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72 lines
1.8 KiB
Go
72 lines
1.8 KiB
Go
/*
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Copyright 2015 The Kubernetes Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package glusterfs
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import (
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"bufio"
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"fmt"
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"os"
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"github.com/golang/glog"
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)
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// readGlusterLog will take the last 2 lines of the log file
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// on failure of gluster SetUp and return those so kubelet can
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// properly expose them
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// return nil on any failure
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func readGlusterLog(path string, podName string) error {
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var line1 string
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var line2 string
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linecount := 0
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glog.Infof("glusterfs: failure, now attempting to read the gluster log for pod %s", podName)
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// Check and make sure path exists
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if len(path) == 0 {
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return fmt.Errorf("glusterfs: log file does not exist for pod: %s", podName)
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}
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// open the log file
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file, err := os.Open(path)
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if err != nil {
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return fmt.Errorf("glusterfs: could not open log file for pod: %s", podName)
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}
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defer file.Close()
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// read in and scan the file using scanner
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// from stdlib
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fscan := bufio.NewScanner(file)
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// rather than guessing on bytes or using Seek
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// going to scan entire file and take the last two lines
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// generally the file should be small since it is pod specific
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for fscan.Scan() {
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if linecount > 0 {
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line1 = line2
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}
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line2 = "\n" + fscan.Text()
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linecount++
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}
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if linecount > 0 {
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return fmt.Errorf("%v", line1+line2+"\n")
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}
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return nil
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}
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