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Merge pull request #1933 from adrianreber/master 

Add CRIU configuration file support
This commit is contained in:
Michael Crosby 2019-01-15 11:22:38 -05:00 committed by GitHub
parent 12f6a99120 403986c5dd
commit 4e9d52da54
No known key found for this signature in database
GPG Key ID: 4AEE18F83AFDEB23
5 changed files with 207 additions and 114 deletions
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4
Dockerfile
View File

@ -45,10 +45,14 @@ RUN cd /tmp \
&& rm -rf /tmp/bats
# install criu
# For CRIU 3.11 one patch is needed for the test 'checkpoint and restore with container specific CRIU config'
# This should be no longer necessary with CRIU 3.12
# See https://github.com/opencontainers/runc/pull/1933
ENV CRIU_VERSION v3.11
RUN mkdir -p /usr/src/criu \
&& curl -sSL https://github.com/checkpoint-restore/criu/archive/${CRIU_VERSION}.tar.gz | tar -v -C /usr/src/criu/ -xz --strip-components=1 \
&& cd /usr/src/criu \
&& curl https://github.com/checkpoint-restore/criu/commit/bb0b2f2635d71e549851b7c626a1464e42a3b5c7.patch | patch -p1 \
&& make install-criu \
&& rm -rf /usr/src/criu

30
libcontainer/container_linux.go
View File

@ -875,6 +875,32 @@ func waitForCriuLazyServer(r *os.File, status string) error {
return nil
}
func (c *linuxContainer) handleCriuConfigurationFile(rpcOpts *criurpc.CriuOpts) {
// CRIU will evaluate a configuration starting with release 3.11.
// Settings in the configuration file will overwrite RPC settings.
// Look for annotations. The annotation 'org.criu.config'
// specifies if CRIU should use a different, container specific
// configuration file.
_, annotations := utils.Annotations(c.config.Labels)
configFile, exists := annotations["org.criu.config"]
if exists {
// If the annotation 'org.criu.config' exists and is set
// to a non-empty string, tell CRIU to use that as a
// configuration file. If the file does not exist, CRIU
// will just ignore it.
if configFile != "" {
rpcOpts.ConfigFile = proto.String(configFile)
}
// If 'org.criu.config' exists and is set to an empty
// string, a runc specific CRIU configuration file will
// be not set at all.
} else {
// If the mentioned annotation has not been found, specify
// a default CRIU configuration file.
rpcOpts.ConfigFile = proto.String("/etc/criu/runc.conf")
}
}
func (c *linuxContainer) Checkpoint(criuOpts *CriuOpts) error {
c.m.Lock()
defer c.m.Unlock()
@ -940,6 +966,8 @@ func (c *linuxContainer) Checkpoint(criuOpts *CriuOpts) error {
LazyPages: proto.Bool(criuOpts.LazyPages),
}
c.handleCriuConfigurationFile(&rpcOpts)
// If the container is running in a network namespace and has
// a path to the network namespace configured, we will dump
// that network namespace as an external namespace and we
@ -1190,6 +1218,8 @@ func (c *linuxContainer) Restore(process *Process, criuOpts *CriuOpts) error {
},
}
c.handleCriuConfigurationFile(req.Opts)
// Same as during checkpointing. If the container has a specific network namespace
// assigned to it, this now expects that the checkpoint will be restored in a
// already created network namespace.

236
libcontainer/criurpc/criurpc.pb.go
View File

@ -1,6 +1,5 @@
// Code generated by protoc-gen-go.
// Code generated by protoc-gen-go. DO NOT EDIT.
// source: criurpc.proto
// DO NOT EDIT!
/*
Package criurpc is a generated protocol buffer package.
@ -393,6 +392,7 @@ type CriuOpts struct {
LazyPages *bool `protobuf:"varint,48,opt,name=lazy_pages,json=lazyPages" json:"lazy_pages,omitempty"`
StatusFd *int32 `protobuf:"varint,49,opt,name=status_fd,json=statusFd" json:"status_fd,omitempty"`
OrphanPtsMaster *bool `protobuf:"varint,50,opt,name=orphan_pts_master,json=orphanPtsMaster" json:"orphan_pts_master,omitempty"`
ConfigFile *string `protobuf:"bytes,51,opt,name=config_file,json=configFile" json:"config_file,omitempty"`
XXX_unrecognized []byte `json:"-"`
}
@ -748,6 +748,13 @@ func (m *CriuOpts) GetOrphanPtsMaster() bool {
return false
}
func (m *CriuOpts) GetConfigFile() string {
if m != nil && m.ConfigFile != nil {
return *m.ConfigFile
}
return ""
}
type CriuDumpResp struct {
Restored *bool `protobuf:"varint,1,opt,name=restored" json:"restored,omitempty"`
XXX_unrecognized []byte `json:"-"`
@ -1062,117 +1069,118 @@ func init() {
func init() { proto.RegisterFile("criurpc.proto", fileDescriptor0) }
var fileDescriptor0 = []byte{
// 1781 bytes of a gzipped FileDescriptorProto
// 1795 bytes of a gzipped FileDescriptorProto
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0x0d, 0x00, 0x00,
}

1
libcontainer/criurpc/criurpc.proto
View File

@ -111,6 +111,7 @@ message criu_opts {
optional bool lazy_pages = 48;
optional int32 status_fd = 49;
optional bool orphan_pts_master = 50;
optional string config_file = 51;
}
message criu_dump_resp {

50
tests/integration/checkpoint.bats
View File

@ -292,3 +292,53 @@ function teardown() {
ip netns del $ns_name
}
@test "checkpoint and restore with container specific CRIU config" {
# XXX: currently criu require root containers.
requires criu root
tmp=`mktemp /tmp/runc-criu-XXXXXX.conf`
# This is the file we write to /etc/criu/default.conf
tmplog1=`mktemp /tmp/runc-criu-log-XXXXXX.log`
unlink $tmplog1
tmplog1=`basename $tmplog1`
# That is the actual configuration file to be used
tmplog2=`mktemp /tmp/runc-criu-log-XXXXXX.log`
unlink $tmplog2
tmplog2=`basename $tmplog2`
# This adds the annotation 'org.criu.config' to set a container
# specific CRIU config file.
sed -i "s;\"process\";\"annotations\":{\"org.criu.config\": \"$tmp\"},\"process\";" config.json
# Tell CRIU to use another configuration file
mkdir -p /etc/criu
echo "log-file=$tmplog1" > /etc/criu/default.conf
# Make sure the RPC defined configuration file overwrites the previous
echo "log-file=$tmplog2" > $tmp
runc run -d --console-socket $CONSOLE_SOCKET test_busybox
[ "$status" -eq 0 ]
testcontainer test_busybox running
# checkpoint the running container
runc --criu "$CRIU" checkpoint --work-path ./work-dir test_busybox
[ "$status" -eq 0 ]
! test -f ./work-dir/$tmplog1
test -f ./work-dir/$tmplog2
# after checkpoint busybox is no longer running
runc state test_busybox
[ "$status" -ne 0 ]
test -f ./work-dir/$tmplog2 && unlink ./work-dir/$tmplog2
# restore from checkpoint
runc --criu "$CRIU" restore -d --work-path ./work-dir --console-socket $CONSOLE_SOCKET test_busybox
[ "$status" -eq 0 ]
! test -f ./work-dir/$tmplog1
test -f ./work-dir/$tmplog2
# busybox should be back up and running
testcontainer test_busybox running
unlink $tmp
test -f ./work-dir/$tmplog2 && unlink ./work-dir/$tmplog2
}