Red_Hat_Enterprise_Linux-7-Resource_Management_and_Linux_Containers_Guide-en-US.pdf

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Red Hat Enterprise Linux 7
Resource Management and Linux
Containers Guide
Managing system resources and administering Linux Containers on Red
Hat Enterprise Linux 7
Peter Ondrejka
Rüdiger Landmann
Douglas Silas
Martin Prpič
Red Hat Enterprise Linux 7 Resource Management and Linux
Containers Guide
Managing system resources and administering Linux Containers on Red
Hat Enterprise Linux 7
Peter Ondrejka
Red Hat Engineering Co ntent Services
po ndrejk@redhat.co m
Do uglas Silas
Red Hat Engineering Co ntent Services
dhensley@redhat.co m
Martin Prpič
Red Hat Security Respo nse Team
mprpic@redhat.co m
Rüdiger Landmann
Red Hat Engineering Co ntent Services
r.landmann@redhat.co m
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Abstract
Managing system resources, administering Linux Containers, and using Docker on Red Hat Enterprise
Linux 7.
Table of Contents
Table of Contents
⁠
P . . . . . . . . . . . . . . . . . . . . . . With . . . . . . . . . . . .
. .art .I. Resource. Management. . . . . .Control. Groups. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 . . . . . . . .
.
⁠
C . . . . . . . Introduction . . . . . . . . Groups . . . . . . . .
. .hapter. 1. . . . . . . . . . . . .to. Control . . . . . . . .(Cgroups). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 . . . . . . . .
.
⁠
1.1. What are Control Groups
4
⁠
1.2. Default Cgroup Hierarchies
4
⁠
1.3. Resource Controllers in Linux Kernel
6
⁠
1.4. Additional Resources
7
⁠
C . . . . . . . Using . . . . . . . . . . . .
. .hapter. 2. . . . . . .Control. Groups. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 . . . . . . . .
.
⁠
2.1. Creating Control Groups
9
⁠
2.2. Removing Control Groups
10
⁠
2.3. Modifying Control Groups
11
⁠
2.4. Obtaining Information About Control Groups
15
⁠
2.5. Additional Resources
18
⁠
C . . . . . . . . . . . . . . . . . . . . . . .
. .hapter. 3. Using .libcgroup .T.ools. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 . . . . . . . .
..
⁠
3.1. Mounting a Hierarchy
20
⁠
3.2. Unmounting a Hierarchy
22
⁠
3.3. Creating Control Groups
22
⁠
3.4. Removing Control Groups
23
⁠
3.5. Setting Cgroup Parameters
24
⁠
3.6. Moving a Process to a Control Group
25
⁠
3.7. Starting a Process in a Control Group
26
⁠
3.8. Obtaining Information About Control Groups
27
⁠
3.9. Additional Resources
28
⁠
C . . . . . . Control . . . . . . . . . . . . . . . Examples
. .hapter. 4 . . . . . . . . .Group .Application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 . . . . . . . .
..
⁠
4 .1. Prioritizing Database I/O
29
⁠
4 .2. Prioritizing Network T raffic
30
⁠
P . . . . . . . . . . . . . . . . .
. .art .II. .Linux. Containers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32 . . . . . . . .
..
⁠
C . . . . . . . Introduction . . . . . . . . . . . . . . .
. .hapter. 5. . . . . . . . . . . . .to. Linux .Containers. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33 . . . . . . . .
..
⁠
5.1. Linux Containers Architecture
33
⁠
5.2. Secure Containers with SELinux
35
⁠
5.3. Container Use Cases
35
⁠
5.4. Application Packaging with Docker
38
⁠
5.5. Linux Containers Compared to KVM Virtualization
38
⁠
5.6. Additional Resources
39
⁠
C . . . . . . . Using . . . . . .
. .hapter. 6. . . . . . .Docker . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4 0 . . . . . . . .
..
⁠
6.1. Working with Docker Images
40
⁠
6.2. Managing Containers
42
⁠
6.3. Monitoring Images and Containers
45
⁠
6.4. Using Dockerfiles
50
⁠
6.5. Networking
52
⁠
6.6. Sharing Data Across Containers
53
⁠
6.7. Publishing Images
56
⁠
6.8. Additional Resources
57
⁠
C . . . . . . . Using . . . .
. .hapter. 7. . . . . . .virsh . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58 . . . . . . . .
..
⁠
7.1. Connecting to the LXC Driver
58
⁠
7.2. T he virsh Utility
59
⁠
7.3. Creating a Container
59
⁠
7.4. Starting, Connecting to, and Stopping a Container
60
⁠
7.5. Modifying a Container
61
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