\")\n"
.." --state <path> (eg \"path/to/state\")\n"
.." \n")
end
function parseArgs( app )
app.backendPort = 80
app.sshPort = 22
app.sshUser = os.getenv("USERNAME") or false
app.statePath = ":memory:"
local iA = 0
::nextArg::
iA = iA + 1
local arg = _ENV.arg[iA]
if not arg then
goto verifyResult
elseif arg == "--help" then
app.isHelp = true return 0
elseif arg == "--backendHost" then
iA = iA + 1; arg = _ENV.arg[iA]
if not arg then log:write("EINVAL: --backendHost needs value\n")return end
app.backendHost = arg
elseif arg == "--backendPort" then
iA = iA + 1; arg = _ENV.arg[iA]
if not arg then log:write("EINVAL: --backendPort needs value\n")return end
app.backendHost = arg
elseif arg == "--sshPort" then
iA = iA + 1; arg = _ENV.arg[iA]
if not arg then log:write("EINVAL: --sshPort needs value\n")return end
app.sshPort = arg
elseif arg == "--sshUser" then
iA = iA + 1; arg = _ENV.arg[iA]
if not arg then log:write("EINVAL: --sshUser needs value\n")return end
app.sshUser = arg
elseif arg == "--state" then
iA = iA + 1; arg = _ENV.arg[iA]
if not arg then log:write("EINVAL: --state needs value\n")return end
app.statePath = arg
else
log:write("EINVAL: ".. arg .."\n")return
end
goto nextArg
::verifyResult::
if not app.backendHost then log:write("EINVAL: --backendHost missing\n")return end
if not app.sshUser then log:write("EINVAL: --sshUser missing")return end
return 0
end
function getStateDb(app)
if not app.stateDb then
local db = newSqlite{ database = assert(app.statePath) }
-- TODO normalize scheme
db:prepare("CREATE TABLE IF NOT EXISTS DeviceDfLog(\n"
.." id INTEGER PRIMARY KEY,\n"
.." \"when\" TEXT NOT NULL,\n" -- "https://xkcd.com/1179"
.." hostname TEXT NOT NULL,\n"
.." eddieName TEXT NOT NULL,\n"
.." rootPartitionUsedPercent INT,\n"
.." varLibDockerUsedPercent INT,\n"
.." varLogUsedPercent INT,\n"
.." dataUsedPercent INT,\n"
.." stderr TEXT NOT NULL,\n"
.." stdout TEXT NOT NULL)\n"
..";"):execute()
app.stateDb = db
end
return app.stateDb
end
function storeDiskFullResult( app, hostname, eddieName, stderrBuf, stdoutBuf )
assert(app and hostname and eddieName and stderrBuf and stdoutBuf);
local rootPartitionUsedPercent = stdoutBuf:match("\n/[^ ]+ +%d+ +%d+ +%d+ +(%d+)%% /\n")
local varLibDockerUsedPercent = stdoutBuf:match("\n[^ ]+ +%d+ +%d+ +%d+ +(%d+)%% /var/lib/docker\n")
local dataUsedPercent = stdoutBuf:match("\n[^ ]+ +%d+ +%d+ +%d+ +(%d+)%% /data\n")
local varLogUsedPercent = stdoutBuf:match("\n[^ ]+ +%d+ +%d+ +%d+ +(%d+)%% /var/log\n")
local stmt = getStateDb(app):prepare("INSERT INTO DeviceDfLog("
.." \"when\", hostname, eddieName, stderr, stdout,"
.." rootPartitionUsedPercent, dataUsedPercent, varLibDockerUsedPercent, varLogUsedPercent, dataUsedPercent"
..")VALUES("
.." $when, $hostname, $eddieName, $stderr, $stdout,"
.." $rootPartitionUsedPercent, $dataUsedPercent, $varLibDockerUsedPercent, $varLogUsedPercent, $dataUsedPercent);")
stmt:bind("$when", os.date("!%Y-%m-%dT%H:%M:%SZ"))
stmt:bind("$hostname", hostname)
stmt:bind("$eddieName", eddieName)
stmt:bind("$stderr", stderrBuf)
stmt:bind("$stdout", stdoutBuf)
stmt:bind("$rootPartitionUsedPercent", rootPartitionUsedPercent)
stmt:bind("$varLibDockerUsedPercent", varLibDockerUsedPercent)
stmt:bind("$varLogUsedPercent", varLogUsedPercent)
stmt:bind("$dataUsedPercent", dataUsedPercent)
stmt:execute()
end
function doWhateverWithDevices( app )
for k, dev in pairs(app.devices) do
log:write("[INFO ] Inspecting '".. dev.hostname .."' (@ ".. dev.eddieName ..") ...\n")
local fookCmd = "true"
.." && HOSTNAME=$(hostname|sed 's_.isa.localdomain__')"
.." && STAGE=$PAISA_ENV"
.." && printf \"remoteHostname=$HOSTNAME, remoteStage=$STAGE\\n\""
-- on some machine, df failed with "Stale file handle" But I want to continue
-- with next device regardless of such errors.
.." && df || true"
local eddieCmd = "true"
.." && HOSTNAME=$(hostname|sed 's_.pnet.ch__')"
.." && STAGE=$PAISA_ENV"
.." && printf \"remoteEddieName=$HOSTNAME, remoteStage=$STAGE\\n\""
.." && if test \"${HOSTNAME}\" != \"".. dev.eddieName .."\"; then true"
.." && echo wrong host. Want ".. dev.eddieName .." found $HOSTNAME && false"
.." ;fi"
.." && ssh -oStrictHostKeyChecking=no -oUserKnownHostsFile=/dev/null"
.." -p".. app.sshPort .." ".. app.sshUser .."@".. ((dev.type == "FOOK")and"fook"or dev.hostname)
.." \\\n --"
.." sh -c 'true && ".. fookCmd:gsub("'", "'\"'\"'") .."'"
local localCmd = assert(os.getenv("SSH_EXE"), "environ.SSH_EXE missing")
.." -oRemoteCommand=none -oStrictHostKeyChecking=no -oUserKnownHostsFile=/dev/null"
.." -p".. app.sshPort .." ".. app.sshUser .."@".. dev.eddieName ..""
.." \\\n --"
.." sh -c 'true && ".. eddieCmd:gsub("'", "'\"'\"'") .."'"
-- TODO get rid of this ugly use-tmp-file-as-script workaround
local tmpPath = assert(os.getenv("TMP"), "environ.TMP missing"):gsub("\\", "/") .."/b30589uj30oahujotehuj.sh"
--log:write("[DEBUG] tmpPath '".. tmpPath .."'\n")
local tmpFile = assert(io.open(tmpPath, "wb"), "Failed to open '".. tmpPath .."'")
tmpFile:write("#!/bin/sh\n".. localCmd .."\n")
tmpFile:close()
--log:write("[DEBUG] tmpPath ".. tmpPath .."\n")
-- EndOf kludge
local cmd = objectSeal{
base = false,
stdoutBuf = {},
stderrBuf = {},
}
cmd.base = newShellcmd{
cls = cmd,
cmdLine = "sh \"".. tmpPath .."\"",
onStdout = function( buf, cmd ) table.insert(cmd.stdoutBuf, buf or"") end,
onStderr = function( buf, cmd ) table.insert(cmd.stderrBuf, buf or"") end,
}
cmd.base:start()
cmd.base:closeSnk()
local exit, signal = cmd.base:join(17)
cmd.stderrBuf = table.concat(cmd.stderrBuf)
cmd.stdoutBuf = table.concat(cmd.stdoutBuf)
if exit == 255 and signal == nil then
log:write("[DEBUG] fd2: ".. cmd.stderrBuf:gsub("\n", "\n[DEBUG] fd2: "):gsub("\n%[DEBUG%] fd2: $", "") .."\n")
goto nextDevice
end
log:write("[DEBUG] fd1: ".. cmd.stdoutBuf:gsub("\n", "\n[DEBUG] fd1: "):gsub("\n%[DEBUG%] fd1: $", "") .."\n")
storeDiskFullResult(app, dev.hostname, dev.eddieName, cmd.stderrBuf, cmd.stdoutBuf)
if exit ~= 0 or signal ~= nil then
error("exit=".. tostring(exit)..", signal="..tostring(signal))
end
::nextDevice::
end
end
function sortDevicesMostRecentlySeenFirst( app )
table.sort(app.devices, function(a, b) return a.lastSeen > b.lastSeen end)
end
-- Don't want to visit just seen devices over and over again. So drop devices
-- we've recently seen from our devices-to-visit list.
function dropDevicesRecentlySeen( app )
-- Collect recently seen devices.
local devicesToRemove = {}
local st = getStateDb(app):prepare("SELECT hostname FROM DeviceDfLog WHERE \"when\" > $tresholdDate")
st:bind("$tresholdDate", os.date("!%Y-%m-%dT%H:%M:%SZ", os.time()-42*3600))
local rs = st:execute()
while rs:next() do
local hostname = rs:value(1)
devicesToRemove[hostname] = true
end
-- Remove selected devices
local numKeep, numDrop = 0, 0
local iD = 0 while true do iD = iD + 1
local device = app.devices[iD]
if not device then break end
if devicesToRemove[device.hostname] then
--log:write("[DEBUG] Drop '".. device.hostname .."' (".. device.eddieName ..")\n")
numDrop = numDrop + 1
app.devices[iD] = app.devices[#app.devices]
app.devices[#app.devices] = nil
iD = iD - 1
else
--log:write("[DEBUG] Keep '".. device.hostname .."' (".. device.eddieName ..")\n")
numKeep = numKeep + 1
end
end
log:write("[INFO ] Of "..(numKeep+numDrop).." devices from state visit ".. numKeep
.." and skip ".. numDrop .." (bcause seen recently)\n")
end
function fetchDevices( app )
local req = objectSeal{
base = false,
method = "GET",
uri = "/houston/vehicle/inventory/v1/info/devices",
rspCode = false,
rspBody = false,
isDone = false,
}
req.base = app.http:request{
cls = req, connectTimeoutMs = 3000,
host = app.backendHost, port = app.backendPort,
method = req.method, url = req.uri,
onRspHdr = function( rspHdr, req )
req.rspCode = rspHdr.status
if rspHdr.status ~= 200 then
log:write(".-----------------------------------------\n")
log:write("| ".. req.method .." ".. req.uri .."\n")
log:write("| Host: ".. app.backendHost ..":".. app.backendPort .."\n")
log:write("+-----------------------------------------\n")
log:write("| ".. rspHdr.proto .." ".. rspHdr.status .." ".. rspHdr.phrase .."\n")
for i,h in ipairs(rspHdr.headers) do log:write("| ".. h[1] ..": ".. h[2] .."\n") end
log:write("| \n")
end
end,
onRspChunk = function( buf, req )
if req.rspCode ~= 200 then log:write("| ".. buf:gsub("\n", "\n| ")) return end
if buf then
if not req.rspBody then req.rspBody = buf
else req.rspBody = req.rspBody .. buf end
end
end,
onRspEnd = function( req )
if req.rspCode ~= 200 then log:write("\n'-----------------------------------------\n") end
req.isDone = true
end,
}
req.base:closeSnk()
assert(req.isDone)
if req.rspCode ~= 200 then log:write("ERROR: Couldn't fetch devices\n")return end
assert(not app.devices)
app.devices = {}
log:write("[DEBUG] rspBody.len is ".. req.rspBody:len() .."\n")
--io.write(req.rspBody)io.write("\n")
for iD, device in pairs(parseJSON(req.rspBody).devices) do
--print("Wa", iD, device)
--for k,v in pairs(device)do print("W",k,v)end
-- TODO how to access 'device.type'?
local hostname , eddieName , lastSeen
= device.hostname:value(), device.eddieName:value(), device.lastSeen:value()
local typ
if false then
elseif hostname:find("^eddie%d%d%d%d%d$") then
typ = "EDDIE"
elseif hostname:find("^fook%-[a-z0-9]+$") then
typ = "FOOK"
elseif hostname:find("^lunkwill%-[a-z0-9]+$") then
typ = "LUNKWILL"
elseif hostname:find("^fook$") then
log:write("[WARN ] WTF?!? '"..hostname.."'\n")
typ = false
else error("TODO_359zh8i3wjho "..hostname) end
table.insert(app.devices, objectSeal{
hostname = hostname,
eddieName = eddieName,
type = typ,
lastSeen = lastSeen,
})
end
log:write("[INFO ] Fetched ".. #app.devices .." devices.\n")
end
function run( app )
fetchDevices(app)
dropDevicesRecentlySeen(app)
--sortDevicesMostRecentlySeenFirst(app)
doWhateverWithDevices(app)
end
function main()
local app = objectSeal{
isHelp = false,
backendHost = false,
backendPort = false,
sshPort = false,
sshUser = false,
statePath = false,
stateDb = false,
http = newHttpClient{},
devices = false,
}
if parseArgs(app) ~= 0 then os.exit(1) end
if app.isHelp then printHelp() return end
run(app)
end
startOrExecute(main)
|