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https://github.com/zrepl/zrepl.git
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10a14a8c50
package trace:
- introduce the concept of tasks and spans, tracked as linked list within ctx
- see package-level docs for an overview of the concepts
- **main feature 1**: unique stack of task and span IDs
- makes it easy to follow a series of log entries in concurrent code
- **main feature 2**: ability to produce a chrome://tracing-compatible trace file
- either via an env variable or a `zrepl pprof` subcommand
- this is not a CPU profile, we already have go pprof for that
- but it is very useful to visually inspect where the
replication / snapshotter / pruner spends its time
( fixes #307 )
usage in package daemon/logging:
- goal: every log entry should have a trace field with the ID stack from package trace
- make `logging.GetLogger(ctx, Subsys)` the authoritative `logger.Logger` factory function
- the context carries a linked list of injected fields which
`logging.GetLogger` adds to the logger it returns
- `logging.GetLogger` also uses package `trace` to get the
task-and-span-stack and injects it into the returned logger's fields
55 lines
1.2 KiB
Go
55 lines
1.2 KiB
Go
package tests
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import (
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"fmt"
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"strings"
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"github.com/zrepl/zrepl/platformtest"
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"github.com/zrepl/zrepl/zfs"
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)
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func BatchDestroy(ctx *platformtest.Context) {
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platformtest.Run(ctx, platformtest.PanicErr, ctx.RootDataset, `
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DESTROYROOT
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CREATEROOT
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+ "foo bar"
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+ "foo bar@1"
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+ "foo bar@2"
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+ "foo bar@3"
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R zfs hold zrepl_platformtest "${ROOTDS}/foo bar@2"
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`)
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reqs := []*zfs.DestroySnapOp{
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&zfs.DestroySnapOp{
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ErrOut: new(error),
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Filesystem: fmt.Sprintf("%s/foo bar", ctx.RootDataset),
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Name: "3",
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},
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&zfs.DestroySnapOp{
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ErrOut: new(error),
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Filesystem: fmt.Sprintf("%s/foo bar", ctx.RootDataset),
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Name: "2",
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},
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}
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zfs.ZFSDestroyFilesystemVersions(ctx, reqs)
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if *reqs[0].ErrOut != nil {
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panic("expecting no error")
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}
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err := (*reqs[1].ErrOut).Error()
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if !strings.Contains(err, fmt.Sprintf("%s/foo bar@2", ctx.RootDataset)) {
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panic(fmt.Sprintf("expecting error about being unable to destroy @2: %T\n%s", err, err))
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}
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platformtest.Run(ctx, platformtest.PanicErr, ctx.RootDataset, `
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!N "foo bar@3"
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!E "foo bar@1"
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!E "foo bar@2"
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R zfs release zrepl_platformtest "${ROOTDS}/foo bar@2"
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- "foo bar@2"
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- "foo bar@1"
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- "foo bar"
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`)
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}
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