diff --git a/Dockerfile b/Dockerfile index 5fd8f1a3..3b1c8ac6 100644 --- a/Dockerfile +++ b/Dockerfile @@ -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 diff --git a/libcontainer/container_linux.go b/libcontainer/container_linux.go index c239cf30..ef443f6f 100644 --- a/libcontainer/container_linux.go +++ b/libcontainer/container_linux.go @@ -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. diff --git a/libcontainer/criurpc/criurpc.pb.go b/libcontainer/criurpc/criurpc.pb.go index 21af9db9..1332d3fe 100644 --- a/libcontainer/criurpc/criurpc.pb.go +++ b/libcontainer/criurpc/criurpc.pb.go @@ -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 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0xff, 0xff, 0xc2, 0x38, 0x55, 0x41, 0x7c, + 0x0d, 0x00, 0x00, } diff --git a/libcontainer/criurpc/criurpc.proto b/libcontainer/criurpc/criurpc.proto index 48e42e26..0493ec71 100644 --- a/libcontainer/criurpc/criurpc.proto +++ b/libcontainer/criurpc/criurpc.proto @@ -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 { diff --git a/tests/integration/checkpoint.bats b/tests/integration/checkpoint.bats index 8ee28112..92fe559e 100644 --- a/tests/integration/checkpoint.bats +++ b/tests/integration/checkpoint.bats @@ -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 +} +